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Pioneer GM-D8500M

1200W Max GM Digital Series Class D Monoblock Amplifier

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Pioneer GM-D9601

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Pioneer GM-D8500M

1200W Max GM Digital Series Class D Monoblock Amplifier

$199.95

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  • GM Series Class D Monoblock Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 300 watts x 1 chan.
    • 2 ohms: 600 watts x 1 chan.
  • Max power output: 1200 watts x 1 chan.
  • MOSFET power supply
  • LED power indicator
  • Wired remote bass level control included
  • Variable bass boost (0-12 dB at 50 Hz)
  • Compact amplifier design
  • Balanced isolator input circuit
  • Speaker-level inputs with included high-level to RCA adapter
  • Heavy duty aluminum alloy heatsink
  • Chrome-plated RCA level inputs
  • Chrome-plated screw terminals
  • Variable low-pass filter (40-240 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 10-240 Hz
  • Dimensions: 11-3/8"L x 7-7/8"W x 2-1/4"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 1-year SonicElectronix.com warranty

Product History:

Pioneer GM-D9601 thumbnail
(newest, current model)
Pioneer GM-D8500M thumbnail
(previous model, replaced by Pioneer GM-D9601)
Pioneer GM-D8400M thumbnail
(previous model, replaced by Pioneer GM-D8500M)

Power Specifications - Subwoofer Channel

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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
300 watts x 1 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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
600 watts x 1 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.
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.

D
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.
1 - Mono
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.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Not Bridgeable
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.
0.03%
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 - with included adapter
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.
No
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 - 240 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.
80 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.
Yes
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 
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.
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.

Specials with this Item

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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
85%
4 Star
12%
3 Star
3%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.8
Value
4.8
Features
4.4
Design
4.6
Usability
4.8
Tyler

Canada

Overall
Durability
Value
Features
Design
Usability
wicked amp!

June 26, 2012

i have this amp powering two 12" svc pioneer subs, 300watts rms each wired to 2 ohms in a 1.68 cubic foot box (for each sub) ported and tuned to 45 hz, and they slam so hard i cant even use my rear veiw mirror anymore, nor my side mirrors! my whole car shakes so much i cant even have a drink in my cup holder without some slpashing out! this amp is way under rated, would recomend to anyone who wants a fair priced amp that rocks very hard and does NOT need an alternator upgrade to power!

im running it with stock 105 amp alternator, new battery and big 3 upgrade with 4 gauge wire and no problems what so ever. and im powering 2 other amps for my 8 speakers also!

also! these things are tough as a rock! i also have the gm-d7500m amp and my trunk leaked a bit (fixed now haha) and when i opened up the trunk, the equivilent of a whole bucket of water spilled dirrectly on top of it, and no sparks, no shorts, no nothing! it was perfeclty fine! like it was right on top of it!

tough as a rock! buy it! you wont be sorry!

12 of 19 found this helpful

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Tyrus

Lawrenceville, PA

Overall
Durability
Value
Features
Design
Usability
amazing amp

March 18, 2012

This amp looks perfect and puts out amazing power, i have this powering 2 12" power acoustics and they SLAM. This amp looks amazing and produces awesome sound and doesn't over heat.

11 of 19 found this helpful

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Bruce

Australia

Overall
Durability
Value
Features
Design
Usability
Great sound

November 7, 2011

I bought 2 of these amps to run 2 pioneer 12 inch subs, they work great. Haven't turned them past normal setting and they crank hard. Excellent quality as you expect from pioneer.

12 of 21 found this helpful

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Frank

Dallas, TX

Overall
Durability
Value
Features
Design
Usability
Amazing

July 20, 2011

Great amp! Fits perfectly behind the rear seat in my truck! I have it powering a 10inch Alpine Type-S 1043D and it is a much happier sub with this amp. The bass controll knob is very nice, it doesn't give a "cheep" vibe. I would buy this amp again. I like that it's 2 Ohm stable that gives me room to upgrade the sub without having to upgrade the amp. I have had my System playing at full power for a 2.5 hour drive and the amps never quit once...

