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Pioneer GM-A5602

450W RMS 2-Channel GM Series Class AB Bridgeable Car Amplifier

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List price $179.99

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Save 15% on a 4 Gauge Amp Kit with Purchase!

You will need an amp kit to install your amp, and the Belva BAK42 is the perfect kit for this amp. For a limited time, when you click "Add Both to Cart", you'll receive 15% off the amp kit. This offer cannot be combined with any other coupons or offers.




Pioneer GM-A5602



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Belva BAK42BL (Blue)


Special Price $25.49 ($29.99 if purchased separately)

Belva BAK42BL (Blue)

• Complete 4 Gauge 2-Channel Amplifier Installation Kit
• Designed Specifically For Car Audio Systems Up to 1000 Watts RMS
• Premium Power and Ground Wire Provides Optimal Power Transfer
• 30% Copper CCA Wire

(Offer 1 of 1)

Combined Total Price


You Save $4.50

General Features:

  • GM Series 2-Channel Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 150 watts x 2 chan.
    • 2 ohms: 225 watts x 2 chan.
    • Bridged, 4 ohms: 450 watts x 1 chan.
  • Max power output: 900 watts x 1 chan.
  • Switchable Bass Boost (0/+6/+12 dB bass boost at 50 Hz)
  • 2 or Mono channel operation
  • Speaker-level (high-level) inputs with signal sensing for automatic turn-on
  • Variable low-pass filter (40-500 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • 4 gauge power and ground wiring is required for installation
    • Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier
  • Dimensions: 13-3/4"W x 8-1/2"L x 2-1/2"H
  • 1-year Sonic Electronix Warranty

Product History:

Pioneer GM-A5602 thumbnail
(newest, current model)
Pioneer GM-5500T thumbnail
(previous model, replaced by Pioneer GM-A5602)
Pioneer GM-5400T thumbnail
(previous model, replaced by Pioneer GM-5500T)
Pioneer GM-5300T thumbnail
(previous model, replaced by Pioneer GM-5400T)

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.

150 watts x 2 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.

225 watts x 2 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.

450 watts x 1 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.
GM Series (Pioneer)
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.

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.
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.
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
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
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.
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.
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)
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.

40 - 500 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
95 dB
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 - 12 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.
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 2 
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.
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.


Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


San Francisco/Peninsula, CA

Who doesn't like to save money ?

October 3, 2014

Great products at great prices. Nothing more important to say than that.

21 of 40 found this helpful

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Greeneville, TN

Powerful little amp! Gets pretty warm though.....

March 19, 2014

Okay this is a long review, but i like to study electronics before I buy them so I'm going to try to give a helpful over-all review here for the other people like me. I bought this amp to put in my fiances car. 1992 Toyota Corolla. Between my dad and I, we have owned every model of this Pioneer GM series two channel amp. This is by far the loudest. The wattage ratings for it are definitely accurate. I have it paired with a Pioneer TS-W310S4 (1,400 watts max and 400 rms) running 4 ohms bridged @ 450 watts rms in a vented Belva enclosure. I have installed many stereo systems for family and friends and i am a bit of a car audio enthusiast. This little amp is LOUD. it says it runs 450 watts rms bridged and I know it does every bit of that. I have had Pioneer, Kenwood, and Hifonics amps. I currently have a Hifonics BRX1100.1D running two Kenwood KFC-W3013PS subs running 2 ohms @ 800 watts rms in the back of a 2001 Chevy Impala. This little set up in my fiances car is just as loud as my set up. With the back seat down in her car, its even louder than mine. This amp is very precise and loud with no signal clip or distortion. Beware though, it WILL get hot running it hard for a while. It has no cooling fan. That's why I gave it four stars in some places. I haven't had it kick into protect yet though. Even when it gets hot it doesn't lose power like my Kenwood amp did. I have always been a firm believer in Pioneer products. I replaced all the factory speakers and head unit in both our cars with Pioneer products. Even added some pioneer Tweeters In both cars so the full range would be just as loud as the low frequencies. Over all, you can't go wrong with this amp or any Pioneer products. Sonics low prices and very fast shipping is just icing on the cake.

22 of 42 found this helpful

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I'm Funkingitup

Houston, TX

Great little amplifier!

