Pioneer GM-D8604-OPEN BOX

600W Class FD 4-Channel GM Digital Series Amplifier

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This item has been discontinued

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General Features:

  • GM Digital Series 4-Channel Class D Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 100 watts x 4 chan.
    • 2 ohms: 150 watts x 4 chan.
    • 1 ohm: 125 watts x 4 chan.
    • Bridged, 4 ohms: 300 watts x 2 chan.
  • Max power output: 600 watts x 2 chan.
  • Pulse Width Modulated MOSFET power supply
  • LED power (green) and protect (red) indicators
  • 4/3/2 channel operation
  • Speaker-level (high-level) inputs with signal sensing for automatic turn-on
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • High-density split-dome convection heat-sink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Input sensitivity:
    • Low level: 200mV-6.5V
    • High level: 0.8V-16V
  • Variable high-pass filter (40-500 Hz, 12 dB/octave)
  • Variable low-pass filter (40-500 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 40-50,000 Hz
  • 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: 10-7/16"W x 2-3/8"D x 7-7/8"H
  • 1-year Sonic Electronix 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.

100 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.

150 watts x 4 channels
RMS Power @ 1 ohm

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 1 ohm, 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.

125 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.

300 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.

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.

Peak Power @ 1 ohm
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.

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.

Power Specifications - Subwoofer Channel

Peak Power @ 4 ohm
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.

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.

Peak Power @ 1 ohm
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.

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 Digital (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.

FD
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.

1200 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.

600 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.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
1 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.
.05%
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.

40 - 500 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.

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/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).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
30A x 2 
Total Fuse Rating
The total amperage an amp requires.
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.

Yes
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.
Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
Hi-Res Audio Compatible
This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.

What is in the box?

WITB: Amplifiers
A detailed list of the equipment (main product and accessories) included with your amplifier. If special accessories are included in the box, they will be listed and detailed below the main list of equipment.
Other Accessory #1
Standard accessories are included in the main list above; however, this line provides specific details on an additional, unique accessory that is included with the product.
Other Accessory #2
Standard accessories are included in the list above special accessories; however, this line provides specific details on an additional, unique accessory that is included with the product.
Other Accessory #3
Standard accessories are included in the list above special accessories; however, this line provides specific details on an additional, unique accessory that is included with the product.
Other Accessory #4
Standard accessories are included in the list above special accessories; however, this line provides specific details on an additional, unique accessory that is included with the product.
Other Accessory #5
Standard accessories are included in the list above special accessories; however, this line provides specific details on an additional, unique accessory that is included with the product.
Paperwork
Paperwork included with the product.

Warranty and Return Policy

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

Summary of Customer Ratings & Reviews

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Accessory Tools and Products

Accessories added

Belva BAK44 4-Channel 4 Gauge Amplifier Installation Kit

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4-Channel 100% OFC Complete True 4 Gauge Amp Kit with RCA Cables and Speaker Wire

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T-Spec V8-4DAK 4-Channel 4-Gauge Wiring Kit

Get everything you need to hook up your new amplifier!

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NVX Universal Remote Level Bass Control

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

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Universal Remote Bass Level Control Knob

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

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Kicker 4-Channel RCA Audio Interconnect Cable

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

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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

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NVX V-Series RCA Interconnect Cable

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

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NVX XIX45 X-Series RCA Interconnect Cable

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

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NVX XWS1225 12 AWG Speaker Wire

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

Your Price $39.99

NVX XWS1625 16 AWG Speaker Wire

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

Your Price $17.99

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 $39.99

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

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

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

240 Amp cutting edge 6 phase hairpin epoxy reinforced stator technology

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

Specifically designed to fit in tight spaces

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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

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240 Amp S Series Alternator for 2011 Toyota Corolla

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

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240 Amp S Series Alternator for 2006-2011 Honda Civic

15% more efficient than typical alternators

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

WOW 370 AMPS! Elite series offers the highest possible amperage

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NVX XCAP1F

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

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Belva BB1D

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

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NVX XTGSP2

Perfect for safely troubleshooting and testing audio systems

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SMD DD-1 Distortion Detector

