CRXR - Unknown Crunch - Free user manual and instructions

Product Type	2/3-Way Electronic Crossover
Brand	Crunch
Model	CRXR
Power Supply	DC/DC Regulated Switching Power Supply
Input Type	Front and Rear RCA Inputs, Mixed In/Out Terminals
Output Type	Front, Rear, Subwoofer (Stereo/Mono)
High-Pass Frequency Range	32Hz - 400Hz (x1), 640Hz - 8KHz (x20)
Low-Pass Frequency Range	32Hz - 400Hz
Bass Boost	Quasi-Parametric, 12dB boost at 45Hz
Phase Inverter	180° switch
Remote Level Control	Under-dash module included
Subwoofer Mode	Stereo or Mono selectable
Rear Input Switch	Front/Rear to split or combine input signals
Frequency Multiplier	x1/x20 for front high-pass
Output Level Control	Adjustable for front, rear, and subwoofer channels
Power Indicator	Green LED
Warranty	1 year (parts and labor)

Frequently Asked Questions - CRXR Crunch

How do I set up the CRXR with a 2-channel source unit?

For a 2-channel source unit, set the REAR INPUT switch to the FRONT position. Connect the front RCA outputs of the source unit to the front inputs of the CRXR. The signal will be split to both front and rear outputs.

What does the Bass Boost switch do?

The Bass Boost switch activates a quasi-parametric equalization circuit that provides a single octave 12dB boost at 45Hz to compensate for the natural roll-off of sealed enclosures, ensuring smooth and accurate bass response.

How do I connect the remote level control module?

The Remote Level Control module is designed for under-dash mounting. Connect it to the CRXR via the provided cable. It allows you to adjust the subwoofer low-pass level remotely from the driver's seat.

What is the purpose of the Phase Inverter switch?

The Phase Inverter switch shifts the subwoofer output signal 180 degrees out of phase relative to the front and rear outputs. This helps correct phase cancellation issues when integrating subwoofers with main speakers.

How do I troubleshoot low output power?

First, ensure level controls are properly adjusted. Then measure battery voltage at the amplifier and crossover terminals; it should be 11 volts or more. Also check all +12V and ground connections for tightness and corrosion.

Can I use the CRXR with a 4-channel source unit?

Yes. For a 4-channel source unit, set the REAR INPUT switch to the REAR position. Connect the front RCA outputs to the front inputs and the rear RCA outputs to the rear inputs of the CRXR.

What does the Frequency Multiplier switch do?

The Frequency Multiplier switch on the front high-pass section multiplies the crossover frequency range. In the x1 position, the range is 32Hz-400Hz; in the x20 position, the range becomes 640Hz-8KHz for finer tuning.

How do I connect the subwoofer output?

Use the Left/Right Subwoofer Output Terminals (item 21) to connect to your subwoofer amplifier. You can select Stereo or Mono mode using the subwoofer stereo/mono switch (item 15).

Why is my CRXR blowing fuses?

Check that the input voltage does not exceed 15 volts. Inspect for a short on the main +12V cable to chassis. If the unit still blows fuses with only power, ground, and remote connected, the unit may be faulty and require warranty service.

How do I eliminate engine whine or alternator noise?

Ensure the head unit ground is connected directly to the vehicle chassis, not through factory wiring. Also run a separate wire from the radio ground to the crossover's ground input. Keep RCA cables away from high-current wires like fuel pumps or distributors.

USER MANUAL CRXR Crunch

Thank you for purchasing the CRUNCH CRXR 2 / 3-Way crossover. This model operates as either a 2 or 3-way crossover with an 18dB / Octave subwoofer crossover with remote gain control module. This unit will provide filtered signals to front and rear amplifiers, and Low Pass subwoofer output using a single pair of inputs. Please read the entire manual to ensure proper connections and application.

CAUTION

Always consider consulting a professional audio installer before installing any audio components. Be careful and take your time. Do not let wires make contact with metal edges or hot engine components.

Product Features

Bass Boost with Quasi-Parametric Equalization

A sealed enclosure causes the woofers frequency response to roll off at a rate is 12dB per Octave below the enclosures resonant frequency. Our Bass Boost Quasi-Parametric Equalization circuitry provides a single Octave boost at 12dB at 45Hz to ensure smooth and accurate bass response.

DC / DC Regulated Switching Power Supply

This power supply design provides constant voltage regardless of the battery's voltage to ensure constant output performance at all times.

Frequency Multiplier

The front High Pass section is equipped with a frequency multiplier switch that can be used to multiply the crossover frequency points. With the additional selectable crossover points, system settings become precise.

Rear Input Switch

Using this switch, a rear signal output can be delivered from a single input source without having to use an adaptor to split the input cables.

