PZ-1520.4 - Receiver Crunch - Free user manual and instructions

Product Type	4-Channel Car Audio Amplifier
Number of Channels	4
Fuse Rating	2 x 20A (Z-1520.4 model)
Power Wire Gauge	4 AWG recommended
Crossover Modes	Low-Pass, High-Pass, Full-Range (selectable per channel pair)
Low-Pass Filter Adjustment	Variable
High-Pass Filter Adjustment	Variable
Bass Boost	45 Hz, adjustable
Input Connections	RCA low-level and high-level speaker inputs
Output Connections	RCA pass-through for daisy-chaining
Speaker Connections	Spade terminals; supports stereo, bridged, and monoblock configurations
Input Mode Switch	Mono sum for subwoofer use
Remote Level Control	Optional (bass remote) – avoid adjusting while driving
Mounting Orientation	Do not mount upside down; ensure adequate ventilation
Chassis Ground	Scrape paint, use nut and bolt; do not use existing factory bolts
Power Connection	+12V from battery, REM from source unit, GND to chassis; fuse within 16 inches of battery
Anti-Theft Reset	Check if source unit requires a reset code after power disconnect
Compliance	Warranty: 1 year from date of purchase for original consumer

Frequently Asked Questions - PZ-1520.4 Crunch

How do I set the gain on my Crunch PZ-1520.4 amplifier?

Turn the LEVEL control fully counter-clockwise to minimum. Play a clean CD at 75% of source unit volume, then increase amplifier gain clockwise until distortion is heard, then back off slightly. This is not a volume control.

What wire gauge should I use for power and ground?

For the Z-1520.4 model, use 4 AWG high-quality copper cable. The power wire must be fused within 16 inches of the battery.

Can I use the high-level inputs if my head unit has no RCA outputs?

Yes, use the HI INPUT harness. Connect to the source unit's speaker outputs: Right + (grey), Right - (brown), Left + (white), Left - (green), and crossed ground (black).

How do I configure the crossover settings?

Use the XOVER Mode switch to select Low-Pass, High-Pass, or Full-Range for each pair of channels. Adjust the HPF and LPF controls to limit frequencies as needed. For subwoofers, use Low-Pass and set the input mode to MONO.

What is the purpose of the input MODE switch?

The MODE switch sums right and left signals in the MONO position to improve bass performance. Use MONO only when the amplifier is driving subwoofers.

How do I bridge the amplifier?

Follow the speaker connection diagram for bridged mode. Typically, connect the positive speaker wire to the positive terminal of one channel and the negative to the negative terminal of the paired channel. Refer to the manual for your specific configuration.

Can I mount the amplifier upside down?

No, do not mount the amplifier upside down. Choose a location with adequate air ventilation and mount it on a secure surface.

What should I do before disconnecting the battery?

Check if your source unit requires a reset code (anti-theft feature). Be prepared to disarm your vehicle's alarm and enter the code if needed.

How do I connect the chassis ground?

Choose a location close to the amplifier, scrape away paint completely, and use a nut and bolt. Do not use existing factory bolts. The ground connection is critical for performance.

What is the warranty period for my Crunch amplifier?

Maxxsonics USA Inc. warrants this amplifier to the original consumer purchaser for one year from the date of purchase against defects in materials and workmanship. Return to the original retailer for service.

USER MANUAL PZ-1520.4 Crunch

Many new and factory radios require a reset code when disconnected from battery power. This is an anti-theft feature. Before unplugging power, you must determine if your radio/source unit requires a reset code. Check the operation manual for your vehicle or contact the dealer.

Power / Ground cable size

It is critical to use the proper power and ground cable. Select the size listed here for your amplifier model. Always use high quality copper cable.

Cable size recommendations for multi amp systems are available on our website.

Model

Fuse Size

PZ-820.2	1-30A
PZ-1020.2	1-35A
PZ-1520.2	2-30A
PZ-2020.2	2-35A
PZ-3520.2-Pro	2-35A
PZ-1020.4	2-15A
PZ-1520.4	2-20A
PZ-2020.4	2-25A
PZ-4020.4-Pro	2-40A
PZ-3020.1D	1-60A
PZ-4020.1D	1-80A
PZ-5020.1D	2-60A

Installation

Disconnect negative battery terminal

Place terminal in a secure position so that it won't accidentally contact the negative battery post

Run Cables

Properly route power, speaker and RCA cables through the vehicle.

Mount Amplifier

Choose a mounting location that will provide adequate air ventilation. Mount the amplifier to a secure surface. Do not mount the amplifier upside down.

Chassis Ground

The chassis ground connection is critical to the performance of the amplifier. Choose a location that is close to the amplifier. Completely scrape away the paint and use a nut and bolt if possible. DO NOT USE AN EXISTING FACTORY BOLT!

