Pioneer GM-D1004 400W Compact Class FD 4-Channel Amplifier
An amplifier shouldn't take up much space, especially in a car. That's why this compact yet powerful Class-D amplifier could be just right for you. The GM-D1004 is a compact amplifier that can be easily installed in the dashboard or center console - the cables are already included. Its Protection Control System prevents overload of the vehicle's electrical system, allowing the GM-D1004 to be easily connected to existing wiring. Additionally, the system prevents overheating and ensures stable operation. The amplifier features a large-capacity capacitor that provides stable voltage, resulting in clear, powerful sound even at higher volumes. It delivers no less than 4 x 100 watts in very compact dimensions. The GM-D1004 detects the input signal and automatically adjusts to the correct sensitivity, whether it's a RCA or speaker connection. Furthermore, the amplifier automatically turns on and off when connected to the speaker output of the radio. Reinforcements in the amplifier's base dampen the effects of vehicle vibrations. Thanks to this Total Vibration Control (TVC), you can enjoy high-resolution audio files in your vehicle.
An amplifier shouldn't take up much space, especially in a car. That's why this compact yet powerful Class-D amplifier could be just right for you. The GM-D1004 is a compact amplifier that can be easily installed in the dashboard or center console - the cables are already included. Its Protection Control System prevents overload of the vehicle's electrical system, allowing the GM-D1004 to be easily connected to existing wiring. Additionally, the system prevents overheating and ensures stable operation. The amplifier features a large-capacity capacitor that provides stable voltage, resulting in clear, powerful sound even at higher volumes. It delivers no less than 4 x 100 watts in very compact dimensions. The GM-D1004 detects the input signal and automatically adjusts to the correct sensitivity, whether it's a RCA or speaker connection. Furthermore, the amplifier automatically turns on and off when connected to the speaker output of the radio. Reinforcements in the amplifier's base dampen the effects of vehicle vibrations. Thanks to this Total Vibration Control (TVC), you can enjoy high-resolution audio files in your vehicle.
An amplifier shouldn't take up much space, especially in a car. That's why this compact yet powerful Class-D amplifier could be just right for you. The GM-D1004 is a compact amplifier that can be easily installed in the dashboard or center console - the cables are already included. Its Protection Control System prevents overload of the vehicle's electrical system, allowing the GM-D1004 to be easily connected to existing wiring. Additionally, the system prevents overheating and ensures stable operation. The amplifier features a large-capacity capacitor that provides stable voltage, resulting in clear, powerful sound even at higher volumes. It delivers no less than 4 x 100 watts in very compact dimensions. The GM-D1004 detects the input signal and automatically adjusts to the correct sensitivity, whether it's a RCA or speaker connection. Furthermore, the amplifier automatically turns on and off when connected to the speaker output of the radio. Reinforcements in the amplifier's base dampen the effects of vehicle vibrations. Thanks to this Total Vibration Control (TVC), you can enjoy high-resolution audio files in your vehicle.
An amplifier shouldn't take up much space, especially in a car. That's why this compact yet powerful Class-D amplifier could be just right for you. The GM-D1004 is a compact amplifier that can be easily installed in the dashboard or center console - the cables are already included. Its Protection Control System prevents overload of the vehicle's electrical system, allowing the GM-D1004 to be easily connected to existing wiring. Additionally, the system prevents overheating and ensures stable operation. The amplifier features a large-capacity capacitor that provides stable voltage, resulting in clear, powerful sound even at higher volumes. It delivers no less than 4 x 100 watts in very compact dimensions. The GM-D1004 detects the input signal and automatically adjusts to the correct sensitivity, whether it's a RCA or speaker connection. Furthermore, the amplifier automatically turns on and off when connected to the speaker output of the radio. Reinforcements in the amplifier's base dampen the effects of vehicle vibrations. Thanks to this Total Vibration Control (TVC), you can enjoy high-resolution audio files in your vehicle.
in 3 offers
The lowest price for Pioneer GM-D1004 400W Compact Class FD 4-Channel Amplifier right now is $220.00 at Everything 4WD, compared across 3 retailers.
