Expert Service 1-661-257-9993 [Hours]

Crunch PZX900.4

900W 4-Channel PZX Powerzone Series Class AB Car Amplifier

Discontinued
|

We apologize

This item has been discontinued

Item Added to Cart

Crunch PZX900.4

900W 4-Channel PZX Powerzone Series Class AB Car Amplifier

$59.54

Keep Shopping

Get Added Peace of Mind with SquareTrade

Why SquareTrade?

  • The #1-Rated Protection Plan
  • 5-Day Service Guarantee & Free Shipping
  • Protection from Normal, Everyday Use
You have added a warranty
$7.99
Add Warranty
3 years of protection

Belva BAK44 4-Channel 4 Gauge Amplifier Installation Kit

Complete 4-Channel CCA 4 Gauge Amp Kit with RCA Cables and Speaker Wire

$29.99

Add
NVX Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

$7.99

Add
Kicker 4-Channel RCA Audio Interconnect Cable

4 Meters (13 ft.) 4-Channel K-Series RCA Audio Interconnect Cable

$19.99

Add

Don't see the accessory you're looking for?
View all available accessories for the Crunch PZX900.4.

Get FAST answers from customers ASK a Question See questions answers

Crunch Audio Store

General Features:

  • 4-Channel Powerzone Series Class AB Car Amplifier
  • Max Power Rating:
    • 4 ohms: 115 watts x 4 chan.
    • 2 ohms: 225 watts x 4 chan.
    • Bridged, 4 ohms: 450 watts x 2 chan.
  • Max power output: 900 watts
  • SEPP (Single Ended Push Pull) A/B Class Amplifier Designs
  • Rugged Pulse Width Modulated MOSFET power supply
  • Silver-plated RCA level inputs
  • Silver-plated screw terminals
  • 4, 3 or 2 channel operation
  • Speaker-level (high-level) inputs
  • LED power (green) and protect (red) indicators
  • Preamp RCA outputs to daisy chain multiple amps
  • Heavy duty aluminum alloy heat-sink for extreme heat dissipation
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Input sensitivity: 200mV - 5V
  • Frequency Response: 10 - 45,000 Hz
  • Total Harmonic Distortion (THD): <0.05%
  • Signal to Noise Ration: >90 dB
  • Selectable crossover modes: FULL / LPF / HPF
  • Variable low-pass filter: 30 - 250 Hz
  • Variable high-pass filter: 60 - 1,200 Hz
  • Variable Bass Boost: 0 to +9 dB bass boost at 45 Hz
  • Fuse Rating: 30A x1
  • 4 - 8 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Dimensions: 10.24"L x 9.29"W x 2.17"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

55 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

110 watts x 4 channels
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

225 watts x 2 channels

Power Specifications - Full Range Channels

Peak Power @ 4 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

115 watts x 1 channels
Peak Power @ 2 ohms
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. However, some manufacture's do not provide an RMS figure and therefore one cannot be advertised.

225 watts x 1 channels
Bridged Peak/Max Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the Peak/Max power created once an amplifier is bridged.

450 watts x 2 channels

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
PowerZone (Crunch)
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

AB
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

900 watts
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

450 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
Any Gauge with use of Spade Terminal AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Yes
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
1 pair
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

60 - 1200 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

30 - 250 Hz
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 9 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
30A x 1 
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.
No
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

No
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Not Tested
Hi-Res Audio Compatible
This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
78%
4 Star
11%
3 Star
11%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.8
Features
4.7
Design
4.6
Usability
4.6
paul

jeffersonville ky

Overall
Durability
Value
Features
Design
Usability
great product for your money.

August 15, 2015

great sound very easy to hook up and its a awsome amp would recmend to my freinds and family.

7 of 9 found this helpful

Was this review helpful to you?

taylor

the d, MI

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
awesome amp, exactly what i anticipated

September 18, 2015

when it says its 900 watts and it says its bridged 2 channels @ 450 each rms u know basically all of the ratings rms are like double overated. i feel like im getting maybe around 60rms x4 @4ohm, dont got a meter but if they put anything near what they claim my speakers would all be abused or blown.

if u need some extra power for your 4 main car speakers, this should be more than enough, was for me and i love loud music.. its probably enough to make u deaf quick lol, yet very clean clear power. its okay we can always turn the gain down to not murder our eardrums.

additionally i dont see why anyone would ever need a 4 channel amp louder or more watts than what this one truly puts out because this is loud as hell lol. i bet if i drove by another car full volume they would feel their volume is maxed in their own car lol. just with probably 1 window down lol.

maxxsonics makes good quality amps, as long as u know what those true specs actually are. this is my first crunch amp, but i've been a hifonics brutus amp fan. I would recommend this amp to anyone.

