Unika PS-4000 User manual

Brand: Unika

Model: PS-4000

Category: Musical Equipment

Type: User manual

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Manual

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PS Series Amplifier

PS-5000 PS-4000 PS-3000

Professional Amplifiers

for Live Sound

UNiKA

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Professional Amplifiers

for Live Sound

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UNiKA

INTRODUCTION

Congratulations on purchasing a UNiKA PS Power Amplifier. This state of the art pow-

er amplifier includes the latest features and is backed by a three year limited warranty.

Prior to use, we suggest that you carefully read all the instructions.

FEATURES

State of the art technology provides exceptional reliability when working with

difficult speakers with up to 2 ohm impedance.

Excellent handling of low frequencies as well as clear mid and flawless highs.

High output power to drive professional loudspeakers without clipping.

Oversized toroidal transformer, filter and heat sinks for better low end,

transparency and stability.

Comprehensive protection circuitry (short, overheat, DC, subsonic and, RF filters,

turn-on delay) with high current speaker protection relays.

Three modes of operation STEREO. PARALLEL MONO. and MONO BRIDGE,

with mode status indication LEDs on front panel.

Flexible input configuration with active balanced inputs, additional input connec-

tors to chain amps.

True clip LEDs for better control.

Front-to-Rear airflow with 2 speed fan control.

Efficient aluminum extrusion heat sink design for thermal stability and reliability.

Turn-on in-rush current limiting circuitry.

Compact 3U well balanced enclosure.

Steel reinforced chassis construction for durability and longevity.

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SETUP

Unpack Your Amplifier

Please unpack and inspect your amplifier for any damage that may have occurred

during transit. If damage is found, notify the transportation company immediately.

Only you can initiate a claim for shipping damage. UNiKA will be happy to help as

needed. Save the shipping carton as evidence of damage for the shipper’s inspection.

We also recommend that you save all packing materials so you will have them if you

ever need to transport the unit. Never ship the unit without the factory pack.

YOU WILL NEED (not supplied):

Input wiring cables

Output wiring cables

Rack for mounting amplifier (or a stable surface for stacking)

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Install Your Amplifier

CAUTION

Before you begin, make sure your amplifier is disconnected from the power source,

with power switch in the “off” position and all level controls turned completely down

(counter clockwise).

Use a standard 19-inch (48.3 cm) equipment rack. You may also stack amps without

using a cabinet.

NOTE

When transporting, amplifiers should be supported at both front and back.

Ensure Proper Cooling

When using an equipment rack, mount units directly on top of each other. Close any

open spaces in rack with blank panels. DO NOT block front or rear air vents. The side

walls of the rack should be a minimum of two inches (5.1 cm) away from the amplifier

sides, and the back of the rack should be a minimum of four inches (10.2 cm) from

the amplifier back panel.

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CAUTIONS

Read all operating instructions before using this equipment.

To reduce the risk of electrical shock, do not open the unit.

There is NO USER REPLACEABLE PARTS INSIDE. Please contact the UNiKA Ser-

vice Department or your authorized dealer to speak to a qualified service technician.

Be sure to allow adequate front and rear ventilation to avoid possible heat damage to

you equipment.

Be sure that AC power is OFF and all level controls are set to MINIMUM before mak-

ing connections. This will eliminate any chance of unexpected, loud audio transients

that could damage your speaker systems.

Be sure that AC power is OFF when changing modes of operation and when changing

the position of the ground lift switch.

DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. Operators of electronic

equipment should in no way be in contact with water.

When connecting to AC power line, be sure you haven't lost the ground connection by

using an adapter or extension cord without a 3 prong plug.

Note:

DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY CONTROLS OR

SWITCHES.

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CONNECTIONS, CONTROLS AND INDICATORS

Rear Panel

Input section

There are two parallel input connectors (one female XLR and one male) per channel.

Either can be used as an input or as a link to chain amplifiers.

XLR Input Jacks 1

Electronically balanced inputs accept a standard XLR connector.

