Nexus C-6 Installation Instructions Manual

Brand: Nexus

Model: C-6

Category: Audio amplifiers

Type: Installation Instructions Manual

INSTALLATION INSTRUCTIONS

C-6 MULTI-ROOM CONTROLLER

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus

(including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two

blades with one wider than the other. A grounding type plug has two blades and a third grounding

prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit

into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles,

and the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the

apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid

injury from tip-over.

13. Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been

damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects

have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate

normally, or has been dropped.

The lightning flash with arrowhead symbol within an equilateral triangle, is

intended to alert the user to the presence of uninsulated "dangerous

voltage " within the product's enclosure that may be of sufficient magnitude

to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the

user to the presence of important operating and maintenance (servicing)

instructions in the literature accompanying the product.

WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

Do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids, such as

vases, are placed on the equipment.

To completely disconnect this equipment from the AC mains, disconnect the power supply cord plug from

the AC receptacle.

The mains plug of the power supply cord shall remain readily operable.

NEXUS AUDIO SYSTEMS

C-6 INSTALLATION INSTRUCTIONS

INTRODUCTION

Welcome to Nexus Audio Systems and congratulations on your purchase of the C-6 Multi-Room

Audio/Video System. The C-6 is a multi-zone controller that supports 6 independently operated

zones as well as 5 external audio/video source components in addition to a built in AM/FM Tuner

module. Engineered for the future, the unit includes a RS-232 Serial Port and a “Feature” Port for

future advanced control capabilities. This means that your system can easily be integrated with

other home automation systems. The Nexus C-6 provides paging capability and a mute function

that can integrate with your doorbell or telephone system to ensure you will not miss that

important call or visitor.

The system is expandable to 18 zones using the X-1 and X-2 Expansion Controllers. The K-8 and

K-22 Keypads provide simple, intuitive control. Both models control Zone Power, Source

Selection, Source Control, Volume, Treble and Bass. With an easy to read backlit LCD, there is

never any question to the user of system status, the source selected, or volume. The K-22

provides the additional flexibility of direct tuning, disc and track selection. In Group Mode, the K-

22 Keypad can scroll and display configurable zone names to aid in setting up groups for

temporary ‘Party Mode’ configurations. Both Keypads feature an Infrared receiver that can be

used with the R-1 Handheld Remote for additional flexibility and armchair control.

The greatest feature of the C-6 is its ‘Phantom Control’ Technology. The C-6 requires no special

control wiring by integrating easily onto the same 4 wires used to drive the speakers. This makes

the C-6 the perfect choice for any installation. With new or existing construction, the C-6 provides

the greatest flexibility, ease of operation and simplicity of installation of any multi-room product on

the market today.

SYSTEM OVERVIEW

• 6 independent zones (up to 18 using the X-1 and X-2 Expansion Controllers)

• 40 watts per zone; 20W/channel (20Hz to 20 KHz) @ .1% THD all zones driven

• 5 A/V Source inputs

• Automatic power management of common source components

• Built in AM/FM Tuner (with 10 presets) in addition to the 5 A/V inputs

• Audio and Video inputs for whole-house paging

• Doorbell or telephone mute function

• Custom Zone and Source naming

• Zone grouping and sharing

• High current toroidial power supply

• Infrared learning microprocessor with six 3.5mm output jacks

• 12VDC Trigger out @ 100mA

• “Phantom Control” over existing or newly installed four-conductor speaker wire

• RS-232 Serial Port

• “Feature Port” for future control capability

• Dimensions: 17”W x 3 7/8H x 14” D (including feet and connections)

• 120 VAC 650 Watts

• Comprehensive 5-Year Parts and Labor Warranty

Figure 1. C-6 Controller Front Panel

FEATURES

Controller

Front Panel

1. Preset – Press ▲ or ▼ to scroll up or down the 10 Preset AM or FM Stations.

2. Mono·Stereo – Press to switch FM stations between stereo and mono modes. This can

sometimes be useful for tuning weak FM Stereo stations

3. AM·FM – Press to toggle between AM and FM bands.

4. Tuner Presets – Press to program or select up to 10 AM or FM preset stations.

5. C-6 Controller Display – Backlit LCD provides information regarding: Tuner preset number,

frequency, and mode. Also displays multiple screens for Controller Setup and programming

modes.

6. Seek·Tune – Press to toggle Tuning mode. SEEK will automatically search for the next

station up or down the dial when the TUNE UP/DOWN buttons are pressed. TUNE will step

up or down the dial with single button presses or scroll when held.

7. Tune – Press ▲ or ▼ to change tuner frequency UP or DOWN.

8. IR Learning Eye – Recessed IR sensor used for programming IR commands.

9. Program (Button & LEDs) – Press to activate/exit IR programming mode. Program LED will

illuminate red when programming mode is active. Learn LED will flash red or green when

learning IR commands. (See section: PROGRAMMING – IR.)

10. IR Programming/Zone 1 Control Keypad – This built-in K-22 keypad can be used for IR

command programming or for controlling Zone 1.

NOTE: The keypad on the front of the controller is parallel to a keypad connected to the Zone

1 terminal on the back panel, and both will control Zone 1. However, only the controller front

panel keypad can be used for programming.

11. Keypad Display – Backlit LCD displays source selected, volume setting and Group menu for

Zone 1.

12. Menu – Press to enter Controller Setup Menu for: Source and Zone Naming, Input level Trim,

Page/Mute Setup, Zone Sharing and to display firmware Version.

13. Enter (Navigation Array) – Five button cursor array used to navigate setup menu.

14. Zone ON/OFF LEDs – Illuminate blue to indicate active zones. These LEDs are visible

through windows on the removable front cover plate.

15. Keypad IR Window – IR sensor can be used to control Zone 1 with the R-1 Handheld

Remote.

