BZX-3
3-Way Electronic Crossover Network
w/Remote Subwoofer Level Control
user’s manual
Thank you for purchasing the Blitz High performance Electronic Crossover. Rest assured you have
purchased a quality product designed and engineered to give you many years un-compromised
musical service. The Blitz Electronic Crossover has been designed using the latest in electronic
technology available today.
When you check the list of features offered by the BZX-3, you'll know you made the right choice
with a Blitz Electronic Crossover network.
INTRODUCTION...
general features
precautions
features and specifications
system wiring
mounting and installation
noise check and system adjustment
troubleshooting
2
3-4
5-7
8-9
10
11
12
table of contents
3-Way Electronic Crossover
Chrome Plated Chassis
Clear Acrylic Protective Cover
Hi-pass Crossover: 32Hz - 800Hz for Front and Rear Channels
X10 Frequency Multiplier for Front Channel
Low-pass Crossover: 50Hz -160Hz for Subwoofer Channel
18dB Per Octave Crossover Slopes
Variable Bass Frequency: 40Hz-120Hz
Boost Level :0-12dB
Parallel Input Switch, Mixed In/Out Switch
Remote Subwoofer Level Control
Power On LED Indicator
2
general features
3
Precautions
To prevent short circuits, be sure to disconnect the negative battery ground lead before wiring the system up.
When you finish the installation, be sure to make one more check to be sure everything is done correctly.
Reinstate all car parts that were removed.
Reconnect the negative battery ground lead.
4
Precautions
Primary Wiring Descriptions
ELECTRICAL PRIME CONNECTION DESCRIPTION
12V
GROUND
REMOTE
CROSSOVER
INPUT/OUTPUT
FRONT
INPUT
REAR INPUT
DUAL
IN/OUT
FRONT
OUTPUT
REAR
OUTPUT
SUB-WOOFER
OUTPUT
BATTERY +
GROUND -
REMOTE B +
PRIME CONNECTION
RADIO/TAPE
PLAYER TO
CROSSOVER MODULE
RADIO/TAPE
PLAYER TO
CROSSOVER MODULE
CROSSOVER MODULE
TO ANOTHER
CROSSOVER MODULE
CROSSOVER MODULE TO FRONT AMPLIFIER
CROSSOVER MODULE TO REAR AMPLIFIER
CROSSOVER MODULE TO SUB-WOOFER
AMPLIFIER
Connect to the positive battery terminal (constant + 12V
source)
Connect to the vehicle’s chassis ground (check for good
ground)
Connect to the remote control wire (or the electrical
antenna) of the car radio/cassette deck.
DESCRIPTION
Connect from pre-amp output of radio/tape player (or
CD) into
Connect from pre-amp output of radio/tape player (or
CD) into
Connect from CROSSOVER to the input or DUAL the
In/Out of another
Connect from “front output” of CROSSOVER module to
front amplifier input
Connect from“rear output” of CROSSOVER module to
rear amplifier input
Connect from sub-woofer output of CROSSOVER to sub-
woofer amplifier input
5
features and specifications
OUTPUT AMPLIFIER woofer amplifier input
6
features and specifications
Power source
Input current
Distortion
Frequency response
S/N ratio (A weighted)
Separation
Crossover frequencies
(continuously variable)
Front High-pass: (x1)
(X10)
Rear High-pass
Subwoofer
Crossover slope rate
Subwoofer boost
Input impedance
Output impedance
Output gain
Output voltage level
Dimensions
14.4 volts DC negative ground
0.5 amp max
0.01% THD at 1 V output level
10Hz-30KHz
±
3 dB
> 95dB
60 dB
160-800 Hz
1.6K-8K Hz
160-800 Hz
50-160 Hz
12 dB per octave 2
nd
Order Butter worth
Single octave 0dB to12dB (variable)
at 40 to 120 Hz (variable)
> 10K Ohms
<1K Ohms
+ 3dB
5 volts max
175mm (W) x 191mm (D) x 35mm (H)
1 Power Input Terminal (12V)
2 Ground Input Terminal
3 Remote Turn-on Input Terminal
(Remote)
4 Power Indicator
5 Left/Right Front Channel Signal Inputs
6 Dual Input Switch
7 Left/Right Rear Channel Signal Inputs
8 Left/Right Dual In/Out Terminals
9 Front Channel High-Pass Frequency
Selector
10 Rear Channel High/Pass Frequency
Selector
11 Front Channel High/Pass Frequency
Extender
To be connected to the positive terminal of your vehicle battery or other constant +12V source.