Set your gains like a Pro, accurately and quickly

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Scosche TK12

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

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Five Piece Installer's Panel Removal Tool Kit

Remove panels the right way (Durable Nylon Plastic Pry & Chisel Tool Set

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Universal Wire Puller

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

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4 Gauge Ring Terminals, 5/16" Opening

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

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

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

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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

500 Amp Relay Isolator (BIR500)

Does not create a voltage drop to the second battery like conventional isolators

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120 Amp 4-Post Battery Isolator

Prevents primary battery discharge and extends battery life

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240 AMP 3-Post Battery Isolator

Prevents primary battery discharge and extends battery life

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World's Smallest AFS / Mini ANL Fuse Holder

Accepts 4 gauge or 8-gauge wire

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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 $5.99

4 Pack of 100 Amp Nickel-Plated MANL Fuse

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

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2 Pack of 100 Amp Nickel-Plated ANL Fuse

ANL 100A Nickel plated for better power transfer

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2 Pack of 200 Amp Nickel-Plated ANL Fuse

Two fuses per order. High quality 200 Amp ANL Fuses

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2 Pack of 300 Amp Nickel-Plated ANL Fuse

Two fuses per order. High quality 300 Amp ANL Fuses

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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

Browse 19 questions and 81 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
pioneer is the best option in car audio amplifiers
Favio M on Jul 16, 2017
My whole inside was to be by pioneer it's a great brand
Kevin B on May 29, 2017
Good Brand
Mascelles m on Jun 13, 2017
BRAND NAME, BEST POWER
Thomas B on Apr 27, 2017
how at 2 ohms its 150rms but at 1 ohms its 125rms?
taylor y on Aug 29, 2014
Best Answer: Normally you're right...power output does increase as impedance (ohms) drops. Yours are the same specs that Pioneer gives on their site. The best explanation I can find is in the last sentence of the following paragraph. Hope this helps. ((( High Current Amps:
Many people think that a car audio amplifier has to be bridged into a low impedance load (2 ohm mono) in order to produce a lot of power. Well, this isn't necessarily true. Some large high current amplifiers are designed with a relatively low rail voltage. These amplifiers would need a low impedance load (2 ohm mono or 1 ohm stereo) to produce their maximum power output. Other amplifiers have a relatively high rail voltage and will produce full power in a higher impedance such as 2 ohm stereo or 4 ohm mono. There is no impedance which can be considered best for all amplifiers. You must know what the amplifier was designed for, to know what load will produce the most power output. ))) Looks like this amp was designed to make max. power @ a 2 Ohm load. I can tell you that I connected this amp to (4) Pioneer TS-D6802R speakers, 1 on each channel, 2 in front doors and 2 in rear xtra cab side panels and it sounds incredible!!! The amp runs cool... One of the best setups I've ever seen at this price level! Don't skimp on wire, get heavy enough wire for all connections!!! Very important!!
Reply · Report · Steven K on Aug 30, 2014
· Add Answer · I Have This Question Too (1)
I want to connect 2 component speakers running at 90 watts rms each at 2 ohms on channel A which is channel 1 and 2. Then I want to bridge channels 3 and 4 to get the 300 watts rms at 4 ohms but I'm confused on connecting channel B at 4 ohms to 2 x 4 ohm subs. I need help? I want to connect two speakers and 2 subs. I need to know what kind of subs to get like for example: Do I get 2 x 4ohm DVC and wire and bridge channels 3 and 4 on the amp? I'm not sure which ohm load and if svc or dvc to get?
ep712 on Jan 25, 2016
Best Answer: Hello,

Bridged, 4 ohms: 300 watts x 2 chan. isn't very much power in and of itself. Divide that into two subwoofers, and you will only be getting ~150w RMS to each subwoofer. This might be what you're looking for, but based on you confusion, we fear that this may not be the performance you seek. Feel free to correct us :) . Now, to the wiring....you have a few options - neither is "better" than the other, they are all the same, just different configurations.

1A) Two Single 2ohm subs. - (Easiest) Here, you can give each sub its own channel

1B) OR you can wire them in series and bridge the amp...this would be pointless and more work than needed, as you are getting the same result as option 1A, but it is up to you.