Figure 2. C-6 Controller Rear Panel

Rear Panel

16. FM Antenna – One Female ‘F’ type terminal for connecting an appropriate 75ohm FM

antenna.

17. AM Antenna – One two wire spring clip allows connection of an AM Loop Antenna.

18. Mute – One 2.1mm coaxial jack mutes audio in selected zones as configured in Controller

Setup when 12VDC is present. Polarity: Pin = +12VDC; Sleeve = ground

19. Page – One 2.1mm coaxial jack switches all zones configured for ‘Page’ in Controller Setup

to associated Page Audio and Video jacks when 12VDC is present. Polarity: Polarity: Pin =

+12VDC; Sleeve = ground.

20. Page Audio – One RCA type input jack sends line level audio signal to any zone configured

for ‘Page’ in the Controller Setup when 12VDC is present on the PAGE jack.

21. Paging Video Input – One RCA type input jack sends composite video signal to any zone

configured for ‘Page’ in the Controller Setup when 12VDC is present on the PAGE jack.

22. Audio/Video Inputs – Five sets of RCA type input jacks for composite video and left and

right line level audio signals for up to five external source components.

23. Expansion Buss Terminal – 52 pin terminal distributes audio, video and control signals to

X-1 and X-2 Expansion Controllers for systems up to 18 zones.

24. AC Power – Standard IEC 3-conductor AC line cord receptacle.

25. AC Fuse – T8A L250

26. Main Power Switch – Turns AC power to the C-6 Controller ON/OFF.

27. Zone Keypad/Speaker Terminal – Six plug-in four terminal screw connector terminals for

connecting K-8, K-22 Keypads and speakers in remote zones.

WARNING: THESE ARE NOT TYPICAL SPEAKER TERMINALS. IMPROPER

CONNECTION OF SPEAKERS OR KEYPADS CAN CAUSE DAMAGE TO THE

CONTROLLER, THE KEYPADS AND SPEAKERS. SEE SECTIONS: ‘CONNECTING THE

CONTROLLER - ZONE CONNECTIONS’ AND ‘ZONE CONNECTIONS AND SETUP -

KEYPADS/SPEAKERS’ BEFORE MAKING ANY CONNECTIONS OR TURNING ON THE

MAIN POWER. NEXUS WARRANTY DOES NOT COVER DAMAGE CAUSED BY

IMPROPER CONNECTIONS.

28. Zone Video Output – Six RCA type jacks output composite video to each zone. Maximum

transmission distance: 150’ over RG6 quad shield cable.

29. All – One 3.5mm mini-phone jack outputs IR commands from all sources and all zones.

Polarity: Tip = signal; sleeve = ground.

30. IR – Five 3.5mm mini-phone jacks output routed IR commands to their specific corresponding

source components. Polarity: Tip = signal; sleeve = ground.

31. RS-232 - One DB9 connector provides two-way RS-232 communication with touch screen

controllers, and home automation systems. Pinout: Pin 2 = Tx; Pin 3 = Rx; Pin 5 = ground.

32. Feature Buss – One RJ45 jack, currently inactive, provides future control expansion and

capability. Periodically check www.nexusaudiosystems.com

for updates.

33. 12VDC Trigger Output – One, plug-in, two terminal screw connector, outputs 12VDC @

100mA when any zone is ON.

Figure 3. K-8 Keypad Figure 4. K-22 Keypad

Front Panel Front Panel

Figure 5. K-8 Keypad Figure 6. K-22 Keypad

Rear Panel Rear Panel

Keypad

Front (K-8 and K-22 Keypads)

34. Keypad LCD – Displays zone status for the selected source and volume. OFF when zone is

OFF.

35. Select Button – Press to scroll and select sources. No programming required.

36. Play Button – Press to play CD, DVD VCR etc. IR commands must be programmed by

source.

37. Function Buttons – Press to control transport functions such as: scan forward/reverse,

track/chapter skip, previous/next disc etc. IR commands must be programmed by source.

38. Volume UP/DOWN Buttons – Press and hold to adjust volume UP/DOWN by zone. No

programming required.

39. IR Sensor – Receives IR commands from R-1 Handheld Remote or other programmable

remote with R-1 codes to control C-6.

NOTE: C-6 will only respond to R-1 commands. There is no IR pass through to control

source components with their native remotes.

40. Next Button – Press to select next Tuner preset or other programmed function such as next

track, disc etc. NEXT Command is programmed at the factory. IR commands must be

programmed by source.

41. Zone ON/OFF Button – Press to toggle zone ON/OFF. Press and Hold to turn all zones

OFF. No programming required.

42. NOTE: The ON/OFF button can be programmed to automatically turn the common source

components ON when the first zone is turned ON and turn them OFF approximately 10

seconds after the last zone has been turned OFF. IR commands must be programmed by

source. See section: PROGRAMMING/IR/Power Management of Common Source

Components.

Front (K-22 Only)

42. Numeric Buttons – Press to select Tuner Presets, or programmed commands for direct

track or disc selection. These buttons can also be programmed for direct access tuning for

cable, satellite etc. These buttons are also used for selecting/deselecting zones in Group

Setup mode. TUNER PRESET Commands are programmed at the factory. IR commands

must be programmed by source.

43. Select Button – In addition to standard source select function, this button changes to the

next page of zones in Group Setup mode. No programming required.

44. +10 Button – Press for use with certain components with +10 command to create ‘11’ from

button presses of +10 & 1 for disc or track select, or station ‘105’ from button presses of +10

& 5 for some TVs. Program IR commands as needed by source.

45. Group Button – Press to enter Group Setup mode. Group Setup mode allows temporarily

‘linking’ zones together for simultaneous control of multiple zones for Source Selection and

Control. No programming required.

46. Disc Button – Press to select a specific disc when used with numeric buttons for disc

changers. IR commands must be programmed by source.