1 of 1 found this helpful

Was this review helpful to you?

Jh

Illinois

Overall
Durability
Value
Features
Design
Usability
Great Deal

March 3, 2016

For the money I don't think I could have bought anything better than this. I also bought another crunch mono block to push my subs. I'm completely satisfied. You wouldn't believe how well the system sounds for no more money than I have invested in it. Thanks Sonic.

0 of 0 found this helpful

Was this review helpful to you?

Josè

Malakoff, TX

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Crunch PZX900.4

February 8, 2016

Great amp I like the color and like the sound quality of this amp I would recommend it to a friend.

0 of 0 found this helpful

Was this review helpful to you?

Kelly

Upper marlboro

Overall
Durability
Value
Features
Design
Usability
Great Sound Great Price

January 29, 2016

I was very pleased with my purchase. My car stero system is now complete.

0 of 0 found this helpful

Was this review helpful to you?

Lvjamman

North las vegas, nevada

Overall
Durability
Value
Features
Design
Usability
Lvjamman

December 17, 2015

I just installed the unit in my truck and i live it! It works great with my kenwood excelons!

0 of 0 found this helpful

Was this review helpful to you?

Craig

LA, CA

Overall
Durability
Value
Features
Design
Usability
Can't beat the price!

November 3, 2015

This amp is actually pretty good. I use it to run 1 sub and 2 five and a half 2-way speakers. I plan to use it for just my highs later. The price and quality at this time fits my budget.

0 of 0 found this helpful

Was this review helpful to you?

bigk

va

Overall
Durability
Value
Features
Design
Usability
crunch pzx900.4

October 2, 2015

I really love my new amp you will not be disappointed if you decide to buy this product PZX900.4 go out and try one the next time your looking to upgrade good luck

0 of 0 found this helpful

Was this review helpful to you?

radar

jeffersonville kentucky

Overall
Durability
Value
Features
Design
Usability
great amp they sound really good and real simple to hook up.

October 2, 2015

the crunch is a great price and its no to big and it fits good right along your side your subs without toying with it .i recommend anyone to buy this product.

0 of 0 found this helpful

Was this review helpful to you?

Accessory Tools and Products

Accessories added

Belva BAK44 4-Channel 4 Gauge Amplifier Installation Kit

Complete 4-Channel CCA 4 Gauge Amp Kit with RCA Cables and Speaker Wire

Your Price $29.99

Belva BAK84

Complete 8 Gauge Amplifier Wiring Kit with 4-Channel RCA Interconnects

Your Price $24.99

NVX Universal Remote Level Bass Control

Controls bass level and frequency via RCA/Interconnect connectors on any amp.

Your Price $7.99

Universal Remote Bass Level Control Knob

Flush Mount & Universal via RCA. Works with any amp, controls your bass output

Your Price $9.99

Kicker 4-Channel RCA Audio Interconnect Cable

4 Meters (13 ft.) 4-Channel K-Series RCA Audio Interconnect Cable

Your Price $19.99

NVX XIV45 4-Channel RCA Audio Interconnect Cable

5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $23.99

NVX V-Series RCA Interconnect Cable

19 ft. of 4-Channel RCA cable with dual twisted-pair conductors

Your Price $11.99

NVX XIX45 X-Series RCA Interconnect Cable

16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $34.99

StreetWires ZN9 Series Interconnect Cable

16.4 ft. of 4-Channel RCA Cable with Rhodium-plated contacts and ZeroNoise construction for clear signal transfer!

Your Price $74.77

NVX XWS1225 12 AWG Speaker Wire

25 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $39.99

NVX XWS1250 Speaker Wire

50 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $29.99

NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $15.99

Belva BBSW127 12 AWG Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $14.99

Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $69.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $34.99

XS Power BIG3XS 100% OFC 1/0 Gauge Big 3 Upgrade Kit

1/0 AWG Big 3 Upgrade Kit with 100% OFC Wire for Audio Sytems up to 350 Amps

Your Price $92.52

270 Amp G Series Alternator for Select 1994-2012 GM Vehicles

Most Popular! 270+ amps at anything above 1800 rpm engine speed!