The all-time low was $144.77 on 27 Nov 2025 — today's price is 52% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 16 June 2026.
Last updated at 16/06/2026 10:22:39
Pioneer GM-D1004 Compact Class FD 4-Channel Amplifier
Delivery $13.95
Pioneer GM-D1004 Easy to install, 4-channel car amp with TVC concept and input sensor (400W)
Delivery between 19–26 June $62.89
Pioneer Gm D1004 Car Amplifier
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
originally posted on onlinecarstereo.com/
Pioneer amps are really the best! I've been buying Pioneer products for a long time, and just got this one recently installed in my car. What a difference it makes compared to my car's factory amp. It was also very easy to install.
originally posted on walmart.com
It has been over 1 year since co-installing this power amplifier on the output end of my DUAL CD-Radio. I bought this power amp because in my experience, - except for very expensive units - most replacement car radio/CD/USB units have relatively little power. I don't mean a lack of boom-box power; I mean sufficient power so that one can hear decent bass and treble response at reasonable volumes.The sound quality on this unit is absolutely outstanding! would give it 6 stars if it were offered. Sound is crisp, full and rich; this power amps' absence of its own volume control in no way detracts from its performance or value. After all, if you can control volume from your dash radio/CD/USB/BT unit, why do you need another one on the (usually inaccessible) power ... MoreIt has been over 1 year since co-installing this power amplifier on the output end of my DUAL CD-Radio. I bought this power amp because in my experience, - except for very expensive units - most replacement car radio/CD/USB units have relatively little power. I don't mean a lack of boom-box power; I mean sufficient power so that one can hear decent bass and treble response at reasonable volumes.The sound quality on this unit is absolutely outstanding! would give it 6 stars if it were offered. Sound is crisp, full and rich; this power amps' absence of its own volume control in no way detracts from its performance or value. After all, if you can control volume from your dash radio/CD/USB/BT unit, why do you need another one on the (usually inaccessible) power amp?This unit is a Class D amplifier. What that means is that its power-to-size ratio is VERY high. Translated, this is a 400W amplifier in a VERY small pkg. I mounted mine via velcro on its underside to the bottom of my glove compartment, so that if its own fuse ever blew, I could pull the unit out of the glove easily, replace the fuse, then the amp, and boogey away. (BTW, the original fuse hasnt blown yet).Will be shortly purchasing another one of these marvelous power amps for my other car, before the mfr gets ny hir-brained ideas about discontinuing this model.
originally posted on ebay.com
Installed into my Mercedes CLS which has been fitted with a Parrot 9200i. The Parrot is good but has a limited output and struggled to drive my aftermarket Focal speakers. I wanted an amplifiers that accepted high level inputs, was reasonably powerful, but compact enough to hide away in the rear wheel arch. Installation was easy with no requirement for either a big power cable or remote signal to turn the Amp on and off. Set up was even easier as the Amp has automatic gain, power it up and it sorts everything out its self. Very good sound quality through a pair of Focal components in the front and Focal co-axial in the rear. Massive improvement over the stock Merc Amp and the limited Amp supplied with the Parrot. Highly recommended.
| RCA Inputs | 4-CH |
| Amplifier Class | CLASS-FD |
| Warranty | 1 Year |
| Speaker Level Input | Yes |
| Terminal Type | Removable |
Pioneer GM-D1004 Compact Class FD 4-Channel Amplifier
Delivery $13.95
Pioneer GM-D1004 Easy to install, 4-channel car amp with TVC concept and input sensor (400W)
Delivery between 19–26 June $62.89
Pioneer Gm D1004 Car Amplifier
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Pioneer amps are really the best! I've been buying Pioneer products for a long time, and just got this one recently installed in my car. What a difference it makes compared to my car's factory amp. It was also very easy to install.