47. Track Button - Press to select a specific track when used with numeric buttons for disc

changers. IR commands must be programmed by source.

Rear (K-8 and K-22 Keypads)

48. Keypad/Speaker Input Terminal – One plug-in four terminal screw connectors for

connecting K-8, K-22 Keypads and speakers to appropriate zone connection on the C-6

Controller.

WARNING: THESE ARE NOT TYPICAL SPEAKER TERMINALS. IMPROPER

CONNECTION OF SPEAKERS OR KEYPADS CAN CAUSE DAMAGE TO THE

CONTROLLER, THE KEYPADS AND SPEAKERS. SEE SECTIONS: ‘CONNECTING THE

CONTROLLER - ZONE CONNECTIONS’ AND ‘ZONE CONNECTIONS AND SETUP -

KEYPADS/SPEAKERS’ BEFORE MAKING ANY CONNECTIONS OR TURNING ON THE

MAIN POWER. NEXUS WARRANTY DOES NOT COVER DAMAGE CAUSED BY

IMPROPER CONNECTIONS.

49. Speaker Output Terminal – One plug-in four terminal screw connectors for connecting

speakers to keypads.

Figure 7. R-1 Handheld Remote

R-1 Handheld Remote

NOTE 1: The C-6 Controller will only respond to R-1 IR codes. ‘System’ functions such as

ON/OFF, Volume, Source select are pre-programmed at the factory. ‘Source’ functions such

as track, disc, play, scan, numeric and navigation function commands must be programmed

into the C-6 Controller. See section: PROGRAMMING - IR. The R-1 commands can be

taught to other programmable controllers, but the source function commands must still be

programmed into the C-6 Controller.

NOTE 2: Any Source IR commands programmed into the C-6 Controller for the Keypads will

respond to button presses from the R-1 and do not need to be programmed twice.

50. Source Select Buttons - Press to select an Input on the C-6 Controller in a Zone. No

programming required.

51. Track Select Button – Press to select a specific track when used with numeric buttons for

disc changers. IR commands must be programmed by source.

52. Numeric Buttons - Press to select Tuner Presets, or programmed commands for direct track

or disc selection. These buttons can also be programmed for direct access tuning for cable,

satellite etc. Tuner Preset Commands are programmed at the factory. IR commands must be

programmed by source.

53. Navigation Buttons - Press to navigate menus for satellite, satellite radio, cable, music

servers, and disc changers. IR commands must be programmed by source.

54. Power ON/OFF Button - Press to toggle zone ON/OFF. Press and hold to turn all zones

OFF. No programming required.

55. Disc Select Button – Press to select a specific disc when used with numeric buttons for disc

changers. IR commands must be programmed by source.

56. Transport Buttons – Press to control source functions such as play, scan, skip etc. NEXT

button will select next Tuner Preset when Tuner is selected and can be programmed to select

next disc, track, channel etc. Must be programmed for any source other than Tuner.

57. Volume UP/DOWN Buttons – Press to adjust volume UP/DOWN by zone. No programming

required.

Figure 8. C-6 Typical System

DESIGNING AND INSTALLING A C-6 SYSTEM

System Design

It is always good to get as much information from the client/user/homeowner as possible when

designing a multi-source, multi-zone system. What sources are they going to use? How many

zones will be included in the system? Some zones may only require speakers for background

music, while other zones may include a TV or video display for movies, sports and news. It’s all

part of the same system and planning ahead will insure that the system does what the user

requires…or asks for later.

Head End Considerations

When planning a whole-house system, whether new or existing construction, always try to find

the most convenient location for the system components. Try to find a central location to pull the

wire runs with adequate space for the components and room to work on them. Certainly not the

least important consideration should be convenience for the user. Remember: once the system is

installed, the user is still going to need to load discs or tapes or program material…easy access is

essential. For service or upgrading components, an equipment closet with rear access to the

components is ideal but not always possible. Consider a pull-out rack mount system if rear

access is not possible. Leave plenty of extra wire to be able to easily remove components if they

should need service or replacing.

Zone Considerations

Think the system through in terms of how the system will be used. What is the layout of each

room? Where will the speakers go? Where will the keypads go? Are there going to be any other

system components in the remote zones such as TV’s? Be sure to pull all required cabling and

observe all local building and electrical codes.

INSTALLATION

Controller Location

The C-6 should be located at the main termination of all wire and cable runs. The source

components (CD, DVD, Satellite Receiver, VCR, etc) should also be installed at this location.

The C-6 and source components can be placed on shelves in a wall unit in a media room, or rack

mounted in a standard 19” rack mount system. Always provide convenient access for loading

CDs and DVDs. Easy access for service should also be a consideration.

Ventilation

The C-6 must be placed in a location that allows adequate airflow. Leave at least two inches

above and below the unit to allow air to flow freely through the vent holes on the top, bottom and

sides. Blocking the vent holes can inhibit airflow and possibly damage the unit. Removing the feet

will inhibit airflow and is not recommended. Additionally, care should be taken in to leave plenty of

extra room for wires and cables. Extra wire cramped in around the unit can block side vents and

inhibit proper airflow.

Rack Mounting

Figure 9. VP-1 Vent Panel

When rack mounting the C-6 Controller and other system components, it is recommended that

one Nexus VP-1 Vent Panel be used above and below the C-6 Controller to provide adequate

airflow for cooling. If X-1 and X-2 Expansion Controllers are being used, a VP-1 between each

component is recommended.

Keypad Location & Mounting

The K-8 and K-22 Keypads should never be mounted in the same J-box with AC house wiring or

any other high voltage device such as a light switch. Avoid mounting the keypads in areas with

high moisture such as around sinks, bathtubs, showers or outdoor locations that will be exposed

to rain or high humidity. Care should also be taken to avoid mounting the keypads in locations

that will be exposed to direct sunlight. Sunlight can interfere with the IR sensors on the keypads

and interfere with system performance.