2) Two Dual 4ohm subs. - Here, you wire the subs in series/parallel and bridge the amp.

3) Two Single 8ohm subs - Here, you wire the subs in parallel and bridge the amp.

Obviously, whatever subwoofer you chose, must only need ~150w rms. (e.g. Two 150W RMS Single 2ohm subs).

We highly recommend seeking a professional installer if this still goes over your head, OR ask us to elaborate on ONE of the above.
Reply · Report · Rick MStaff on Jan 25, 2016
· Add Answer · I Have This Question Too (1)
Are the RCA connections SE Single Input or Differential Input on GM-D8604?
Todd H on Jul 14, 2015
Best Answer: Sorry, 1st answer didn't post. They are single ended (SE). A test on my amp with an ohm meter indicates continuity between the RCA shield and the vehicle ground. This would not be the case if they were differential inputs. I used good quality coaxial RCA patch cables and have ZERO noise. More important to separate your power and speaker wiring and route them away from existing vehicle wiring than to insist on differential inputs, also never coil up extra wire. Try to use proper lengths. Fold it back on itself if you have to, NO COILS!!! I love this amp. It powers (4) Pioneer TS-D6802R speakers, sounds awesome!!! Hope this helps, Steve
Reply · Report · Steven K on Jul 15, 2015
· Add Answer · I Have This Question Too (0)
Can someone suggest which is the right one to go for out of Pioneer GM-D8604, NVX JAD800.4 or PPI 900.4 in terms of sound quality and reliability?
Omair K on Mar 22, 2017
Pioneer GM-D8604
Pioneer GM-D8604
Precision Power P900.4
Precision Power P900.4
NVX JAD800.4 Open Box Complete
NVX JAD800.4 Open Box Complete
Best Answer: Can't comment to the NVX or Pioneer, but I have 2 PPI 900.4's that sound clean and have been rock solid. Frankly, I think most modern amplifiers from reputable companies produce sound of high enough quality that even the most discerning of ears couldn't tell the difference (particularly in an automobile). Get the amp that has the features you want (I picked the PPI for its power rating and the on-board crossovers as it simplified my 3-way front stage). Best of luck!
Reply · Report · Terry O on Mar 22, 2017
· Add Answer · I Have This Question Too (0)
what guage speaker wire for this amp?
A shopper on May 20, 2015
Best Answer: I use 12 AWG, and it works great. The amp will accept I think 10 to 18 and be okay. Just be careful using a smaller wire with a higher power output amplifier! When in doubt, use the heavier wire.
Reply · Report · Jacob H on May 21, 2015
· Add Answer · I Have This Question Too (0)
hi,

I have read a lot reviews about Pioneer GM-D8604 my question is can i hook up this amp to mitsubishi galant 2010 with out rock ford kit ?. do you think the car alternator supports the amp ?Please guide me.
Thank you.
Jayendra.
jayendra v on Jan 15, 2017
Best Answer: Thank you, i would like to fix it on factory oem head unit with line out put controler preferably NOXPLOC4 .the amp would be the same and would like to hook front 2 component speakrs with 100 rms out put each and at the rare 2 coaxial speakers 100 rms each.And fix with sound dampening. do you think this gives me a descent sound.
Reply · Report · jayendra v on Jan 18, 2017
· Add Answer · I Have This Question Too (0)
Can this amp do 2 ohm on 1 channel and 4 ohm on another channel????
Sambath K on Apr 10, 2016
Best Answer: Hi there,