Technical illustration of two mechanical components with bolts and a nut, no text or symbols present

Power

Connections

Using spade terminals, connect the +12V to the power cable from the battery, the REM to the source unit turn-on wire and the GND to the chassis ground..

Power

Connections

Larger amps

Strip each cable back approx 1/2", connect the +12V to the power cable from the battery, the REM to the source unit turn-on wire and the GND to the chassis ground..

Signal Input

Low Level RCA

Connect the RCA cables to the INPUT connectors. The OUTPUT can be used to provide input for a second amplifier.

Signal Input

High Level

The HI INPUT is for use with source units that do not offer RCA outputs. Use the supply harness to connect to the source unit's speaker output.

Connect to factory speaker wire directly

4CH REAR Ch3 Right + (orange) Ch3 Right - (pink) Chassis Ground (black) Chassis Ground (black) Left - (green) Left + (white) Left + (gray) Right - (brown) Right + (gray)

Level Control

Turn the LEVEL control completely counter-clockwise to minimum.

Speaker Connections

Using spade terminals, connect the speaker cables to the speaker output connectors. Follow the diagram below that best fits your speaker configuration.

Stereo

Bridged

onoblock single woofer Monoblock multiple woofers

Positive Battery Connection

Connect the power cable to the positive battery terminal. The power cable must be fused within 18 inches of the battery terminal.

Be prepared to disarm your vehicle's alarm and to enter your radio / source unit code.

Re-connect Negative Battery Terminal

Re-connect the negative battery terminal making sure it is securely tightened.

Setup Common System Setup

Input Mode

The input MODE switch will "sum" or combine the right and left channel signals in the MONO position to improve bass performance. Select MONO only when the amp is being used for subwoofers.

Xover Mode

The XOVER Mode switch sets the type of crossover that will be active. 4 channel models will have two switches, one for each set of channels.

High pass Adjustment

The HPF(high pass filter) control will limit the output below the selected frequency. This is typically used to protect midrange and hi frequency speakers from damage and to allow a smooth transition from a subwoofer.

Low pass Adjustment

The LPF(low pass filter) control will limit output above the selected frequency. This is used to allow a smooth transition to the higher frequency speakers.

Bass Boost

The BASS BOOST or BASS EQ control will increase the output at 45Hz for more pronounced bass. Exercise caution. Increase the level in small amounts until distortion is noticed, then back off a little.

Remote Level Control

Some models include a bass remote. Avoid adjusting the bass remote while operating vehicle.

Level Setting

This is a critical step to insure your amplifier is properly adjusted to match the signal output level of your source unit.

THIS IS NOT A VOLUME CONTROL!

1. If possible, with the source unit off, confirm that the primary volume control is turned down (counter clockwise).
2. Turn on the source unit (CD, or MP3 player). Re-confirm that the volume is turned down. Make sure the source unit controls; balance, fader, bass and treble are all set to center or "0" adjustment. Make sure that the green LED on the end of the amplifier is illuminated.
3. Play a clean musical selection of which you are very familiar. CD is preferred. Do not use radio signals for level setting. Hit play and start turning the volume of the source unit up.
4. Stop increasing the source unit volume when you reach 3/4 (about 75%) or until you hear speakers begin to slightly start producing distortion.
5. Increase the amplifier level (clockwise) until distortion is heard, then back the level down (counter clockwise) until the distortion is eliminated. Small adjustments may need to be made to balance the levels of multiple amplifiers.

2ch - Full Range

4ch - Full Range

4ch - Mixed Mono

Mono

The information contained within this document is intended to offer some basic guidelines for a few of the most common installations. More complex audio systems should be installed by a competent professional. Additional installation information available at www.maxxsonics.com

WARRANTY

Maxxonics 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. Maxxonics USA Inc. will, at it's 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 Maxxonics USA Inc. retailer from where it was purchased. A photocopy of the original receipt must accompany the product being returned. The sale price is subject to increase in the value of the property and/or equipment sold within the time of sale. The Company is not a company for any loss arising from the use of the U.S.A. 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

www.maxxsonics.com

CR PZ QSG 01 - rev1

CRUNCH®

Quick Start Installation Guide

Line drawing of a CRUNCH-branded electronic device (no text or symbols on the device itself)

PZ-820.2

PZ-1020.2

PZ-1520.2

PZ-2020.2

PZ-1020.4

PZ-1520.4

PZ-2020.4

PZ-4020.4-PRO

PZ-3020.1D

PZ-4020.1D

PZ-5020.1D

Congratulations on your choice of a Crunch amplifier. This "Quick Start Installation" guide is meant to help you "hook up" and play music. For more detailed information, on system setting, speaker and subwoofer configuration and full specifications by model visit the website, http://crunchcaraudio.com/manuals