WIRING

One of the most important aspects of system design and installation is the wiring infrastructure.

The Nexus C-6 Phantom Control Circuitry provides installation options far beyond typical multi-

room system controller capabilities. Simply put, the Phantom Control feature allows utilizing

existing speaker wires for both the speaker level audio signals and control signals by combining

speaker level audio, control signals and power for the keypads on the same four-conductor wire

that is typically used for just speaker level audio. What this means is that the C-6 Controller with

K-8 or K-22 Keypads can be used to upgrade an existing single-zone audio system with volume

controls to a multi-source, multi-zone Keypad controlled A/V distribution system.

Phantom Control increases the flexibility of the C-6 System to just about any application, but extra

care should be taken in tracing and labeling wires in both new and existing construction

installations. Pay careful attention to the wiring diagrams in this manual and to the markings on

the components to avoid wiring errors that can potentially damage the system components.

WARNING: THESE ARE NOT TYPICAL SPEAKER TERMINALS. IMPROPER CONNECTION

OF SPEAKERS OR KEYPADS CAN CAUSE DAMAGE TO THE CONTROLLER, THE KEYPADS

AND SPEAKERS. CHECK ALL CONNECTIONS BEFORE TURNING ON THE MAIN POWER.

NEXUS WARRANTY DOES NOT COVER DAMAGE CAUSED BY IMPROPER CONNECTIONS.

When planning the wiring infrastructure, always pull extra wire. In new construction, wires can be

damaged during construction, so it is a good idea to use wire with additional conductors in case a

nail or staple gets run through a wire. Additionally, even though the system has been designed

and contracted based on extensive interviews with the homeowner, things change. The

homeowner may decide to add music, video and control to additional rooms long after the walls

have been sealed up. In new construction, always pull wire to every room that could ever possibly

be added to the system, so when the homeowner decides to add a room, the wire is already in

place. Pull speaker/control wire for audio and control as well as coax for video distribution. Pull

each wire or cable to an appropriate location for keypads, speakers and video displays.

Terminate with appropriate wall plates or keep a map detailing exactly where the wire runs are

terminated in the walls. Always label the wire runs by room and device to assist in installation and

troubleshooting.

Figure 10. Typical Zone Configuration

Zone Wiring

Keypads/Speakers - Pull four conductor wire in home-runs directly from each keypad location to

the C-6 Controller location. Pull two conductor wire of the same gauge from the keypad location

to each of the speakers in a zone. 16AWG stranded up to 75’; 14AWG stranded up to 100’. Non-

shielded preferred.

NOTE: Min load: 8 ohms per zone. Do not load more than one pair of 8 ohm speakers per zone.

This can cause the unit to go into protection and may possibly blow fuses.

Video – Pull in home runs directly from each possible TV or video display location directly to the

C-6 Controller location. RG6 quad shield preferred. Up to 150’. Terminate with quality gold plated

RCA type male plugs.

Paging

Audio – Use a quality audio cable from the telephone system line audio or paging output to the

Page Audio IN on the C-6 Controller. Line level audio can typically be run up to about 50’.

Anything beyond that should be run through an appropriate balanced line adaptor. Terminate with

a quality gold plated RCA type male plug at the head end and terminate as appropriate for the

paging device used.

Video – Pull RG6 quad shield from device (front door camera, etc.) to be displayed in Page mode

to the C-6 Controller location. If device is local to the controller, an appropriate video patch cable

is acceptable. RG6 quad shield up to about 150’. Terminate with a quality gold plated RCA type

male plug at head end and with connector appropriate to the Page video device to be displayed.

Mute – Pull two conductor stranded wire from the 12VDC output on the device that will trigger

zone muting to the C-6 Controller location. Terminate with a 2.1mm coaxial plug at head end. Pin

= +12VDC, sleeve = ground. 20AWG up to 500’; 18AWG up to 1000’. Non-shielded preferred.

NOTE: Zone mute function must be configured in the C-6 System Setup. See section:

PROGRAMMING – Page/Mute.

Page - Pull two conductor stranded wire from the 12VDC output on the device that will trigger

paging to the C-6 Controller location. Terminate with a 2.1mm coaxial plug at head end. Pin =

+12VDC, sleeve = ground. 20AWG up to 500’; 18AWG up to 1000’. Non-shielded preferred.

NOTE: Paging function must be configured in the C-6 System Setup. See section:

PROGRAMMING – Page/Mute

RS-232 – RS-232 though capable of communicating complex control strings has limitations in its

overall transmission length. Typically RS-232 runs should be limited to about 50’. The cable is a

nine conductor cable terminated with a DB9 connector. A finished cable of appropriate length is

recommended for this application. DB9 Serial cable. Pin out: Pin 2=Tx, Pin3=Rx, Pin 5=GND.

Feature Buss – This port is currently inactive. It will provide future control expansion and

capability. Periodically visit www.nexusaudiosystems.com

for updates.

Trigger – Pull two conductor stranded wire to a voltage sensing device to be controlled by the C-

6. Terminate with the included two terminal plug-in screw connector at the head end. Terminate

as appropriate for device to be controlled. 20AWG up to 500’; 18AWG up to 1000’. Non-shielded

preferred.

CONNECTING THE CONTROLLER

When connecting source components, or making any connections, be sure that the C-6 Controller

and all system devices are turned OFF and disconnected from AC power to prevent electrical

shock and to avoid possibly damaging components.

Source Components

Audio/Video – Use one quality RCA to RCA type audio/video cable with gold plated connectors

for each A/V source component. Use a stereo cable if the source is audio only. Connect the LEFT

and RIGHT audio outputs and COMPOSITE VIDEO output of each source component to the

LEFT and RIGHT audio inputs and COMPOSITE VIDEO inputs on the C-6 Controller for sources

1-5.