Pin 1 = shield/ ground, Pin 2 = hot or positive (+) and Pin 3 =cold or negative (-).

Operation Mode Switch2

Switch is used to set the unit for Parallel mode, Stereo mode and Mono Bridge

mode.

Gain switch3

Ps series amplifiers let you select different input sensitivities, respectively three

different voltage gains. The switch settings are 26db voltage gain, 32db voltage

gain and 1.4v input sensitivity,

Limiter switch4

In some applications it may be necessary to switch off the built in peak limiter.

In normal use, with limiters, the distortion is less than 0.5% even when the Clip

LED is flashing.

If the loudspeaker system or a pre connected controller allows the use of an

amplifier with more than 0.5% THD you can switch off the limiter. In this case

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you should be aware that the parameter curve at clip level is very steep and you will

have only a small improvement of the usable signal, but a strong increase of distortion.

Ground lift switch 5

It’s used to lift the balanced input connectors' ground/shield from the amp-

lifier's ground. When the signal ground lifted.

The sound source disconnects from the amplifier's ground preventing ground

loops which can generate hum and noise. See the Signal Ground Lift Switch

instructions for more detail.

Speaker Outputs 6

Connectors are provided to connect speakers to the amplifier quickly and eas-

ily. They are high current rated and provide very stable and durable contacts.

A third Speakon connector in the center is provided to be used if the amplifier

is in the Mono Bridge mode. Every Speakon connector has Pin 1+ as positive

and Pin 1- as negative.

Note

Total speaker impedance must not be lower than 2 ohm pre channel for stereo and

parallel mono modes or 4 ohm for mono bridge mode.

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Front Panel

Power Switch7

Turns the unit on and off.

Power LED8

When you have switched on the amplifier channels, the ON LED indicates

the power is being supplied to the channel.

If no of the LED's light up once the appliance has been switched on, this might

be due to the following fault: no power supply from the mains outlet.

Please check that the appliance has been plugged in properly and check that

power is being supplied from the mains outlet. If so, but the LED's still have not

lit up.

Parallel LED9

The parallel LED will light when you have set the rear panel MODE SWITCH

2for parallel mono operation. Always make sure that this switch is in the

correct position and that all speaker connections have been made correctly for

the mode of operation you wish to use before powering up the amplifier.

Stereo LED10

The stereo LED will light when you have set the rear panel MODE SWITCH2

for stereo operation. Always make sure that this switch is in the correct position

and that all speaker connections have been made correctly for the mode of

operation you wish to use before powering up the amplifier.

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Bridge LED11

The bridge LED will light when you have set the rear panel MODE SWITCH

2for mono bridge operation. Always mark sure that this switch is in the

correct position and that all speaker connections have been made correctly for

the mode of operation you wish to use before powering up the amplifier.

Signal LED12

The signal LED indicates a -30db point relative to the clipping point, regardless

of the mains voltage and the connected load. This LED gives the user a better

control of the remaining headroom of a channel or a complete system.

Clip LED13

The clip LED indicates the exact clipping point, regardless of the mains voltage

and or the connected load.

The symmetrical supply voltages of the power pack of an amplifier limit its out-

put power. If amplifier is overdriven by a too high input signal, the output signal

tries to exceed the value of the supply voltage. At this moment, the amplifiers

'clip'. this results in a dangerous situation for the connected loudspeakers. The

peak limiter, if switched on, intervenes here by automatically limiting the output

signal-this is indicated by the clip led of the channel in question.

Level controls14

Establish the input levels required for each channel. only the channel 1 level

control14works in mono Bridge mode.

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OPERATING INSTRUCTIONS

The amplifier's power must be turned off when changing modes of operation.

Stereo Operation

The unit has two channels for stereo operation. Each channel provides a separate and

discrete signal at the speaker outputs according to the signal received at the input.

The following instructions are for

applications with 8 Ohm, 4 Ohm or

2 Ohm speakers of matched power

rating.

1. With the power off, set the MODE

SWITCH2to the STEREO

position. When the power is on,

be sure the Stereo LED on the

front panel. If no, you have the switch in the wrong position. Correct it before contin-

uing.