9 of 16 found this helpful

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Carlos Campo

Colombia

Overall
Durability
Value
Features
Design
Usability
Great sound

May 5, 2011

I got this Class D mono-block Amplifier connected to a sub which will deliver in 2 ohms: 600 watts x 1 chan. The sub is a 12" Dual 2 ohm Champion PRO Series Subwoofer Pioneer TS-W3002D2. The sound is GREAT..! The remote bass level control option is really good and needed.

If you are looking for quality this is a good option. Just make sure the Box has the Proper volume. I recommend a sealed box working at 50 db.

9 of 16 found this helpful

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illusions

Green Valley, AZ

Overall
Durability
Value
Features
Design
Usability
best amp ever

February 14, 2011

This amp rocks it powers 2 10" Pioneer perfect on my 2010 Charger RT

7 of 12 found this helpful

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Josh

Seal Cove, ME

Overall
Durability
Value
Features
Design
Usability
No Problems

April 2, 2010

I currently have this amp powering a Alpine Type R 12" sub woofer wired to 2 ohms. Runs very cool and I have had no problems at all with it.

7 of 12 found this helpful

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MauiBlueBandit

McHenry, Il

Overall
Durability
Value
Features
Design
Usability
Pioneer GM-D8500M & TS-W308D4

September 20, 2011

This amp, 2 pioneer 12s wired @ 1 OHM in a sealed box (overpowers them) . knocked my rearview mirror off and unbolted my hatch motor right off the car. So loud people complain their ears hurt from the sound pressure. No light dimming, over heating or anything. Next im replacing my stock speakers with pioneer A- Series and a GM-D9500F. PIONEER IS BEST. make sure you do not loose the remote cause without it the output is WEAK

8 of 15 found this helpful

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aaron8301

Port Orchard, WA

Overall
Durability
Value
Features
Design
Usability
Love. Pioneer. Amps.

August 12, 2011

This pushes my two Infinity Reference 12" subs like they were meant to be - hard and clean! The remote knob is much easier than constantly going into my head unit's menu to adjust the bass as well. I don't know how I ever lived without it.

12 of 23 found this helpful

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boss

valdosta, GA

Overall
Durability
Value
Features
Design
Usability
Great amp

August 9, 2011

Its a great amp but i didnt like it as much cause i wun push my 4 12's and they was only 300 rms and it sounded like garbarge so i just plugged it into my two 12's and they bang the seal around my trunk. I got a 2 door monte carlo.

8 of 15 found this helpful

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Austin

Cottage GroveCottage Grove, MN

Overall
Durability
Value
Features
Design
Usability
Great Amp.

May 20, 2011

I have this amp rockin 2 Renegade GTB2600 subs (both connected by one wire) The sound quality is better that great and the bass it kicks is next level. The bass contoller is a great feature and does get a lot of use.

9 of 17 found this helpful

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alex

texas

Overall
Durability
Value
Features
Design
Usability
Pioneer GM-D8500M

April 26, 2011

Great amp I have it powering a JL W6v2 12" and it sounds awesome and it comes with a wired bass knob

9 of 17 found this helpful

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Gary

Garden Grove

Overall
Durability
Value
Features
Design
Usability
Powerful, but turn-on click/thump?

March 21, 2011

I have this amp currently powering 1 Alpine Type-R 12" in 1.75cf Ported box. The amps definitely got the power. Bass in my Ford Explorer SportTrac is ridiculous.

One minor annoyance though... for some reason I get a turn-on click that plays thru the sub.

Seems to me like they should be able to handle that internally. I've read I'll need a delay triggering thing. A PAC-TR4 if I recall... to solve that issue. Doesn't bug me enough to fix it (yet!).

I've never had the amp be anything more than mildly warm. It's never gone into protect or anything like that.

I have a standard Duralast Gold 850 battery under the hood wired in parallel (with true 4 gauge) to a Kinetik HC600 that sits right next to the amps behind my rear seat. I did the Big 3 Upgrade in 4 gauge also.

7 of 13 found this helpful

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danny

springfield OR

Overall
Durability
Value
Features
Design
Usability
great value

September 8, 2010

I bought this amp 6 months ago and it worked very well pushed 2 jbl p1022 with it I had to switch to a more powerful amp due to the subs needing it but this amp is what it says it is CEA2006 compliant, which is all I buy. It came fast and in perfect condition too.