Your Price $448.89

240 Amp S Series Alternator for Select 1992-2003 Dodge/Jeep Vehicles

240 Amp cutting edge 6 phase hairpin epoxy reinforced stator technology

Your Price $399.00

240 Amp L Series Alternator for Select 1963-1985 GM Vehicles

Specifically designed to fit in tight spaces

Your Price $399.00

250 Amp Alternator for Select 2003-2008 Ford/Lincoln/Mercury Vehicles

Cutting edge 6 phase hairpin stator technology with Twin internal rectifier plates with finned heat sink

Your Price $399.99

240 Amp S Series Alternator for Select 1999-2006 Jeep Vehicles

6 phase alternators use less horsepower per Kilowatt than conventional 3 phase alternators

Your Price $399.00

240 Amp S Series Alternator for 2011 Toyota Corolla

Ultra precision balanced rotor with oversized charge post ensure sturdy cable connections

Your Price $399.99

240 Amp S Series Alternator for 2006-2011 Honda Civic

15% more efficient than typical alternators

Your Price $549.99

370 Amp E Series Alternator with Black Finish for Select 1994 - 2003 GM

WOW 370 AMPS! Elite series offers the highest possible amperage

Your Price $699.00

320 Amp S Series Alternator for Custom and Racing Applications

Great for a Custom Project

Your Price $499.00

XS Power XP750 Special Edition

12-Volt Deep Cycle AGM Power Cell with 750 Max Amps

Your Price $72.99

Kinetik HC600-BLU

BLU Series 600 Watt 12V High Current AGM Car Audio Power Cell

Your Price $49.99

XS Power D545

12-Volt Deep Cycle AGM Power Cell with 800 Max Amps

Your Price $109.99

NVX XCAP1F

True 1.0 Farad 20V Capacitor with Digital Read-out, Built-in Distribution Block

Your Price $59.99

Rockford Fosgate RFC1D - Top of the Line 1 Farad

Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max

Your Price $99.99

Belva BB1D

1.0 Farad Capacitor with Digital Red Display for up to 1000W Max

Your Price $21.99

NVX XTGSP2

Perfect for safely troubleshooting and testing audio systems

Your Price $29.99

Scosche TK12

The perfect kit for installing a car stereo and amplifier for the first time

Your Price $18.99

Universal Wire Puller

Make your installation less of a chore and save yourself the stretch

Your Price $7.99

Pair of 4 Gauge Spade Terminals, #8 Opening

Spade Terminals • 4 Gauge • 1 Red & 1 Black • Nickel Plated

Your Price $2.99

Pair of 8 Gauge Spade Terminals, #8 Opening

Spade Terminals • 8 Gauge • 1 Red & 1 Black • Nickel Plated

Your Price $2.49

Pair of 10 Gauge Spade Terminals, #8 Opening

Spade Terminals • 10 Gauge • 1 Red & 1 Black • Nickel Plated

Your Price $1.99

8 Gauge Ring Terminals, 5/16" Opening

Nickel Plated Brass - 5 Pieces (3 Red & 2 Black)

Your Price $1.99

0/1 Gauge Ring Terminals, 3/8" Opening

Nickel Plated Brass - 5 Pieces (3 Red & 2 Black)

Your Price $4.99

PRO Series Classic Short GM Battery Post Shoc-Krome

Side post battery adapter for GM type batteries (Positive or Negative)

Your Price $4.99

PRO Series Classic Long GM Battery Post w/ Shoc-Krome Plating

Side post battery adapter for GM type batteries (Positive or Negative)

Your Price $6.99

200 Amp Relay Isolator (BIR200)

Great for isolating a second batter making it dedicated to the stereo system

Your Price $39.99

120 Amp 4-Post Battery Isolator

Prevents primary battery discharge and extends battery life

Your Price $69.97

240 AMP 3-Post Battery Isolator

Prevents primary battery discharge and extends battery life

Your Price $124.60

World's Smallest AFS / Mini ANL Fuse Holder

Accepts 4 gauge or 8-gauge wire

Your Price $12.99

ANL/Mini-ANL Fuse Holder with 1/0 or 4 Gauge Input and Output

No-fail termination and current flow, it helps keep your system protected and running smoothly