To be wired to the vehicle's chassis ground
To be connected to the remote control wire or antenna lead of the source unit for remote
ON/OFF.
This indicator lights up when the internal switching power supply is activated and the unit
is operational.
To be connected to the front channel output of the source unit.
"IN": when the parallel input is at the "IN" position, the input signals coming in through the
front channel signal inputs are split and directed to the front and rear channels simultaneously.
(This feature is to be engaged where the source unit has no separate front, rear or subwoofer
channel outputs.)
"OUT": If the source unit has independent front and rear channel outputs, disengage the parallel
input by sliding the switch to the "OUT" position.
To be connected to the rear channel outputs of the source unit. BUT MAKE SURE THAT THE
DUAL INPUT SWITCH AT THE "OUT" POSITION.
As Input Terminal: To be connected to the subwoofer output of the source unit.
As output Terminal: To be connected to the front channel input terminal of another electronic
crossover in a multi-crossover system.
For selection of front channel high-pass crossover frequency between 160 Hz and 800 Hz (or
1.6K Hz and 8K Hz when its frequency multiplier is at "x10" position).
For selection of rear channel high-pass crossover frequency between 160 Hz and 800 Hz
Positioning this switch at the "x10" position changes, the range of selectable crossover
frequency for the front channel high-pass from 160 Hz -800 Hz to 1.6K Hz - 8K Hz.
11 Front Channel High/Pass Frequency
Extender
Positioning this switch at the x10 position changes, the range of selectable crossover
frequency for the front channel high-pass from 160 Hz -800 Hz to 1.6K Hz - 8K Hz.
7
features and specifications
12 Subwoofer Frequency Selector
13 Bass-Boost Frequency Control
14 Bass-Boost Level Control
15 Phase Inverter
16 Subwoofer Stereo/Mono Switch
17 Front Channel Output Gain Control
18 Left/Right Front Channel Output
Terminals
19 Rear Channel Output Gain Control
20 Left/Right Rear Channel Output
Terminals
21 Subwoofer Output Gain Control
22 Left/Right Subwoofer Output
Terminals
23 Subwoofer Output Level Remote
Control Terminal
For selection of the low-pass crossover frequency for the subwoofer channel between 50 Hz
and 160 Hz.
For setting the frequency (from 40 Hz to 120 Hz) at which the BASS-BOOST circuitry generates
frequency boost to equalizer the woofer enclosure.
For selection of the boost level (from 0 to +12 dB).
Positioning the switch to the "180" position shifts the subwoofer output signals 180 degrees
out-of-phase relative to the front and rear output signals.
For selection of stereo or mono mode subwoofer output.
For adjusting the front channel output signal level.
To be connected to the front channel amplifier left/right inputs.
For adjusting the rear channel output signal level.
To be connected to the rear channel amplifier left/right inputs.
For adjusting the subwoofer channel output signal level.
To be connected to the subwoofer channel amplifier left/right inputs.
To be connected to the remote control for exclusive maneuver of the subwoofer output level,
and the subwoofer output level control on the unit ("21" above) is by-passed.
FEATURES AND SPECIFICATIONS SUBJECT TO CHANGE AND / OR IMPROVEMENT WITHOUT NOTICE.
8
System wiring
A) 2-CHANNEL Two-Way System
(Tweeter+ full range)
(B) 2-CHANNEL Two-Way System
(Tweeter+ woofer)
A
B
(C) 4-CHANNEL TRI-AMP System
C
9
System wiring
(D) 2-CHANNEL Multiple Purpose System
D
10
Mounting and installation
11
Noise check and system adjustment
NOISE CHECK
Check the entire audio system for noise before permanently securing the CROSSOVER mounting
1. Start the engine.
2. Turn the audio system on.
3. Rev the engine and vary the VOLUME of the audio system to determine if there is any unwanted noise.
If so, turn both the audio system and the engine off. Do not secure the CROSSOVER mounting screws. Refer to the "Trouble Shooting Guide" at this
manual.
