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Pioneer GM-D7500M

Mono car amplifier — 400 watts RMS x 1 at 2 ohms

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Item #: 130GMD750M
 

Review Summary

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Original price $199.99
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Our take on the Pioneer GM-D7500M

by Buck Pomerantz
Pioneer

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Upgrade your in-car listening experience with a Pioneer GM Series amp — it'll provide the power and sound quality you're looking for, all in a reliable package you can count on. Under the hood, solid construction eliminates resonant vibrations that can cause distortion, while an efficient cooling system keeps the amp running clean when it's working hard. Pioneer uses Class D amp technology in this GM Series amp to deliver maximum power from a chassis that's half the size of their conventional models.

The GM-D7500M mono amplifier produces plenty of raw energy to drive your subs, delivering a tight, satisfying kick of up to 400 watts RMS. The variable low-pass filter allows you to tune your sub/box combo for maximum performance, while the selectable bass boost adds more thump when you want it. The GM-D7500M includes preamp and speaker-level inputs so you can connect it to almost any system, even a factory stereo.

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Highlights:

  • mono car amplifier
  • 200 watts RMS x 1 at 4 ohms (400 watts RMS x 1 at 2 ohms)
  • variable low-pass filter (40-240 Hz, 12 dB/oct)
  • selectable bass boost (0, 6, 12 dB at 50 Hz)
  • CEA-2006 compliant
  • Class D amp technology and MOSFET power supply
  • preamp- and speaker-level inputs
  • fuse rating: 40A x 1
  • requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
  • 9-3/4"W x 2-1/4"H x 7-15/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Performance
RMS Power Output (Watts x Channels)
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200 x 1
Peak Power Output (Watts x Channels)
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800 x 1
Power at 2 Ohms (Watts x Channels)
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400 x 1
Bridged Power (Watts x Channels)
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---
Minimum Impedance Bridged
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---
Minimum Impedance Unbridged
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2
Best Frequency Response
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10-30k Hz
THD at Rated RMS Power
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1%
Signal to Noise Ratio
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72 dB
Input Voltage
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14.4v
Features
Amplifier Class
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D
Low-Pass Crossover Frequency
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40-240 Hz
Low-Pass Slope (dB/octave)
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12dB/oct
High-Pass Crossover Frequency
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N/A
High-Pass Slope (dB/octave)
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N/A
Bass Boost
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0dB, +6dB, +12dB
Bass Boost Frequency
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50 Hz
Fan Cooled
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No
Fuse Rating
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40
Speaker Level Inputs
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RCA
Preamp Outputs
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No
Width (inches)
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9-3/4
Height (inches)
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2-1/4
Depth (inches)
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7-15/16
Parts Warranty
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1 Year
Labor Warranty
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1 Year
Product Research
What's in the box?

Download owner's manual

  • Mono amplifier with 40-amp ATO fuse inserted
  • 9.5" Speaker-level input harness (with stereo RCA plugs on one end and bare wire on the other end)
  • 4 Self-tapping screws (length=3/4")
  • Owner's Manual (En/Sp/Fr)
  • Warranty sheet (En/Fr)

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Controls
Connections
Specifications

Features

CEA-2006 Compliant: CEA-2006 is a system of testing & measurement methods for mobile audio amplifiers; both stand-alone amps and those built into head units. This voluntary standard advocates a uniform method for determining an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured into a 4Ω load, with 1% or less Total Harmonic Distortion plus noise (THD+N), at the stated frequency range for the amplifier (20 Hz to 240 Hz in this case). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4Ω. CEA-2006 allows consumers to compare car amplifiers and receivers on an equal basis. The Pioneer GM-7400M under CEA-2006 regulations is rated at 200 watts RMS x 1 channel with a 72 dBA signal-to-noise ratio. Also following CEA-2006 guidelines, the 2Ω power rating is 400 watts RMS @50 Hz.

Class D Amplifier: The GM-D7500M is a Class D Digital amplifier, which provides higher output power in a smaller package than a traditional analog amplifier. This Class D amp has a very efficient power supply, turning a lower percentage of the power into heat and more into the actual load. The amp's PWM (pulse-width modulator) modulates the original audio input signal with a triangulated signal wave which has a much higher fixed frequency. The resulting digital signal contains both the input signal and a band of frequency components around the modulation frequency. The Low Pass Filter (LPF) filters out the high frequency pulses, leaving the amplified output signal to be sent to the speakers.

2-Ohm Stable: The Pioneer mono amplifier is capable of handling load impedances down to 2Ω. The amplifier is rated at 400 watts RMS x 1 channel into 2Ω with <1% THD+N.

Controls

Low-Pass Filter (LPF): The amplifier's internal low-pass filter is continuously variable from 40 to 240Hz with a slope of 12dB/octave. The filter can be turned on or off using a two-way switch.

Bass Boost: For added low frequency performance, this amplifier has a bass boost circuit centered at 50 Hz. The amount of boost is selectable at 0 dB, +6 dB, and +12 dB using a three-way switch.

Connections

Power Connections: The power and ground connections are screw terminals that will accommodate up to 4-gauge wire. The remote turn-on set screw terminal will accept up to 8-gauge wire. A slotted or Phillips head screwdriver (not included) is required to tighten/loosen the terminals.