Your Price $19.99

4 Pack of 80 Amp Nickel-Plated MANL Fuse

Mini-ANL (MANL/AFS) 80A Nickel Plated Fuses

Your Price $3.99

4 Pack of 100 Amp Nickel-Plated MANL Fuse

Mini-ANL (MANL/AFS) 100A Nickel Plated Fuses

Your Price $3.99

4 Pack of 150 Amp Nickel-Plated MANL Fuse

Mini-ANL (MANL/AFS) 150A Nickel Plated Fuses

Your Price $3.99

2 Pack of 200 Amp Nickel-Plated ANL Fuse

Two fuses per order. High quality 200 Amp ANL Fuses

Your Price $2.99

2 Pack of 300 Amp Nickel-Plated ANL Fuse

Two fuses per order. High quality 300 Amp ANL Fuses

Your Price $2.99

Gauge Reducer, 4 Gauge Input to 8 Gauge Pin

Great for amplifiers that do not accept a large gauge power wire

Your Price $5.99

Gauge Reducer, 1/0 Gauge Input to 4 Gauge Pin

Great for amplifiers that do not accept large gauge power wire

Your Price $6.95

NVX VUBT2

Universal Bluetooth Audio Receiver

Your Price $26.99

NVX XUBT3

Universal Bluetooth Audio Receiver & Volume/Playback Controller Knob

Your Price $74.99

Browse 5 questions and 12 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Crunch 4ch amps are cost effective and have a great daily street able sound
paul m on May 9, 2016
good price. Over powered for what I'm going to use it for is a plus!
And I could use it at 2ohm to power 4 subs at lower watts.
colt O on Sep 8, 2015
The price and the fact that I currently have a CRUNCH amp and never had a problem with it.
Craig R on Sep 10, 2015
good high powered amp on sale for an affordable price
Brad S on May 13, 2015
Is the rca output affected by the crossovers for the front/rear channels? My sub amplifier is getting a low signal from this output
surewhynot on Dec 15, 2015
Best Answer: When I purchased and installed this amp last spring in my boat I was getting a little feedback through the speakers. Is this what you're getting but hear it more through the sub? My prob that I found out from I believe reading the book on this amp was to ground out the speakers......the - speaker wires are supposed to be grounded. So unlike most other amps that you would normally just hook the speaker wires from the amp to the speakers and that's it, you have to run wires from the - terminal on the amp to the body of the car or something metal in your car that will ground. After I did that my sound prob went away and it sounded great! 2ndly I would never run one amp through another amp. Make sure you have a head unit that has enough rca outs to accommodate all your amps. I'm assuming you have a head unit that only has 4 rca outs as that's what it takes to run 4 channels on this Crunch amp and you're using that output to run the sub amp? Try what I suggested if that's not how you have it set up and if it still does it I would get another head unit with 6 rca outs. These are only my suggestions.....As for the initial question?? No, I believe the output on the amp is a through output from your low output coming from your head unit. I believe this is a grounding issue.
Reply · Report · Brad S on Dec 15, 2015
· Add Answer · I Have This Question Too (0)
Dimensions?
OLe GD on Apr 13, 2015
Reply · Report · Rick MStaff on Apr 14, 2015
· Add Answer · I Have This Question Too (0)
will this amp run 2 ohm on all 4 channels?
william h on Dec 11, 2014
Best Answer: Hello William,

Yes, the amp gives you a 2ohm rating, which implies it can be ran at that impedance. Keep in mind, if One Channel runs at 2ohms, the Entire amp must.
Reply · Report · Sonic Electronix SStaff on Dec 14, 2014
· Add Answer · I Have This Question Too (0)
will this drive 2 speakers(l&r) and a small sub? I have 4 door speakers(1 4 chan amp) and 2 rear deck and small sub
mike8668 on Oct 17, 2014
Best Answer: Hello Mike,

Yes, this is possible. However, it is Very important that a 4Ohm impedance is kept the same at all outputs. This means you are OBLIGATED to 4ohm 'Deck' Speakers, and a 4ohm final load at the subwoofer. This is because Bridging channel 3&4 will ONLY be stable at 4ohms, to the subwoofer. Despite the ambitious figures given by the manufacture, we suggest a subwoofer asking no more than ~200w RMS @ 4ohms.
Reply · Report · Customer SStaff on Oct 18, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

PZX900.4

UPC

100010962678

Weight

9.00lbs

Internal SKU

pzx9004

Internal Product ID

76944

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Crunch PZX900.4