December 30, 2014

This is a great little amplifier. I am using it to drive a a pair of component speakers mounted in the front doors of my vehicle. The speakers are rated at 90w x 2 RMS. I had originally tried to power them with an Alpine MRP-T130 that provided 50w x 2, but at higher levels the amp was entering protection mode. This amp is lightweight, but more than powerful enough at 150w x 2 @ 4Ω. The power easily provides excessively loud levels without any perceived distortion for hours on end. I feel that this product represents the best value of any stereo amplifier in this price segment.

- CEA-2006 compliant
- Powerful
- Clean (great for highs or subs)
- Very reputable and experienced brand
- Light (improved gas mileage and performance for vehicle)

- No single-band parametric EQ if using for a subwoofer
- No remote bass knob for subwoofer
- No high-pass crossover
- Not 1Ω stable (but you shouldn't expect that in this price range)
- Light (Class AB amps tend to be heavier with greater quality amps, but no problems so far)

20 of 39 found this helpful

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Verified Purchase
sounds amazing!

May 3, 2015

had the system installed professionally on my 2013 lancer and it slams coupled together with all other pioneer component speakers and subs. Sonic Electronix has the best price and shipping time and everything was delivered of course perfect condition. I would definitely purchase from here again especially Pioneer the sound quality is amazing!

7 of 14 found this helpful

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Yakima, WA

Good cheap amp.

November 8, 2014

Bought this to power my Pioneer TS-SWX2502, 10" sub. Works fanstasic bridged. It gets warm but never hot enough to trip out. Have yet to hear the bass distort/clip, even blasting it as loud as I can stand.

Great amp for the price, it looks well made.

20 of 41 found this helpful

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Best amp

March 2, 2015

Best amp you'll ever own . I install it and never had problems , I love pioneer products . 5 star amp

11 of 26 found this helpful

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Accessory Tools and Products

Accessories added

Stinger SK4641 4 Gauge Wiring Kit

Get a high quality amp kit from Stinger to get the most from your new amp!

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Belva BAK42 4 Gauge Amplifier Installation Kit

Great amps need great wire at a great price. This amp kit has everything you need!

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NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

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

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Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

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Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

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Small Universal Remote Level Bass Control

The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.

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StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

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NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

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Kicker KI24 K-Series RCA Audio Interconnect Cable

4 Meters (13 ft.) 2-Channel K-Series RCA Audio Interconnect Cable

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NVX XWS1225 12 AWG Speaker Wire

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

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

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Belva BBSW127 12 AWG Speaker Wire

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

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Belva BBSW167 16 AWG Speaker Wire

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

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The Install Bay IB-CAP1F

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

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e2 ECAP1 by Scosche - Mid-Level 1 Farad

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

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Rockford Fosgate RFC1D - Top of the Line 1 Farad

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

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SMD DD-1 Distortion Detector

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Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

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Browse 3 questions and 9 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
It was a perfect match for my JBL GTO608C speakers.
Glenn B on Dec 8, 2014
good price
JULIO M on Sep 3, 2014
"Value and trusted brand"
Chris R on Oct 25, 2014
Cheapest price for the power of amp from a reputable brand. Sonicelectronix picked because - allegedly in stock, one year warranty despite not being an authorized dealer. I am disappointed in the long shipping time. It needs to get down to 3 days.
Daniel S on Aug 12, 2014
I have this exact same sub hooked up with a pioneer GM A5602 with 8 gauge cables on a sealed enclosure. I'm getting a weird burning smell when playing at high volumes. What can be the cause of this?
Michael F on Dec 11, 2014
Pioneer GM-A5602
Pioneer GM-A5602
Pioneer TS-W304R
Pioneer TS-W304R
Best Answer: without actually seeing your set up, the best I could tell you is to take a look at your power and speaker wires. may have some breaks that are causing the wire to get hot. Could also check the mounting point for your amp, if your not getting proper air flow to keep the amp cool, or if its mounted on something that cant handle a little heat.
Reply · Report · David M on Dec 12, 2014
· Add Answer · I Have This Question Too (0)
will this amp run a pioneer TSSWX2502 subwoofer?
A shopper on Jun 25, 2015
Best Answer: Hello,

Yes, but the amplifier will need to be 'bridged' . Consult the manual for details on doing so.
Reply · Report · Rick MStaff on Jun 26, 2015
· Add Answer · I Have This Question Too (0)

Product Summary


Model Number






Internal SKU


Internal Product ID


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: Pioneer GM-A5602

  • Pioneer GM Series Car Amplifiers
  • How to Install a Car Amplifier