Front / Rear Inputs with Front / Rear / Sub Outputs

This unit has front and rear pre-amp inputs with front and rear outputs as well as a constant subwoofer output that is independent of the fader position on the source unit.

Adjustable Output Level Control

Stereo / Mono Subwoofer Control Switch

Remote Level Control via Under-Dash Module

Functions & Operations

1 Power Input Terminal: Connect to battery + positive terminal with 5 amp in-line fuse.
2 Remote Turn-On Terminal: Connect to the source unit (radio / CD player) remote turn-on or accessory wire. This wire should get +12 volts when the source unit is turned on and 0 volts when turned off.
3 Ground Input Terminal: Connect to chassis ground.
4 Power Indicator: The power light will illuminate green when the unit is turned on.
5 Left / Right Front Channel Signal Inputs: Connect to the Front (L & R) channel output of the source unit.

Functions & Operations Cont.

6 Front / Rear Input Switch: In the FRONT position, the input signals coming in through the front channel signals are split and directed to the front and rear channels simultaneously. This feature is engaged when the source unit has no front / rear or subwoofer channel output. In the REAR position, if the source unit has front & rear RCA outputs, disengage the rear inputs by placing the switch in REAR position.
7 Left / Right Rear Channel Signal Inputs: Connect to the rear (L & R) channel output of the source unit. Make sure that the REAR INPUT switch is in the REAR Position.
8 Left / Right Mixed In / Out Terminals: As an INPUT terminal, connect the subwoofer output of the source unit. As an OUTPUT terminal, connect to the front channel input terminal of another electronic crossover in a multi-crossover system.
9 Front Channel High-Pass Frequency Selector: In the x1 position, the high-pass crossover frequency range is adjustable from 32Hz to 400Hz and in the x20 position, the frequency range is adjustable from 640Hz to 8KHz. This allows for fine tuning.
10 Rear Channel High-Pass Frequency Selector: Allows selection of REAR Channel High-Pass frequency from 32Hz to 400Hz.
11 Front Channel High-Pass Frequency Multiplier: In the x1(times one) position, the Front High-Pass frequency is adjustable from 32Hz to 400Hz and the x20(times twenty) the frequency is adjustable from 640Hz to 8KHz.
12 Subwoofer Frequency Selector: Adjustment of the Low-Pass crossover frequency for the subwoofer channel from 32Hz to 400Hz.
13 Bass Boost Switch: When activated, this circuit provides a single Octave boost of 12dB at 45Hz to equalize the sub enclosure.
14 Phase Inverter: In the "180" Position, the unit shifts the sub output signal 180 degrees out of phase relative to the front and rear output signals.
15 Subwoofer Stereo / Mono Switch: Selects stereo or mono for the subwoofer output.
16 Front Channel Output Level Control: Allows for adjustment of the front channel output signal.
17 Left / Right Front Channel Output Terminals: Connect to the amplifier front channel left / right inputs.

Functions & Operations Cont.

18 Rear Channel Output Level Control: Allows for adjustment of the rear channel output signal level.
19 Left / Right Rear Channel Output Terminals: Connect to the amplifier rear channel left / right inputs.
20 Subwoofer Output Level Control: Allows for adjustment of the subwoofer channel output signal level.
21 Left / Right Subwoofer Output Terminals: Connect to the amplifier subwoofer or non-fading output.
22 Remote Level Control: This is the under-dash mounted bass remote module which adjusts the Low-Pass level.

2 Channel Source Unit Setup

graph TD
    A["SOURCE UNIT"] -->|FRONT RCA OUTPUT| B["BRANCH CRXR"]
    A -->|CHASSIS GND| C["BRANCH CRXR"]
    B --> D["REAR INPUT"]
    B --> E["REAR OUTPUT"]
    B --> F["MONO INPUT"]
    B --> G["MONO OUTPUT"]
    B --> H["REMOTE LEVEL"]
    C --> I["FRONT 2 CHANNEL AMPLIFIER"]
    C --> J["REAR 2 CHANNEL AMPLIFIER"]
    C --> K["MONO AMPLIFIER"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333
    style G fill:#fcc,stroke:#333
    style H fill:#fcc,stroke:#333

For 2 Channel source unit operation, be sure the "REAR INPUT" switch is in the FRONT position. This will direct the audio input signal to both front and rear outputs.