4. If the audio system does not have any noise, securely tighten the CROSSOVER mounting screw and double check the wiring cables for safe placement.
SYSTEM ADJUSTMENT
Preliminary Adjustments
Pre-setting the system provides a necessary starting point for fine-tuning the entire audio system to maximum performance.
NOTE: DO NOT MOUNT CROSSOVER UNTIL THE FOLLOWING PROCEDURES HAVE BEEN COMPLETED.
1. Preset each amplifier input gain adjustment at the amplifier to half of maximum.
2. Before turning the audio system on, preset-adjust the front, rear and sub-woofer output level controls, as well as the front channel high-pass and sub-
woofer channel low-pass crossover points.
3. Slowly turn the volume up and listen carefully for: obvious trouble in sound (distortion, no sound, no hiss, total silence). Turn the system off refer to
“Trouble Shooting Guide” at this manual.
Caution
DO NOT ROUTE AUDIO CABLES AND POWER CABLES TOGETHER! THIS CAN CAUSE ENGINE NOISE IN YOUR AUDIO SYSTEM.
ALWAYS DISCONNECT THE SYSTEM FROM THE BATTERY BEFORE ATTEMPTING TO MAKE OR ALTER ANY CONNECTIONS. THIS
PRODUCT IS DESIRED FOR USE IN ANY 12 VOLTS NEGATIVE GROUND ELECTRICAL SYSTEM ONLY. INSTALLING THIS PRODUCT
IN ANY POSITIVE GROUND ELECTRICAL SYSTEM COULD SERIOUSLY DAMAGE THE AUDIO SYSTEM.
12
TBOUBLE SHOOTING GUIDE
1. There is an audible distortion at a low
volume level.
Output levels NOT set correctly.
PROBLEM
POSSIBLE CAUSE
Output levels NOT set correctly.
2. A whining sound can be heard through the
speakers when the audio system is at low
volume with the engine running. The whining
noise remains unchanged or seems to
disappear when the volume level is
increased.
3. There is a "motor boating" type of sound
when the engine is running and the audio
system volume is set at a reasonably high
level.
Check the red power wire. It muse be connected
directly to the battery. Check the system's
ground point It muse make good contact with
chassis ground (bare metal).
The radio and the CROSSOVER must be
grounded at the same reference point.
Check the red power wire. It must be connected
directly to the battery. Check the system's
ground point. It must make good contact with
chassis ground (bare metal).
All Blitz products are carefully constructed and thoroughly tested before
shipment. Products purchased in the USA are warranted to be free of defects
in material and workmanship for two (2) years from the date of purchase. This
warranty is limited to the original retail purchase.
Should the product fail due to factory defects in material or workmanship,
your unit will be repaired or replaced at the sole discretion of Blitz.
To obtain warranty service you must first call our Consumer Return Hotline
number at (718) 236-6948 to obtain a Return Authorization number. This
R.A.# must appear on the outside of your package and on all paperwork
relating to your return.
When returning a product to us for warranty service it must be carefully packed
and shipped prepaid to:
You must also include the following items:
• A copy of your sales receipt or other proof of purchase
• A brief letter indicating the problem you are experiencing
• include in your letter your return address, daytime phone number,
and R.A. number
• also include a check or money order for $15.00 for return shipping,
handling, and insurance, or provide your Visa/MC number with
expiration date.
R.A.#
Blitz Service Center
1600 63rd Street
Brooklyn, NY 11204
Our obligation under this warranty is limited to the repair or
replacement of the defective unit when it is returned to us prepaid.
This warranty will be considered void if the unit was tampered with,
improperly serviced, or subject to misuse, neglect, or accidental
damage.
limited warranty policy
www.blitzaudio.com
Crossover
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