Zone Connections

Keypads/Speakers

As described in the section on Wiring, the Speaker/Keypad Terminals are specially configured for

Phantom Control that combines speaker level audio signals, keypad control signals and power for

the keypads all on the same wire. Special care must be used in making the Speaker/Keypad

connections.

1. Using four conductor stranded wire, strip approximately ¼” of insulation from each conductor.

Twist the strands until tight.

2. Connect the bare wires to the plug-in four terminal screw connectors included with the C-6

accessories. Be sure to maintain proper polarity from the RIGHT+, CONTROL, COMMON and

+LEFT terminals for each zone output. Be sure there are no loose strands sticking out that

could cause a short.

Video

Connect Zone Video Out to quad shield coaxial cable for any zone with a TV or video display.

Tuner

Antennas

FM 75 OHM– Use the included 75 ohm antenna. Connect to the 75 ohm F-type FM Antenna

terminal. Spread the ‘arms’ of the antenna and attach as high as possible on the back of a wall

unit or equipment rack as possible for best reception.

AM – Use the included AM loop antenna. Connect to the AM Antenna two position spring clip

terminal. Polarity is not critical. Position as needed for best reception.

IR Emitters

Sources 1-5 – Use any standard IR emitter with a 3.5mm mini-phone plug for each source

component. Plug emitters into appropriate source IR output jack for sources 1-5. (If the CD player

is source 1, plug the emitter for the CD player into the emitter jack for source 1.) Polarity: Tip =

signal; sleeve = ground.

NOTE 1: IR outputs 1-5 are routed IR outputs. When source 1 is selected, only the emitter

connected to IR 1 out will flash.

NOTE 2: IR emitters are available as infrared (no flash) or visible/infrared (red flash). Either will

work. The visible/infrared emitters are recommended in that they give a visual confirmation of IR

output and can be helpful when troubleshooting.

All – Use any standard IR emitter with 3.5mm mini-phone plug to control a single common

device. (IR controlled lights, drapes, lifts, screens etc.) If there is more than one common device,

use a 3.5mm mini-phone plug with pig tail to connect to the IR and ground input terminals on an

amplified IR connecting block to drive additional emitters. Polarity: Tip = signal; sleeve = ground.

NOTE: The ALL IR output will output IR when any keypad or R-1 button programmed with an IR

command is pressed for any source in any zone.

Paging

The C-6 PAGE feature allows several options depending upon the particular system setup. The

Page feature utilizes the MUTE, PAGE, VIDEO and AUDIO inputs grouped on the back panel of

the controller. The paging function also requires some configuration in the Controller Setup Menu.

Some suggested paging options are:

1. Use the 12VDC MUTE Input to mute zone audio as configured in the Controller Setup Menu,

triggered by a 12V input from a device such as a doorbell or telephone system.

2. Use the 12VDC PAGE Input to switch zones to the Page Audio input as configured in the

Controller Setup Menu to allow whole house paging through the speakers connected to the C-6

Controller using a telephone system with a line level audio output.

3. Use the 12VDC PAGE Input to switch zones to the Page Video input as configured in the

Controller Setup Menu to show a front door security camera when triggered by 12VDC from a

doorbell.

4. Use the 12VDC PAGE Input to switch classrooms or offices to a microphone and camera to be

used by a school principal or corporate executive to address students or employees.

Audio – Connect one RCA to RCA mono audio cable from a line level audio output on the

telephone system or device to be used for paging to the PAGE AUDIO IN on the C-6 Controller.

Video – Connect one RCA to RCA shielded video cable from a composite video output from a

security camera or other video device to be displayed in PAGE mode to the PAGE VIDEO IN on

the C-6 Controller.

Mute – Connect one 2.1mm coaxial plug from the mute jack on the C-6 to the control voltage

output terminal of the device to be used to trigger page mute. Be sure to maintain proper polarity

from the +12V and Ground terminals on the control out to the 2.1mm coaxial plug. Polarity: Pin =

+12VDC, sleeve = ground.

Page – Connect one 2.1mm coaxial plug from the page jack on the C-6 to the control voltage

output terminal of the device to be used to trigger page audio/video. Be sure to maintain proper

polarity from the +12V and Ground terminals on the control out to the 2.1mm coaxial plug.

Polarity: Pin = +12VDC, sleeve = ground.

RS-232

Connect and secure one DB9 cable to the RS-232 port on the C-6 and to the appropriate RS-232

port on the control device. DB9 Pinout: Pin 2: Tx (Transmit), Pin 3: Rx (Receive), Pin 5: GND

(Ground). See section: RS-232 Protocol for additional information.

Trigger

The Trigger terminal outputs 12VDC @ 100mA when any zone on the C-6 Controller, X-1 or X-2

Expansion Controllers is ON. This control voltage can be used to trigger voltage controlled lifts,

screens, drapes or switched AC outlets.

1. Using two conductor wire, strip approximately ¼” of insulation from each conductor. Twist the

strands until tight.

2. Connect the bare wire to the plug-in two terminal screw connector included with the C-6

accessories. Be sure to maintain proper polarity from the + (+12VDC) and – (ground) terminals

on the Trigger output when connecting to the device to be switched. Be sure there are no loose

strands sticking out that could cause a short.

Feature Buss

The Feature Buss is an RJ45 jack that is currently inactive. It will be utilized to provide additional

control flexibility in the future. Periodically visit www.nexusaudiosystems.com

for updates.

Figure 11. C-6 Expanded System

Multiple C-6 Controllers

The Nexus C-6 System is expandable to up to 18 Zones. There are two Expansion Controllers

that are used for expansion. The X-1 expands a C-6 system for zones 7-12 and the X-2 expands

the system for zones 13-18.