2. With the power off, connect your input cables to the channel 1 and channel 2 inputs

using either the female XLR INPUT JACK1or male XLR INPUT JACK1of

each channel. The other channel 1 & channel 2 input can be used to link to an

additional amplifier.

3. Connect the loudspeakers to the channel 1 and channel 2 SPEAKERS OUTPUT

6 . THE TOTAL SPEAKER LOAD MUST BE AT LEAST 2 OHM PRE CHANNEL.

If you try to operate at a lower impedance, the amplifier will go into protection mode

and stop operation until you correct the load conditions.

4. With the LEVEL CONTROLS14of both channels set to zero fully counterclo-

ckwise, turn the POWER SWITCH 8on. Apply a signal to the input of the

amplifier. The level of the input signal should be as high as you will ever need in to

be. this way, It will be as high above the amplifier's noise floor as possible, ensuring

an excellent performance and signal to noise ratio. Adjust the LEVEL CONTROLS

for each channel to achieve the desired maximum listening level.

NOTE

When the clip LED's light, there is distortion, present in the amplifier's output section.

If a clip LED remains on or flashes repeatedly, reduce the signal level by lowering the

input level control for the channel that is clipping or reduce the level at the source.

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Parallel Mono Operation

Follow these instructions for parallel Mono

Operation using a single input cable, and

you will have the same monophonic signal

on both the channel 1 and the channel 2

output. Each channel's output is controlled

independently by that channel's level

control.

1. With the power off, set the OPERATION MODE SWITCH9to the PARALLEL

MONO position. When the power is on, the PARALLEL MONO LED3on the

front panel will light. If the LED does not illuminate, you have the switch in the

wrong position. Correct it before continuing.

2. With the power off, connect your input cables to channel 1 only using the eith-

er the female XLR INPUT JACK 1 or male XLR INPUT JACK 1 of chan-

nel 1. The other channel 1 input can be used to link to an additional amplifier.

3. Connect the loudspeakers to the channel 1 and channel 2 SPEAKER OUTPUT

6 . THE TOTAL SPEAKER LOAD MUST BE AT LEST 2 OHM PER CHANNEL.

If you try to operate a lower impedance, the amplifier will go into protection mode

and stop operation until you correct the load conditions.

4. With the LEVEL CONTROLS14set to zero (fully counterclockwise), switch

the power on. Apply a signal to the input. The level of the input signal should be

as high as you will ever need it to be. This way, it will be as high above the amp-

lifier's noise floor as possible, ensuring an excellent performance and signal

to noise ratio. Adjust the LEVEL CONTROLS for each channel to achieve the

desired maximum listening level.

NOTE

When the clip LEDs light, there is distortion present in the amplifier's output section.

If a clip LED remains on or flashes repeatedly, reduce the signal level by lowering the

input level control for the channel that is clipping or reduce the level at the source.

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Mono Bridge Operation

Follow these instructions to bridge the unit's output. Bridging. the amplifier converts

the unit to a monophonic or single channel. The amplifier can be used with 4 Ohm or

higher loads only in Mono Bridge mode. This mode is used to provide a higher voltage

with greater headroom to your speaker.

Before setting your amplifier for Mono

Bridge operation.

Make sure that your speaker can

handle the high power level provided

by the amplifier in Mono Bridge mode.

CAUTION

voltage over 100 volts may be produced at the bridge output terminals in this

mode.

1. With the power off, set the OPERATION MODE SWITCH 2 to the BRID-

GE position. When the power is on, the BRIDGE LED11on the front panel

will light. LED does not illuminate, you have the switch in the wrong position.

Correct it before continuing.

2. With the power off, connect your input cables to channel 1 input only using the

either the female XLR INPUT JACK1or male XLR INPUT JACK1of

channel 1. The other channel 1 input can be used to link to an additional amplifier.

3. Connect the loudspeaker to the BRIDGE SPEAKER OUTPUT15only. The

total speaker load must be at least 4 Ohms or above. If you try to operate at

a lower impedance, the amplifier will go into protection mode and stop operation

until you correct the load conditions.