This Amp cannot run different channels at different Ohms.
Reply · Report · Nicky Patel on Apr 11, 2016
· Add Answer · I Have This Question Too (0)
I have a Pioneer GM D9601, GM D8601, and two GM D8604, what would be a good amp wiring kit that will power these amps sufficiently?
Xerxes on Jun 24, 2015
Pioneer GM-D8604
Pioneer GM-D8604
Pioneer GM-D9601
Pioneer GM-D9601
Pioneer GM-D8601
Pioneer GM-D8601
Best Answer: I don't think they make a good enough wiring kit. You'll have to make your own. I bought 20' of power & ground (0gauge) wire from NVX. I ran that to their distribution blocks. Then used their 4 gauge wire to hook up 2 gm-d9601 & a gm-d8604. I fused it with a kicker 300amp fuse before the block & a 200amp fuse to each amp after the block. No troubles with wiring heating up & everything works great. NVX big 3 bundle is also good. Have the xs-d3400 under the hood & eventually a xp series battery in the back.
Reply · Report · Adolfo A on Jun 24, 2015
· Add Answer · I Have This Question Too (0)
I got another question. Can you have multiple ohms at the same time? For instance, channel 1 and 2 at 4 ohms and the other two at 2 ohms. Or three at 4 ohms and one at 2 ohms.
taylor y on Sep 1, 2014
Best Answer: Yes. For example, if you are running your front speakers off channels 1 and 2 at 4 ohms and are bridging channels 3 and 4 for a subwoofer (also at 4 ohms), channels 3 and 4 actually see 2 ohms each. If you are running regular speakers off of all four channels, note that the lower impedance channels will see more power than the other channels (and typically produce more volume), given the same gain setting. But it is perfectly fine to do this.
Reply · Report · Brenton R on Sep 10, 2015
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Would like to run this amp on my motorcycle. Yamaha royal star venture. what do you suggest?
A shopper on May 6, 2017
Best Answer: Ive had a lot of luck with this amp. It packs a lot of power in a small package. I'm running four 6.5 inch speakers paired with one kicker solo baric 12inch (running at 750rms) and this has no trouble keeping up. I have no doubt that this will give you plenty of quality sound over all of that wind noise!! best of luck
Reply · Report · james f on May 8, 2017
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I'm thinking of running Polk MM571's in the front doors and Rockford Fosgate T-1682 Power's in the rear....The Polks are (3) ohm and the Rockfords are (4) ohm....Is this a problem???
Randy B on Jun 22, 2016
Best Answer: The amp is stable down to 2 ohms so there is no problem there. Running different olm loads on the amp can make it wear a little faster but nothing extreme. I ran 2 olm fronts and 4 olm rears for a little over a year before switching speakers, the amp is still running strong.
Reply · Report · Eric D on Jun 22, 2016
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Is it possible to run 2 4 ohm subs on this amp? They are 200w RMS
Jake C on Jun 15, 2015
Best Answer: Hello Jake,

We HIGHLY recommend going with a monoblock, which are intended for subwoofers, especially if you aren't familiar with car audio set ups. However, this amplifier can be Bridged to 4 ohms providing 300 watts x 2 chan, making it fairly ideal for two Single-4ohm drivers asking for >200w . Give our sales team a call for further assistance.
Reply (1) · Report · Rick MStaff on Jun 15, 2015
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can i hook up two pioneer GM-A6604 using both amps speaker level inputs wiring them both to my pioneer headunit or will it be to much for the headunit?
kurt t on Dec 6, 2014
Best Answer: Hello,

The system will work, in theory. The problem here is, that you will be Splitting the signal, and therefore dramatically degrading the overall performance. I suggest researching the Audiopipe SPLIT-3003. That will allow you to go from One Full Set of RCAs, and Properly Splitting to three Full Sets of Outputs . In addition, this unit will also act as a line driver, so you DO NOT lose the quality of the signal, from splitting it.