Audio, Video and Control signals as well as System information such as ‘Group’ data are all

transmitted via a 52 pin ribbon cable making expansion easy without having to make additional

A/V and control connections.

Once programming and setup have been done in the C-6 Controller for Tuner setup, IR

commands, Source Naming and Input Trim they become universal to the system regardless of

the number of zones. The only additional steps required when adding Expansion Controllers are

Zone Naming, and configuring the added zones for Zone Mute and Paging.

Expanding Zones 7-12

Connect one end of the 52 pin ribbon cable included with the X-1 Expansion Controller to the

LOWER 50 pin Expansion Buss Port on the X-1. Connect the other end of the ribbon cable to the

Expansion Buss Port on the C-6 Controller. Make Keypad/Speaker connections and Video

connections as described in ZONE CONNECTIONS AND SETUP below.

Expanding Zones 13-18

Connect one end of the 52 pin ribbon cable included with the X-2 Expansion Controller to the

UPPER 50 pin Expansion Buss Port on the X-1. Connect the other end of the ribbon cable to the

Expansion Buss Port on the X-2 Controller. Make Keypad/Speaker connections and Video

connections as described in ZONE CONNECTIONS AND SETUP below.

Right Speaker

Control

Common

Left Speaker

C-6 Zone Out

Out

Keypad

Figure 12. Typical Zone Keypad Wiring

ZONE CONNECTIONS AND SETUP

Keypads

As described in the section on Wiring, the Speaker/Keypad Terminals are specially configured for

Phantom Control that combines speaker level audio signals, keypad control signals and power for

the keypads all on the same wire. Special care must be used in making the Speaker/Keypad

connections.

1. Using four conductor stranded wire, strip approximately ¼” of insulation from each conductor.

Twist the strands until tight.

2. Connect the bare wires to the plug-in four terminal screw connectors included with the C-6

accessories. Be sure to maintain proper polarity on the LEFT+, CONTROL, COMMON and

RIGHT+ terminals for each zone output. Be sure there are no loose strands sticking out that

could cause a short.

3. Plug connector into the Speaker/Keypad Input terminal on the back of the Keypad. Repeat for

all zones.

Speakers

The Speaker Output Terminals output speaker level audio only and use a standard speaker

connection configuration.

1. Using two conductor stranded wire, strip approximately ¼” of insulation from each conductor.

Twist the strands until tight.

2. Connect the bare wires to the plug-in four terminal screw connectors included with the C-6

accessories. Be sure to maintain proper polarity from the L+, L-, R- and R+ terminals for each

speaker pair output. Be sure there are no loose strands sticking out that could cause a short.

3. Plug connector into the Speaker Output terminal on the back of the Keypad. Repeat for all

zones.

Video

Connect the RG6 quad shield coax to a composite video input on the TV or video display. Repeat

for all zones.

PROGRAMMING

C-6 Controller Setup Menu

All system programming is done in the C-6 Controller using the C-6 Controller Setup Menu. No

PC, no software. Other than ‘Group’ and zone treble, mid and bass adjustments, once the

Controller has been programmed, the entire system is ready to go. If the system starts out in a

six-zone configuration using a single C-6 Controller and the homeowner decides to add zones at

a later date, other than adding zone names and setting the zone tone controls, all programming

will already be done!

The Controller Setup Memory is non-volatile so even if the power goes out, the system should not

need reprogramming.

The system setup should always be done prior to taking the system components to the job site.

This will assure that all components are functioning properly. Setting the system up in the shop

will also serve well to prevent overlooking the need for certain parts, pieces, connectors, emitters

etc. This will save time at the job site and help portray an image of professionalism to the client.

Tuner

There are ten Tuner preset memory locations. They can be any combination of AM and FM

stations. The stored band and frequency presets will appear on the Keypad LCDs when Tuner is

selected. To store Tuner Presets:

1. Select TUNER PRESET 1.

2. Press the AM·FM button to select band.

3. Press the MONO·STEREO button to select mode on the Controller Display.

4. Press the SEEK·TUNE button to select TUNE mode on the Controller Display.

5. Use the TUNE UP/DOWN buttons to select tuner frequency e.g. FM 94.7.

6. Press and hold TUNER PRESET 1 for 3 seconds or until P1 appears in the upper left corner of

the Controller Display.

7. Repeat steps 1-6 for Tuner Presets 2-10.

Source Naming

The C-6 provides a simple yet unlimited method of identifying the system source components.

The Tuner input is pre-programmed at the factory. Inputs 1-5 will default to: INPUT 1, INPUT 2

etc until the sources have been named in the Setup Menu. Inputs 1-5 have 40 pre-programmed

source name options such as: CD, DVD, SAT, SKIP, XMRADIO, etc. If you name a source SKIP

that input will be ignored and will sequence to the next input. If a particular source name is not

included in the pre-programmed options, new names can be added. The stored source names

will appear on the Keypad Displays as the inputs are selected from the Keypads or Remote. To

store Source Names:

1. Press MENU to enter the Setup Menu. SOURCE NAMING will appear on the Controller

Display. If the menu cursor (►) appears to the left of Source Naming, Press ENTER. The

Display will change to the Source Naming Window. If ► does not appear next to Source

Naming, use the ▲ button on the Navigation Array to scroll through the menu options to Source

Naming. When ► appears to the left of Source Naming, Press ENTER. The Display will change

to the Source Naming Window.

2. Since Tuner is already set as a system default, with the Programming Brackets [] under INPUT,

[Tun], PRESS ▲ on the Navigation Array. INPUT will change to: [1]. This indicates Input 1 is

ready to be named.

3. Press ► on the Navigation Array. The Programming Brackets [] will move to the PRESET

position.