4. With the CHANNEL 1 LEVEL CONTROL8set to zerofully counterclockw-

ise, switch the power on. Apply a signal to the input. The level of the input

signal should be as high as you will ever need it to be. This way, it will be as

high above the amplifier's noise floor as possible, ensuring an excellent per-

formance and signal to noise ratio. Adjust the LEVEL CONTROL 14 for

channel 1 to achieve the desired maximum listening level.

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NOTE

When the clip LEDs light, there is distortion present in the amplifier's output section.

if a clip LED remains on or flashes repeatedly, reduce the signal level by lowering the

input level control for channel 1 or reduce the level at the source. During Mono

Bridge operation, the channel 2 level is inactive, however, both channels LEDs

will flash simultaneously and show output conditions.

USING THE SIGNAL GROUND LIFT SWITCH

Depending on you system configuration, sometimes applying the ground will create

a quieter signal path. Sometimes lifting the ground can eliminate ground loops and

hum to create a quiter signal path.

1. With the power amp on, listen to the system in idle mode (no signal present) with

the ground appliedthe SIGNAL GROUND LIFT SWITCH5in the left positi-

on.

2. Then turn the power off before moving the SIGNAL GROUND LIFT SWITCH5

. Lift the ground by moving the SIGNAL GROUND LIFT SWITCH to the right, turn

the power back on and listen to determine which position will provide a signal

devoid of background noise and hum. Keep the SIGNAL GROUND LIFT SWITCH

in the ground position if the noise level remains the same in either position.

CAUTION

Do not terminate the ac ground on the power amplifier in any way. Termination of the

ac ground can be hazardous.

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TECHNICAL DATA

SPECIFICATIONS PS-3000 PS-4000 PS-5000

Both Channel Driven

8 Ohm

600 W

900 W

1200 W

Both Channel Driven

4 Ohm

980 W

1400 W

1900 W

Both Channel Driven

2 Ohm

1350 W

2000 W

2500 W

Mono Bridge 8 Ohm

1960 W

2800 W

3800 W

Mono Bridge 4 Ohm

2700 W

4000 W

5000 W

Circuitry

bipolar, class-H

Frequency Response

20 Hz - 20 kHz +/- 0.5 dB, 1 dB below maximum

performance

Total Harmonic

Distortion

less than 0.01% @ 1 kHz

Input Impedance

20 k Ohm balanced

Operation Mode

Parallel-Mono, Stereo and Bridge

Voltage Gain

switchable 26 dB , 32 dB or 1.4V

Limiter

switchable Peak - Limiter

Ground-Lift

ground - lift switch on back panel

Cooling

2 Speed Fan , Front - to - Rear Forced Air

Indicators

LED's for ON, SIGNAL, CLIP, at Both Channel . Parallel,

Stereo and Bridge, for Function Mode

Input Connectors

XLR Male / Female

Output Connectors

one 4-pole SPEAKON connector for each output channel

(channel 1 & channel 2),

one 4-pole SPEAKON connector exclusively for Mono

mode

Protection Circuits

Turn - on Delay, Short Circuit, DC, Current Limiter, Over

temperature Protection,

Signal to Noise Ratio

< -105 dB

Damping Factor

> 800 : 1

Dimensions (WxHxD)

483 x 133 x 464 mm（19", 3U）

Shipping

Dimensions(WxHxD)

615 x 215 x 580 mm

Net Weight

32.5 kg

35.5 kg

37 kg

Shipping Weight

36.5 kg

39.5 kg

41 kg

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UNiKA

WWW: http://www.unika.com.tw E-Mail: [email protected]

Tel : +886 2 2793-3017 Fax: +886 2 2792-8264

6F., No. 168, Xinhu 2nd Rd., Neihu Dist., Taipei City 114, Taiwan (R.O.C.)

Unika PS-4000 User manual

Brand: Unika

Model: PS-4000

Category: Musical Equipment

Type: User manual

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