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Crunch PZX1800.4

1800W 4-Channel Powerzone Series Class AB Car Amplifier

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Crunch PZX1800.4

1800W 4-Channel Powerzone Series Class AB Car Amplifier

$79.99

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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

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NVX Universal Remote Level Bass Control

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

$7.99

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Kicker 4-Channel RCA Audio Interconnect Cable

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

$19.99

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General Features:

  • 2-Channel Powerzone Series Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 225 watts x 4 chan.
    • 2 ohms: 450 watts x 4 chan.
    • 4 ohms Bridged: 900 watts x 2 chan.
  • Max power output: 1800 watts
  • Rugged MOSFET Pulse Width Modulation power supply
  • Amp protection with system diagnostics LEDs
  • Variable Bass Boost (0 to +9 dB bass boost at 50 Hz)
  • 4/2 or Mono channel operation
  • Speaker-level (high-level) inputs
  • Daisy chain line outputs
  • Oversized speaker terminals
  • Variable high-pass filter (60-1,200 Hz, 24 dB/octave)
  • Variable low-pass filter (30-250 Hz, 24 dB/octave)
  • 4 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
  • 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.

225 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.

450 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.

900 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.

225 watts x 4 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.

450 watts x 4 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.

900 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.

1800 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)
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

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
33%
4 Star
67%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
3.7
Value
4.7
Features
4.7
Design
4.0
Usability
4.7
Pjm

Ohio

Overall
Durability
Value
Features
Design
Usability
Beautiful mid and high amp

October 18, 2016

Had the crunch 1000, sounded pretty good went to the pzx1800.4 and everything came to life .well worth the money.

0 of 0 found this helpful

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Ryan

Philadelphia, PA

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Great for the price

July 18, 2016

I've been using this for 4 full range speakers. Has them sounding very clear and loud.

0 of 0 found this helpful

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Jimmy

Seychelles

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
good design

May 24, 2016

i brought one of these, look good and strong, but im yet to install in my car.

0 of 0 found this helpful

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Browse 4 questions and 7 answers
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Why did you choose this?
Sonic Electronix Store
its 4 watts i heard crunch was good and i need 1800 watts to pull my jackhammers and interior speakers
Nikole H on Sep 1, 2016
can the crunch 1800.4 be used with two bridged channels to feed each coil on a dual voice coil sub to get the full output fed into the sub? how do you wire it for the highest power out? or does that cause interference/distortion.......?
natrain on May 18, 2016
Best Answer: i have two Kicker CVR 12" dual voice coil speakers running at a 1ohm load on this amp for each side. if you zoom into the pics on the website, channel 1&2 and channel 3&4 have a diagram above the speaker connections showin you where to connect the wires to bridge each side.
Crunch PZX1800.4
Crunch PZX1800.4
Reply · Report · Charles H on May 19, 2016
· Add Answer · I Have This Question Too (0)
The specifications state that there are "two pairs of pre-amp outputs" - as pictured, I only see one...Can someone verify how many outputs there are? - In the picture, It looks as if it is one pair.
John M on Sep 26, 2016
Best Answer: there are 4 RCA inputs in the second picture for channels 1,2,3, and 4. the single pair of RCAs on the right are "Line Out" RCAs. this is a passive output to attach to additional amps. the RCA inputs receive the signal from the receiver then sends the signal to the speaker outputs. the outputs refer to the speaker outputs i believe and there are 4
Reply · Report · Charles H on Sep 27, 2016
· Add Answer · I Have This Question Too (0)
can alpine spr60 type r speakers handle the power of this amp at 4 ohms?
A shopper on Mar 23, 2015
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

PZX1800.4

UPC

806576223085

Weight

9.00lbs

Internal SKU

pzx18004

Internal Product ID

76946

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 PZX1800.4