It has been over 1 year since co-installing this power amplifier on the output end of my DUAL CD-Radio. I bought this power amp because in my experience, - except for very expensive units - most replacement car radio/CD/USB units have relatively little power. I don't mean a lack of boom-box power; I mean sufficient power so that one can hear decent bass and treble response at reasonable volumes.The sound quality on this unit is absolutely outstanding! would give it 6 stars if it were offered. Sound is crisp, full and rich; this power amps' absence of its own volume control in no way detracts from its performance or value. After all, if you can control volume from your dash radio/CD/USB/BT unit, why do you need another one on the (usually inaccessible) power ... MoreIt has been over 1 year since co-installing this power amplifier on the output end of my DUAL CD-Radio. I bought this power amp because in my experience, - except for very expensive units - most replacement car radio/CD/USB units have relatively little power. I don't mean a lack of boom-box power; I mean sufficient power so that one can hear decent bass and treble response at reasonable volumes.The sound quality on this unit is absolutely outstanding! would give it 6 stars if it were offered. Sound is crisp, full and rich; this power amps' absence of its own volume control in no way detracts from its performance or value. After all, if you can control volume from your dash radio/CD/USB/BT unit, why do you need another one on the (usually inaccessible) power amp?This unit is a Class D amplifier. What that means is that its power-to-size ratio is VERY high. Translated, this is a 400W amplifier in a VERY small pkg. I mounted mine via velcro on its underside to the bottom of my glove compartment, so that if its own fuse ever blew, I could pull the unit out of the glove easily, replace the fuse, then the amp, and boogey away. (BTW, the original fuse hasnt blown yet).Will be shortly purchasing another one of these marvelous power amps for my other car, before the mfr gets ny hir-brained ideas about discontinuing this model.
Installed into my Mercedes CLS which has been fitted with a Parrot 9200i. The Parrot is good but has a limited output and struggled to drive my aftermarket Focal speakers. I wanted an amplifiers that accepted high level inputs, was reasonably powerful, but compact enough to hide away in the rear wheel arch. Installation was easy with no requirement for either a big power cable or remote signal to turn the Amp on and off. Set up was even easier as the Amp has automatic gain, power it up and it sorts everything out its self. Very good sound quality through a pair of Focal components in the front and Focal co-axial in the rear. Massive improvement over the stock Merc Amp and the limited Amp supplied with the Parrot. Highly recommended.
Installed this unit in a 2014 4-Runner hooking it up to speaker out inputs of the stock Entune stereo. Mounted the amp behind the glove box next to the stereo & tywrapped in place tightly. Sound quality is good, basically Entune sound boosted up a bit in wattage from stock. Bass has increased giving my new installed JBL's more power to kick. It is about 25% louder then stock, not a huge difference in wattage. Connected power leads directly to stereo 12V and butt spliced to all speaker in/out leads. Not difficult to install, about 1hr. JBL's are about 2-3 ohms and this can handle 2-4 ohms and is one of the reasons, besides small frame size, why I purchased this unit.
Big sound in a little package. I hooked this up to some JL audio C2 690 6x9's (highly recommend) in my front doors and JLAudio components in the rear doors. I then used dynamat extreme (highly recommend also) now my Jeep WJ sounds amazing. Really don't even need a subwoofer these JL's have lots of clean bass. Can't believe it for the size of the speakers they put out a lot of bass. Highs are crisp and clear also. This little amp works really well so far. I'll be hooking up my JL audio sub tomorrow like I said probably don't need it but hey I love lots of nice tight accurate bass.
I bought this compact amp to boost the 6.5in 300W component door speakers I recently installed in Captiva 2016. Superb quality. Easy to install near the head unit. Compact, can be located under the dashboard. Unlike conventional amps, this does not require running heavy power cables, nor speaker wires, just tap to OEM speaker wires. Great product, highly recommended.