5 of 9 found this helpful

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Chad

Dinwiddie, VA

Overall
Durability
Value
Features
Design
Usability
Very Nice Amp

May 3, 2010

I have this amp hooked up to three 12" kicker comps, and it powers them nicely, around 2.6 ohms because of the 3 12s, it doesnt get hot at all, very clean bass, the bass knob also is a plus, Best bang for the buck

3 of 5 found this helpful

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Kamil

Oceanside, California

Overall
Durability
Value
Features
Design
Usability
Pioneer GM-D8500M

December 3, 2012

I dont have huge experience with car audio but I always preferred Pioneer brand. I got this amplifier in my 350z roadster and 10" TS-SW2501S4 1200W, 4 Ohm sub-woofer, to my stock Bose audio system. Cant ask for more, it is sweet. Also the amp stays cool all the time no matter how loud you are.

6 of 12 found this helpful

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Frank

Dallas, TX

Overall
Durability
Value
Features
Design
Usability
2nd one of these I've bought.

July 29, 2012

I got one of these back last year for a system and loved it. Now that I've moved on and got another truck it was time for another system. No questions asked I went straight back to Sonic and placed an order for another 8500 and all the goodies to hook it up. The first one I got was powering a 10in Alpine Type-S at 300w; this one is powering a 12in Alpine Type-R at 600W/2ohms and it's running strong with no issues. This little guy is tough too, I've got it mounted to the back of the seat in my SUV and I've had all sorts of stuff bang into it (not on purpose) and it hardly has a scratch on it.

6 of 12 found this helpful

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Thomas

Bluffton, SC

Overall
Durability
Value
Features
Design
Usability
WOW

December 29, 2011

Picked up one of these bad boys at wal**rt about a year ago. This amp is a beast for the size. 800 watts does not get any more powerful than this.
If you are looking for a good quality amp and a decent price, this is it.

8 of 16 found this helpful

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RON

Chambersburg, PA

Overall
Durability
Value
Features
Design
Usability
amazing sound

December 8, 2011

I've had this amp for over 6 months and its simply amazing for the price. Running 2 Alpine 300rms 10s under rear seat of my truck. Wired 2ohms and never over heats!

6 of 12 found this helpful

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torcher

Australia

Overall
Durability
Value
Features
Design
Usability
Pioneer GM-D8500M

November 14, 2011

I own a JL audio w3 sub. now if you know much about subs u know the w3 is a powerful sub. i bought the pioneer mono block to run a single w3 and it does the job marviously i would reccomend this amp to anyone looking for maximum power. Great product i have nothing to fault about the amp.

7 of 14 found this helpful

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Patrick

keansburg, NJ

Overall
Durability
Value
Features
Design
Usability
great amp

October 14, 2011

i bought the Pioneer GM-D8500M amp with Pioneer TS-W309D4 sub dam do they work great together. Sub hits hard and never over heats. I never had any problems with the products and i would recommend them.

6 of 12 found this helpful

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Garrett

St. Louis

Overall
Durability
Value
Features
Design
Usability
Pioneer Power!

June 20, 2011

I have this amp wired at 1 ohm on 2 15 inch Kicker CVR's and it pounds! Seriously a killer amp. I would reccomend it to ANYONE. Great buy from Sonic as well.

6 of 12 found this helpful

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H

GARDEN GROVE, CA

Overall
Durability
Value
Features
Design
Usability
Small but powerful

February 17, 2011

I bought this amplifier to compliment my alpine type r sub. My alpine sub can handle 600 rms and this was the only amplifier that could feed my sub 600 rms for the price that I was willing to pay.

This pioneer amp also satisfied my criteria for being a small amp that delivered a lot of power. I didnt have a lot of room in my extra cab truck, so this small size was definitely a plus. I have this amp nicely tucked away under my seat.

the only downside i can think of that it doesn't have high pass filters, which is what you want in an amp if your sub is enclosed in a vented box. But you can purchase an fmod that attaches onto your rcas to match the hz that your vented box is tuned to.

9 of 18 found this helpful

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Ryan

Kent, WA

Overall
Durability
Value
Features
Design
Usability
Great little amp!