4 Channel Source Unit Setup

graph TD
    A["SOURCE UNIT"] -->|REAR RCA OUTPUT| B["FRONT RCA OUTPUT"]
    A -->|CHASSIS GND| C["BAT +12V 5 AMP FUSE"]
    B --> D["CRUNCH CRXA"]
    C --> E["FRONT 2 CHANNEL AMPLIFIER"]
    C --> F["REAR 2 CHANNEL AMPLIFIER"]
    C --> G["MONO AMPLIFIER"]
    D --> H["REMOTE LEVEL"]
    E --> I["REMOTE LEVEL"]
    F --> J["REMOTE LEVEL"]
    G --> K["REMOTE LEVEL"]

TO SPEAKERSTO SPEAKERSTO SUBWOOFER(

FRONT/REAR

NOTE:

For 4 Channel source unit operation, be sure the "REAR INPUT" switch is in the REAR position.

5 Channel Source Unit Setup

graph TD
    A["CRUNCH CRXR"] -->|SUBWOOFER / NON FADE RCA OUTPUT| B["SOURCE UNIT"]
    A -->|REAR RCA OUTPUT| C["CHASSIS GND"]
    A -->|FRONT RCA OUTPUT| C
    A -->|BAT +12V 5 AMP FUSE| C
    A -->|REMOTE LEVEL| D["MONO AMPLIFIER"]
    C --> E["FRONT 2 CHANNEL AMPLIFIER"]
    C --> F["REAR 2 CHANNEL AMPLIFIER"]
    C --> G["CONCLOSURE OF CHASSIS GND"]

TO SPEAKERSTO SPEAKERSTO SUBWOOFER(S)

FRONT/REAR

NOTE:

For 5 Channel source unit operation, be sure the "REAR INPUT" switch is in the REAR

Diagnostics & Trouble Shooting

The key to finding the problem in a troubled sound system is to isolate parts of that system in a logical fashion to track down the fault and correct the issue.

The diagnostic system will not shut down the crossover or the amplifier(s), although the amplifier(s) own protection circuitry may shut the amplifier(s) down should a fault status occur. At which time you will need to consult the owners manual for that particular amplifier.

Low Output Power

1) Check that level controls have been set up properly

2) Make sure that the battery voltage, as measured at the amplifier(s) and crossover +12 volt and ground terminals, is 11 volts or more.

3) Check all +12 volt and ground connections.

Fuses Blowing

1) Insure that the voltage to the unit does not exceed 15 volts.

2) A short on the main +12 volt cable from the battery to the vehicle chassis will cause the main fuse to blow.

3) If the CRXR is blowing fuses continually with only +12 volt, ground and remote leads connected, the unit may be faulty.

Fuses Blowing

1) Check all fuses.

2) Check all connections.

3) Measure the +12 volt and remote turn on voltages at the amplifier(s) and crossover terminals. If these are non existent or low, take voltage measurements at fuse holders, distribution blocks, the head unit's +12 volt and remote leads to localize the problem.

Hiss, or White Noise

1) High levels of white noise usually occur when level controls are turned up too high – reduce the levels until the noise is no longer present.

2) Another problem that can cause excessive hiss, is a noisy head unit – unplug the crossover input RCA's, and if the hiss level reduces, the source unit is at fault.

Electrical Interference

The inside of an automobile is a very hostile electrical environment. The multitude of electrical systems, such as the ignition system, alternator, fuel pumps, air conditioners, to mention just a few, create radiated electrical fields, as well as noise on the +12 volt supply and ground. To try and eliminate this noise, run a wire from the radio ground wire to the ground input on the crossover.

Ticking or Whine that changes with engine RPM

1) This problem could be caused by radiation pickup of RCA cables that are too close to a fuel pump or a distributor.

2) Check that the head unit ground is connected straight to the vehicle chassis, and does not use factory wiring for ground.

3) Try to supply the head unit with a clean +12 volt supply directly from the battery +, instead of using a supply from the in dash wiring/fusebox.

Constant Whine

This type of noise can be more difficult to pinpoint, but is usually caused by some kind of instability, causing oscillations in the system.

1) Check all connection, especially for good grounds.

2) Make sure that no speaker leads are shorting to exposed metal on the vehicle chassis.

3) RCA cable are notorious for their problematic nature, so check that these are good, in particular the shield connections.

CRUNCHCARAUDIO.COM

WARRANTY

Maxxsonics USA Inc. warrants this product, to the original consumer purchaser, to be free from defects in material and workmanship for a period of one (1) year from the date of purchase. Maxxsonics USA Inc. will, at its discretion, repair or replace defective products during the warranty period. Components that prove to be defective in materials and workmanship under proper installation and use must be returned to the original authorized Maxxsonics USA Inc. retailer from where it was purchased. A photocopy of the original receipt must accompany the product being returned. The costs associated with removal, re-installation and freight are not the responsibility of Maxxsonics USA Inc. This warranty is limited to defective parts and specifically excludes any incidental or consequential damages connected therewith. To view the full warranty, please visit the website.

Crunch products are designed and engineered in the USA by

MAXXSONICS®