This tiny amp is too underpowered to run higher quality 75 watt+ rms speakers. Im sure it would perform better with lower wattage coaxial speakers that arent meant to produce good punchy midbass. Dont get me wrong this lil amp sounds good and definitely better than what my double din kenwood excellon stereo can dish out. But not enough for my power hungry Pioneer TS-D6902R 6x9 speakers. I guess i shuda known better. I got carried away by reading the reviews. I will have to either amp up, or downgrade on my mids. Otherwise its a cool lil amp. I personally cant crank it up too high for too long or it will get into what seems like protection mode and lower my volume substantially no matter how much i turn it up. I have to power off & on to make it work well. And thats ... MoreThis tiny amp is too underpowered to run higher quality 75 watt+ rms speakers. Im sure it would perform better with lower wattage coaxial speakers that arent meant to produce good punchy midbass. Dont get me wrong this lil amp sounds good and definitely better than what my double din kenwood excellon stereo can dish out. But not enough for my power hungry Pioneer TS-D6902R 6x9 speakers. I guess i shuda known better. I got carried away by reading the reviews. I will have to either amp up, or downgrade on my mids. Otherwise its a cool lil amp. I personally cant crank it up too high for too long or it will get into what seems like protection mode and lower my volume substantially no matter how much i turn it up. I have to power off & on to make it work well. And thats while lowering the bass enough to where the speakers dont clip. Because they will clip if you try to get any decent midbass on high end components. Even when bridged to 2 channel and doubling up the power to speaker. Bottom line, it should work great on small wattage speakers. It uses only a 15amp fuse, so what can you expect really?
Brilliant piece of kit. I'm using in combination with my head unit to power 4 of my car's 8 channel system which works well being of similar power output.No gain or fancy crossover dials. just very simple HPF/LPF switches which is all that's needed.great price and service from caraudiocentre. thank you very much
After some hunting around for a amp to supply healthy power levels and a compact enough size for the underside of the rear seat in a MINI it became apparent that the the little pioneer was the best choice out there. It is incredibly easy to wire and powers up instantly, the feed i opted for (to avoid unsightly headunits) was to equipe the MINI with a amp plus two rear speakers and a AUX input. After a little over 2 hours from start to finish the install was complete and sounded amazing. Highly recommended to anyone who needs a compact amp with enought power to drive most speakers.
First off this little amp puts out some serious power!! ..BUT I found it lacked any bass and it wasnt real clean power, the lack of a gain control hurts the amp IMO as the amp is basically set at full gain on a amp with gain control which leads to distorted sound at high volume (I knew it didnt have a gain control b4 I got it) Had it hooked up to Pioneer 6.5 components and 6x9s and it was decent (but not great) for the door speakers but the 6x9s lost a lot of bass compared to my Pioneer 2 channel amp 75 watts rms) I wanted to replace..it wasnt very clean sounding but for the price I gave it a shot.. If you have a aftermarket deck with a preamp voltage of 4 or higher I think it would sound cleaner but my deck has 2.5 volts and that may have contributed to the sound a ... MoreFirst off this little amp puts out some serious power!! ..BUT I found it lacked any bass and it wasnt real clean power, the lack of a gain control hurts the amp IMO as the amp is basically set at full gain on a amp with gain control which leads to distorted sound at high volume (I knew it didnt have a gain control b4 I got it) Had it hooked up to Pioneer 6.5 components and 6x9s and it was decent (but not great) for the door speakers but the 6x9s lost a lot of bass compared to my Pioneer 2 channel amp 75 watts rms) I wanted to replace..it wasnt very clean sounding but for the price I gave it a shot.. If you have a aftermarket deck with a preamp voltage of 4 or higher I think it would sound cleaner but my deck has 2.5 volts and that may have contributed to the sound a little. But my 10 year old Pioneer 75x2 amp sounded a lot better (at same volume)..I have that amp powering all 4 speakers now and it sounds great but I need a 4 channel amp for fader and crossover control. Thank Goodness for Walmarts great return policy!
| RCA Inputs | 4-CH |
| Amplifier Class | CLASS-FD |
| Warranty | 1 Year |
| Speaker Level Input | Yes |
| Terminal Type | Removable |