October 16, 2010

I originally bought this to run a 350w RMS D4 Premier 10in sub, and damn it powered it with no problem! I actually had to keep the gain below "Normal" because of my high 4v pre outs and it was pushing that sub to its limits. It's a pretty basic amp, but It's easy to use and stays real cool. It's never gotten hot, even after a 2 hour drive working hard it was just warm. I'd recommend 8guage wire or better. I'd say it's worth the money! Thanks sonic. :P

4 of 8 found this helpful

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Don

Canada

Overall
Durability
Value
Features
Design
Usability
Pioneer GM-D8500M

November 22, 2011

Clean sound, great looking, recommended.

9 of 19 found this helpful

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vanzee

Australia

Overall
Durability
Value
Features
Design
Usability
awsome

October 31, 2011

This amp is great im using in my wrx with 2 10" subs nice bass sound easy to use and install highly recommended.

5 of 11 found this helpful

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?

los angeles, ca

Overall
Durability
Value
Features
Design
Usability
Reliable quality!

September 7, 2011

There is a reason why all Lexus cars have this amp in their cars. Any radio attached to this amp will sound even better.

8 of 17 found this helpful

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abhijit

India

Overall
Durability
Value
Features
Design
Usability
Great sound quality

February 10, 2011

great sound quality and good value for money, features are latest

6 of 13 found this helpful

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Gary

Garden Grove

Overall
Durability
Value
Features
Design
Usability
Excellent clarity. Great power. ?Turn-on thump?

September 23, 2010

I bought this GM D8500M for the purpose of replacing my HITRON HA-1000.1. I'm powering a single 12" Alpine Type-R 4Ohm DVC. When I finally hooked-up the bass remote and I scared myself because I was actually able to make the TypeR bottom-out on this bass-intensive song with some knob added. You seriously almost never need to add any bass boost with that the knob. I think adding the remote knob has introduced a turn-on thump through the sub. Although it's not really a thump, more like a tick. very muted.. but still kinda made me upset. will test if disconnecting the remote makes it go away. Even if it doesn't it's not a deal breaker because this thing sounds so good compared to the HITRON.
I'm now guessing that the HITRON is most likely more in the realm of 400W RMS rather that the 600 RMS it claims at 2 Ohm load.
Also replacing the HITRON with this amp seems to have made my other problem go away where my other Pioneer GM-D9500F 4ch amp was having issue of highs/mids fading out at high volume playback of certain bass-intensive songs. I can only guess that the HITRON was also inefficient and power hungry and probably robbed the 4ch amp of some power it was needing.
Only other gripe is I wish it had Allen screw connectors. I'll knock off some points of Look/Design, Features, Ease of Use because of that.

3 of 7 found this helpful

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kiley

greensboro, PA

Overall
Durability
Value
Features
Design
Usability
not that good

February 23, 2012

I had it powering a jl w6 and it just wasnt enough. Even though they said it would be nice little amp if your powering a small sub though

7 of 16 found this helpful

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JAMES

JACKSONVILLE, FL

Overall
Durability
Value
Features
Design
Usability
Second Time Buyer

August 19, 2012

Owned this amp before, had it powering a 12" Orion Cobalt (CO124S) and it made some of my buddies' cars with 2 12s sound like nothing!! This was definitely a go to when I thought about what I was going to do next.

3 of 9 found this helpful

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Murc

SoCal

Overall
Durability
Value
Features
Design
Usability
Better than my kicker DX

November 25, 2011

I replaced a kicker amp with this and very happy with it. Good power and it sounds very nice for a fraction of what the kicker amp costs.

6 of 15 found this helpful

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RICHARD

UKIAH, CA

Overall
Durability
Value
Features
Design
Usability
Great Power

August 8, 2011

This amp pumps the perfect amount of power to my RE sex sub. Best price for this amount of power.

7 of 17 found this helpful

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dtay

fort wayne

Overall
Durability
Value
Features
Design
Usability
great product

March 31, 2011

Had no problem with it pushing my Pioneers....does the job

5 of 13 found this helpful

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Product Summary

Manufacturer

Model Number

GM-D8500M

UPC

012562969916

Weight

8.50lbs

Internal SKU

gmd8500m

Internal Product ID

22154

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-D8500M