4. Press ▲ and ▼ on the Navigation Array to scroll through the pre-programmed Source Names.

5. Press ENTER when the desired Source Name appears on the Display under NAME. e.g. CD.

‘NAME SAVED’ will appear on the Display for a couple seconds. The Display will return to the

Source Naming Window with INPUT [1] now NAMEd as CD. (PRESET will always return to

[00].)

6. If a particular source name does not appear in the presets, source names can be added by

replacing preset names that will not be used. Example: Name INPUT 3, SERVER. To change a

preset name:

a)In the Source Naming Window, select INPUT [3].

b)Press ▲ and ▼ to scroll through the presets and stop on a source name that will not be

used. (CD 3)

c) Pr ess ► to position the cursor, which will now change to an underscore (_) under the ‘C’.

d)Press ▲ and ▼ to scroll through letters A-Z, numbers 0-9 and one blank space and stop on

the desired character. To change ‘CD 3’ to ‘SERVER’ stop on ‘S’.

e)Press ► to position the cursor under the next letter and repeat step d.

f) Repeat steps d-e to create a new name up to seven characters long.

g)Press ENTER. ‘NAME SAVED’ will appear on the Display for a couple seconds. The Display

will return to the Source Naming Window with INPUT [3] now NAMEd as SERVER.

7. Repeat steps 2-6 for sources 2-5.

8. When all Inputs have been named, press MENU. UPDATING KEYPADS will appear on the

Display for a few seconds. The Display will return to the default Tuner Preset Window.

9. Using the SELECT button on any keypad, scroll through the inputs to confirm programming.

Make corrections as necessary.

10. Check all Keypads to confirm Update.

Zone Naming

The individual zones can be named to assist with the ‘Group’ function to temporarily link zones

together when using K-22 Keypads. It is sometimes desirable to be able to control adjacent

rooms or set up a party mode for whole house control and turn multiple zones ON/OFF, select

sources and adjust volume from any of the zones in the group. The process of grouping zones is

much easier when the zones are identified by name rather than trying to guess which room is

Zone 3 or Zone 18. There are 39 Pre-programmed zone name options such as: Kitchen, Master

Bedroom, Atrium, etc. If a particular zone name is not included in the pre-programmed options,

new names can be added. The stored zone names will appear on the K-22 Keypad Displays

when using the GROUP function menu. To name zones:

1. Press MENU to enter the Setup Menu. ZONE NAMING will appear on the Controller Display. If

the menu cursor (►) appears to the left of Source Naming, Press ENTER. The Display will

change to the Zone Naming Window. If ► does not appear next to Zone Naming, use the ▼

button on the Navigation Array to scroll through the menu options to Zone Naming. When ►

appears to the left of Zone Naming, Press ENTER. The Display will change to the Zone Naming

Window.

2. The Zone Naming Window will default to ZONE [1]. Press ► in the Navigation Array. The

Programming Brackets [] will move to PRESET [00].

3. Press ▲ and ▼ in the Navigation Array to scroll through the pre-programmed zone names.

4. Press ENTER when the desired Zone Name appears on the Display next to NAME. E.g.

ATRIUM. ‘NAME SAVED’ will appear on the Display for a couple seconds. The Display will

return to the Zone Naming Window with ZONE [1] now NAMEd as ATRIUM. (PRESET will

always return to [00].)

5. If a particular zone name does not appear in the presets, zone names can be added by

replacing preset names that will not be used. Example: Name Zone 3, ENTRY. To change a

preset name:

a)In the Zone Naming Window, select ZONE [3].

b)Press ▲ and ▼ to scroll through the presets and stop on a zone name that will not be used.

(KITCHEN 2)

c) Pr ess ► to position the cursor, which will now change to an underscore (_) under the ‘K’.

d)Press ▲ and ▼ to scroll through letters A-Z, numbers 0-9 and one blank space and stop on

the desired character. To change ‘KITCHEN 2’ to ‘ENTRY’ stop on ‘E’.

e)Press ► to position the cursor under the next letter and repeat step d.

f) Repeat steps d-e to create a new name up to thirteen characters long. Use the blank space

to delete characters left over from the original preset name if necessary.

6. Press ENTER. ‘NAME SAVED’ will appear on the Display for a couple seconds. The Display

will return to the Zone Naming Window with ZONE [3] now NAMEd as ENTRY.

7. Repeat steps 2-6 for zones 2-18 as needed.

8. When all Inputs have been named, press MENU. UPDATING KEYPADS will appear on the

Display for a few seconds. The Display will return to the default Tuner Preset Window.

9. Use the GROUP and SELECT buttons on any K-22 Keypad to scroll through the Zone Group

Menu to confirm programming. Make corrections as necessary.

10. Check all K-22 Keypads to confirm Update.

Input Level Trim

Different source components can have different output levels. When switching inputs, this will

cause some sources to sound louder than others. The Input Level Trim feature provides a

method of ‘balancing’ the relative loudness of the different sources. Each input can be attenuated

up to 15db in 1db increments from unity gain.

To properly adjust trim, all sources must be connected to their appropriate inputs on the C-6

Controller. They must all be loaded with program material (Radio station, CD, DVD, Video Tape

etc.) and playing. When selecting program material, choose material with similar characteristics.

That is, don’t have the Tuner set to an easy listening station while the CD player is playing high

octane shred metal. Consider also the dynamics of movies from DVD and Satellite where the

sound track can range from low level dialogue to sound of jet engines and explosions. To set

Input Level Trim:

1. Load and play all sources as recommended above.

2. Press SELECT on the Programming Keypad to cycle through all inputs. Make a mental note of

which sources are ‘louder’ than others.

3. Press MENU to enter the Setup Menu. INPUT LEVEL TRIM will be listed in the menu options.

Press ▼ on the Navigation Array to scroll through the menu options to Input Level Trim. When

► appears to the left of Input Level Trim, Press ENTER. The Display will change to the Input

Level Trim Window.