SPLIT-3003
http://www.audiopipe.com/index.php?route=product/product&product_id=200
Reply · Report · Customer SStaff on Dec 6, 2014
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Is the Amp Pioneer GM-D8601a good match with the subwoofer Pioneer TS-W106M?
A shopper on Dec 16, 2016
Pioneer GM-D8604
Pioneer GM-D8604
Pioneer TS-W106M
Pioneer TS-W106M
Best Answer: It could power that sub, but it would be kind of a janky setup as far as wiring goes. While that amp can be used to power one sub, it's truly meant to power 4 door speakers. I'd recommend its equivalent monoblock, the GM-D8601. Much simpler wiring, and will be doing the job it's meant for! I personally use the larger version, the GM-D9601, for my setup, and I love it.
Reply · Report · Jacob H on Dec 16, 2016
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I would like to use this amp with a 2014 Honda Accord OE head unit using high level input. What is the best solution for no remote or power antenna turn on lead with my factory head unit? Is it best to look for an amp with auto sensing on the high level inputs? Any advice would be great, thank you.
Andrew J on Dec 15, 2016
Best Answer: This amp has Speaker Line Input Turn-On Sensor so you would not have to run a remote turn on lead from a high to low level adapter. As long as you tap into the speaker wire leads with the supplied high to low adapters it will automatically turn the amp on.
Reply · Report · Cesar V on Dec 15, 2016
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I was wanting to connect this amp to four door speakers in my car, but I do not want a head unit. I wanted to run an aux cord to the amp connected to my phone, but I see that there are two input channels (A and B), so if I connect my rca-to-aux to one of the channels, the other channel will not receive sound? Or will I need an rca splitter? Thanks!
keegan m on Jun 6, 2016
Best Answer: Hi Keegan,

Due to various voltage variables we can't guarantee that your output is going to be on par with what you expect. Moreover, we DO NOT suggest splitting the signal with a splitter; doing so will Also split the quality of the signal you are sending, which we've already said is a variable we can't determine. Instead, we suggest sending the signal to something like the NVX XEQ7, which can take your ONE output, even with an auxiliary source (like your device), and provide you with all the outputs you need:

http://www.sonicelectronix.com/item_46587_NVX-XEQ7.html
Reply · Report · Rick MStaff on Jun 6, 2016
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I want to connect the amp to both my head unit (speaker-level out) as well as my Hi-res portable media player (line out level). Are there any input selector to mount on the dash to switch between inputs?
My head unit has no AUX in.
Tue N on Apr 4, 2016
Best Answer: Hello,

There is no such switch for that specific purpose. However, we suggest taking a look at the Clarion EQS746, which will give you the ability to include an auxiliary source to the system. The draw back here is that you will - obviously - need to find a place to install it.

http://www.sonicelectronix.com/item_6655_Clarion-EQS746.html

Alternatively, you can use a universal Auxiliary Integration kit, but these tend to degrade the quality of the audio: EX, http://www.sonicelectronix.com/item_41679_iSimple-IS32-Tranzit-USB.html
Reply · Report · Rick MStaff on Apr 4, 2016
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The whole point of buying this amp is so that I can power my infinity kappa 60.11cs component speakers. They are 90 watts rms @ 2 ohms each and I have two. I would wire them separately to channels 1 and 2 and get 150 watts rms @ 2 ohms to them each. I know that is a lot of watts but I read you can over power your speakers up to 150% which would be 135 watts rms so I'm only over by 15 watts rms. Ok the other reason I want to buy this pioneer amp is because I want to put 2 x 8" subwoofers at 150 watt rms each then I would bridge them to channel B which is channels 3 and 4 at 4 ohms. The main reason is I don't have a lot of room behind the back seat of my pickup truck to fit a big subwoofer box and secondly I don't want to buy a second amp and also the infinity kappa speakers are really nice but don't offer the low bass. so if this helps to clarify my answer I would like to know the best 8" subs to get to do what I'm looking for. Thanks. I just need to know what 8" subs to buy to work with this amp for example: do I buy 2 8" DVC 4 ohm subs at 150 watt rms each? I hope this helps and thank you for your time.
ep712 on Jan 25, 2016
Best Answer: Hi Erik,

The previous reply stands as true.

1A) Two Single 2ohm subs. - (Easiest) Here, you can give each sub its own channel

1B) OR you can wire them in series and bridge the amp...this would be pointless and more work than needed, as you are getting the same result as option 1A, but it is up to you.

2) Two Dual 4ohm subs. <--- Yes, you can do that.

3) Two Single 8ohm subs
Reply (1) · Report · Rick MStaff on Jan 25, 2016
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Product Summary

Manufacturer

Model Number

GM-D8604

Weight

6.50lbs

Internal SKU

LS-gmd8604-OB

Internal Product ID

89786

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-D8604-OPEN BOX

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