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Pioneer GM-D8604

600W Class FD 4-Channel GM Digital Series Amplifier

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$104.99

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General Features:

  • GM Digital Series 4-Channel Class FD 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
  • 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

Specifications

Second Depth
The second depth is used only when the box is slanted or angled. This value is the top measurement and it is measured in inches.
Depth
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
Height
The height of the item, measured from top to bottom, in inches.
Width
The width of the item from left to right (side-to-side) measured in inches.
Color
Color of handle.

Warranty and Return Policy

Parts Warranty Duration
90 days
Labor Warranty Duration
90 days
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

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Browse 14 questions and 56 answers
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Why did you choose this?
Sonic Electronix Store
Pioneer is a decent brand and this amp has what I need to power my speakers
sabrina j on Dec 3, 2016
Pioneer makes pretty good amps and I need an upgrade, I'm replacing my 16 year old Jensen amp, still working fine but I need an upgrade.
kent f on Jan 8, 2016
Amp puts out nice clean power.
Vik S on Jun 23, 2016
Good value for the price.
Ramiro G. G on Nov 7, 2015
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
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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
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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
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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
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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
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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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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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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-obc252047

Internal Product ID

121193

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