4. The Input Level Trim Window will default to [TUNER].

5. Press ► in the Navigation Array. The Programming Brackets [] will move to LEVEL: [0dB].

6. Press ▲ and ▼ in the Navigation Array to adjust the input level as needed.

NOTE: Input Level Trim adjustments cannot be monitored while in Setup Menu. The settings

must be stored and the Controller must be in a normal use mode to cycle through the inputs to

monitor changes in Input Trim Levels.

7. Press ◄ or ► to return the programming brackets to [TUNER] (or current input).

8. Press ▲ or ▼ to navigate to the previous or next input.

9. Repeat steps 5-8 for Inputs 1-5.

10. Press ENTER when the desired trim levels have been set. ‘SETTINGS SAVED’ will appear

on the Display for a couple seconds. The Display will return to the Setup Menu with Input Level

Trims adjusted.

11. Using the SELECT button on any keypad, scroll through the sources to confirm equal relative

audio levels from all sources. Adjust as needed.

12. Press MENU to return to the default Tuner Preset Window.

Page/Mute

The C-6 can be used for whole-house paging when used with an appropriately featured

telephone system or microphone preamp having a line level audio output and 12VDC control

output. It also has a zone mute function that can be used to mute selected zones with a 12VDC

control input. Both features, Page and Mute have a variable timeout of 1-60 seconds, to set how

long the selected source will be interrupted when triggered by a 12VDC pulse. To program Page

and Mute functions:

1. Press MENU to enter the Setup Menu. PAGE/MUTE SETUP will be listed in the menu options.

Use ▼ on the Navigation Array to scroll through the menu options to Page/Mute Setup. When

► appears to the left of Page/Mute Setup, Press ENTER. The Display will change to the

Page/Mute Setup Window.

2. The Page/Mute Setup Window will default to [ZONE 1].

3. Press ► in the Navigation Array. The Programming Brackets [] will move to MUTE [N]. (All

zones default to [N] or no zone mute.)

4. Press ▲ or ▼ in the Navigation Array to change zone mute status to [Y] (allow zone mute) as

desired.

5. Press ► to advance the programming brackets to Pg.[N] (All zones default to [N] or no zone

paging.)

6. Press ▲ or ▼ in the Navigation Array to change zone page status to [Y] (allow paging) as

desired.

7. Press ◄ to return to the [SELECTED ZONE].

8. Press ▲ or ▼ to navigate to the previous or next [ZONE].

9. Repeat steps 3-6 for all zones as needed.

10. Press ENTER when MUTE and PAGE have been configured for all active zones. A new

window will appear on the Display showing: PAGE TIMEOUT: [10] Sec and MUTE TIMEOUT:

[10] Sec. (All zones default to 10 seconds for both functions. If [N] is selected for either function in

any zone, the function will be inactive for that zone.)

11. Press ▲ or ▼ to adjust the PAGE TIMEOUT. (Page timeout can be set from 1-60 seconds.)

The timeout setting will affect all zones set for paging.

NOTE: Page timeout can be used to convert a 12V pulse to a page timeout up to 60 seconds. A

constant voltage will ‘hold’ the page function as long as voltage is present on the PAGE terminal.

For constant voltage, set page timeout to 0 seconds or additional seconds will be added to page

timeout after the voltage has been removed.

12. Press ► to advance the Programming Brackets to set MUTE TIMEOUT duration.

13. Press ▲ or ▼ to adjust the MUTE TIMEOUT. (Mute timeout can be set from 1-60 seconds.)

The timeout setting will affect all zones set for mute.

NOTE: Mute can be used to convert a 12V pulse to a zone mute up to 60 seconds. A constant

voltage will ‘hold’ the mute function as long as voltage is present on the MUTE terminal. For

constant voltage, set mute timeout to 0 seconds or additional seconds will be added to mute

timeout after the voltage has been removed.

14. Press ENTER. SETTINGS SAVED will appear on the display for a few seconds. The Display

will switch to the Setup Menu.

15. Press Menu to return to the default Tuner Preset Window.

Zone Sharing

There are two modes for linking zones with the C-6. One is GROUP and the other is ZONE

SHARING. Group is a temporary linking of active zones by source and volume. Zone Sharing has

two options. One, volume/power follows [Y], permanently links up to three zones by power,

source and volume in the System Setup. The second, volume/power follows [N] permanently links

up to three zones but only by source when active. To program Zone Sharing:

1. Press MENU to enter the Setup Menu. ZONE SHARING will be listed in the menu options. Use

▼ in the Navigation Array to scroll through the menu options to Zone Sharing Setup. When ►

appears to the left of Zone Sharing Setup, Press ENTER. The Display will change to the Zone

Sharing Setup Window.

2. The Zone Sharing Setup Window will default to: ZONES: [00] 00 00.

3. Press ▲ in the Navigation Array to select the FIRST ZONE to be linked.

4. Press ► to advance the Programming Brackets [] to 00 (the next zone to be linked).

5. Press ▲ or ▼ in the Navigation Array to select the SECOND ZONE to be linked.

6. Press ► to advance the Programming Brackets to 00 (the next zone to be linked).

7. Press ▲ or ▼ in the Navigation Array to select the THIRD ZONE to be linked.

8. Press ► to advance the Programming Brackets to Vol/Pwr Follows? [N]. (Default is source link

only.)

9. Press ▲ or ▼ to select Vol/Pwr Follows? [Y] if desired. (Links power, source and volume.)

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Nexus C-6 Installation Instructions Manual

Brand: Nexus

Model: C-6

Category: Audio amplifiers

Type: Installation Instructions Manual

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Nexus C-6 Installation Instructions Manual

Nexus C-6 Installation Instructions Manual

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