Speaker Level Input: A speaker level-to-RCA adapter is included, allowing you to splice your radio's speaker wires to the adapter, then plug it into the RCA inputs on the amp. The amplifier automatically detects the type of signal being input, therefore, there is no input switch to set. In many cases, the amplifier will automatically turn on when a speaker-level input signal is detected, and will turn on or off when the head unit is turned on or off. In cases where the amplifier does not turn on automatically, the system remote control wire should be connected to the amp to turn it on and off.

Input Sensitivity: The amp will accept RCA input signals between 200mV and 6.5V, and a speaker-level input signal between 0.8V and 10V.

Speaker Connections: The speaker output terminals are also screw terminals, and will accommodate up to 8-gauge wire. A slotted or Phillips head screwdriver is required to tighten/loosen the terminals.

Specifications

  • Power Output (at 14.4 volts):
    • 200 W x 1 RMS (4Ω, 20Hz-240Hz)
    • 400 W x 1 RMS (2Ω, 50Hz)
    • 400 W x 1 Maximum (4Ω)
    • 800 W x 1 Maximum (2Ω)
  • Current Consumption:
    • Continuous: 18A (4Ω)
    • Average Current Draw: 5.2A (4Ω), 10.3A (2Ω)
  • Best Frequency Response: 10Hz to 30kHz (+0dB, -3dB)
  • Signal-to-Noise Ratio:
    • 95 dB (IHF-A network)
    • 72 dBa (CEA-2006 spec, 1 W into 4Ω)
  • Distortion: 0.03% (10W, 100Hz)
 
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Pioneer GM-D7500M Reviews

Average Customer Review:

7 people say:

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Filter by rating:
5 out of 5

Great Amp

Written By vinny, new york city on Saturday, May 26, 2012
 
pulling 400 watts in 2 ohm load to a single 12 woofer mounted inside a 4th order bandpass box....this amp supplies pleanty of power very clean thumping bass.........as i come down new york city streets the bass makes car alarms go off....(just a matter of time before i get pulled over by police)
Pros:
great amp runs cool even under full load....small fits under drivers seat cant see it
Cons:
none so far............
1 out of 1 people found this helpful
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"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
Value
 
5 out of 5

flat out best class d on the market

Written By snowman, wichita.kansas on Monday, November 14, 2011
 
yep pioneer i was surprised to. far exceeded my expectations. better than my kickers and alpines. as good as my jl.
Pros:
every thing
Cons:
nothing
1 out of 1 people found this helpful
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5 out of 5

Powerful little amp, Better than the competition

Written By Matt G, Baton Rouge, LA on Monday, August 29, 2011
 
I found this amp used locally and bought it for my wife's Sienna minivan. I had 2 older Infinity Reference 12's in a box, but having a wiring problem with one that I had to keep soldering. I had these same 2 12s in a 95 Camaro (sitting on the back seat facing forward) on an Alpine M500 (same price as this amp, but rated at 500W RMS @ 2ohm). I was expecting a little less out of this amp than the Alpine because of the specs, but I was wrong! It pushes more power than the Alpine when I did a side by side comparison, only difference being the vehicle. If you're looking for a mono sub amp in this price range, I promise you, take this one over the Alpine. Not dissing the Alpine because I love it too, but this one is the same price, same physical size, and puts out more power. I've been running it on 1 4ohm 12" (I gave up on soldering the other one) and the sound is something I would expect from a $500 amp and $300 high end sub. With the 2 12's hooked up it was too much for me and I used to rock 4 Punch 12's in my younger days.
2 out of 2 people found this helpful
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5 out of 5

Great little amp!!

Written By Eugene O, Edison,NJ on Thursday, August 04, 2011
 
l bought this amp knowing Pioneer has been in the audio business for so long. l'm not disapointed, it pushes my 10" Kicker in a sealed enclosure very hard! l'm very impressed with the power output and the amp is so small. l have it hidden under the front passenger seat and it doesn't get very hot too.
4 out of 4 people found this helpful
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5 out of 5

Awsome Amp!!!!!

Written By Ray, South Jersey on Friday, June 17, 2011
 
I had this amp hooked up to two 12 sony xplods and it quaked. People didnt believe that those were sonys. I just recently blew those subs. Now I think Im getting some kickers.
2 out of 2 people found this helpful
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5 out of 5

Pioneer GM-D7500M

Written By 2fast, Socal on Thursday, August 26, 2010
Crutchfield Customer Review (What's this?)
 
This is a pretty cool amp. I bought it with a 12'' sub! I though that was a great deal, having a limited budget. It worked out perfectly. It looks quite nice next to my old school pioneer premier 4 channel. The only problem I had was the sound wasn't coming out of the sub (by my own user error) So I called up tech support, they were fast and got to the point and within 10 minutes I was on my way to bass!!! Thanks Crutchfield!! :)
3 out of 3 people found this helpful
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5 out of 5

Great little amp

Written By Eric, Fayetteville NC on Friday, April 02, 2010
Crutchfield Customer Review (What's this?)
 
Hooked this amp up to a 12" Pioneer shallow sub in a Pioneer shallow box. Wow
this little guy can push some good power. Bass is crisp and clean, and will go
pretty loud. Installation is a breeze, and setting it up and fine tuning is a
snap. Looks nice, Great product.
7 out of 8 people found this helpful
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