Pioneer GM-D1004 Easy to install, 4-channel car amp with TVC concept and input sensor (400W) , Black

Have this running a set of Audison APK130 component speakers fully active with signal from a Pioneer headunit. Sounds fantastic and plenty of power. Extremely simple to install. Literally plug and play if you're using a headunit with ISO connections. No need to run additional power to the battery if your stereo circuit has enough power. Unit is very small so easy to hide in or behind the dash. Comes with some mounting screws but I just used velcro to stick it to the carpet behind the glovebox. Only minor complaints would be no gain control and fixed wire lengths can limit placement and/or a pain to tuck away.

Been running this amp for a year now and it's been perfect. As to the other review that states there are no instructions on how to bridge this amp. There are instructions in the manual and it tells you which wires to connect, but they're not very clear and obvious. You also have to do this yourself and remove the pins from the connector and reconnect in a different order. This is very easy to do with a pin removal tool (or even a paperclip). I removed the four pins not needed anymore as I have no intention of running rear speakers and heat shrinked them, leaving only four pins connected in bridged mode for two front speakers. The only issue I encountered with install was that the outer casing picks up interference and causes noise through speakers if it touches any chassis part which is earthed. You need to make sure the amp is isolated from the body. A ground loop isolator will remove the noise but also reduces low frequencies. Mine is installed in my glove box. Takes up hardly any space as it's so small. It's isolated, well ventilated and easy to remove if any faults. Sound quality is superb for the price. I did test it with 4x45w to begin with and even 2x45w and the sound is good and a massive improvement over a stock head unit amp. Being able to bridge makes it a really versatile amp and able to drive aftermarket speakers correctly. The instructions should be clearer and a pre made off connector for bridged mode would make it easier for people to utilize this feature. Take your time and install it correctly and it's a really good amp for the price.

Installed this plug and play unit in my 2012 honda (you need an ISO t-harness specifically for your car - usually £10-20 if you want a plug and play install). Was a breeze and made a huge difference- 20-30mins. Prior to the installation I upgraded all four 6.5” (17cm) speakers on all four doors. I added JBL stage 2 components in front (45w rms - £60) and Cerving Vega red 2 ways in rear (65w rms - £100) There was no bass and the speakers weren’t loud. Not a surprise as the factory head unit puts out 10w rms per channel tops. So not enough for the speakers that I installed. But after adding this compact amp, which beautifully fit behind the head unit, the audio is so loud that is impossible to listen to it at max volume. I tried it, and there was no distortion. On youtube I’ve see this amp tested. And it truly provides over 45Wx4. The test showed over 50W rms per channel. The amp also doesn’t get warm. And most importantly, nobody would guess that my 2012 car with a factory head unit has an upgraded system until they hear it. I did not have to cut or splice any of the factory wires. There are no crackles, pops or unwanted noise from the amp. It is perfect. I have plenty of mid bass with the speakers I purchased and they will do. But if I wanted to, I could also add a subwoofer. But I am very happy with the outcome and will keep things as is. Hope this review helps.

Easy to install. Very light and compact. Fits in a mini neatly. Plenty of output.

Fulfilled my expectations. Tonally it seems no different than the factory head unit, which just indicates its high level of transparency (a good thing). It's capable of delivering significantly more power than the factory head unit and this has enabled me to fit some better sounding after market speakers that were not quite as efficient as the factory speakers and still turn it up when the mood takes. Its not capable of blasting huge SPL, but I doubt anyone considering this would be expecting that. The compact size meant I managed to find a perfect spot for it behind the glove box. The high pass switches should come in handy when I fit a small subwoofer as it should stop the door speakers having to work so hard hopefully further improving sound quality. The only slight niggle is that my car has stop / start and in traffic there can be a momentary interruption to the sound when the car starts back up, which was not an issue with the factory head unit on its own. Also if the volume is very high when the stop / start activates the sound can cut out entirely as the amplifier senses the voltage drop and puts itself in protection mode. Not a big deal for me as its quite rare for me to listen at very high volume, but something to bear in mind if you do enjoy your music very loud.

If you want to keep your standard head unit but improve audio quality and output this will help! I upgraded my Dacia duster speakers because the originals sounded so bad. The speakers were expensive. There was an improvement but I was still left unhappy. My head unit (medianav) was functional. Had Bluetooth, touch display and worked with steering wheel controls etc, however after looking online I found the speaker outputs were only 4x20w. Immediately after fitting this amp the difference was night and day. I am finally happy with my car's audio and it's now the best I've had in any car I've owned. This drives the speakers how they are supposed to be driven. I would absolutely recommend this to anyone looking for an audio upgrade. It was plug and play I just had to buy the correct connects2 T harness for my car. The T harness was under 20 quid

Great amp, at 4x45W rms it certainly kicks out a decent amount of power for its size and sound great through my Focal speakers BUT..... There were no wiring instructions for bridging this amp despite the 2x200W (2x90W rms) claims, and when Turnbulls Radio (who fitted it for me) rang Pioneer for details they were told bridging was not recommended because it runs very hot. Given that I bought this specifically to bridge it to 2 channel I was highly unimpressed with this and believe it verges on false advertising. Also, despite having a very shallow head unit (no cd mechanism, it just plays USB, Android etc) there wasn't room to fit this amp in behind, they had to drop my dashboard to fit it underneath instead which they said was a really fiddly job. Still, even at 45W rms per channel and only using 2 channels being used it still blasts out a decent amount of power.

Recommended to me by my local car electronics guy, simple cheap way to amplify my 4 Speaker Blaupunkt stereo in my 1989 Renault 5 without blowing the bloody doors off!

Büyük bir hayal kırıklığı. Araç multimedia sına bağlandı. Sanki yokmuş gibi hiçbir katkısı olmadı. Ne ses kalitesi ne de volume da bir iyileşme yok. Boşu boşuna ısınan mavi ışığı yanan bir kutu sadece.

És un amplificador muy compacto y fácil de instalar. Yo lo he utilizado sín rca y no he oído ningun ruído al conectarlo o apargarlo, mis altavozes son unos Coral de 45wRMS y ahora puedo subir más el volumen sín que se distorsione. Si quieres dar un aumento de potencia a tus altavozes y estos no son excesivamente potentes cumple su función. Lleva el suficiente cable como para poder colocarlo en el sitio donde se desee. A parte lleva un sistema para filtrar la frequencia de agudos o graves, que ea muy facil de utilizar. La unica pega que le veo es que los cables están sin encintar y deberian estarlo ya que si rozan durante cierto tiempo con alguna pieza del coche se pueden dañar.

Petit mais puissant ! Excellent petit ampli, compact et très performant. Le son est propre, sans souffle, et la différence est nette même sur un système d’origine. Facile à installer et ne chauffe presque pas. Idéal pour ceux qui veulent un vrai gain de qualité sans prendre de place. Très satisfait !

This is an impressive little amp! I paired it with 93db Hertz speakers (50w rms) and they sound fantastic! I can highly recommend!

Ich war sehr skeptisch bei dem Verstärker, weil der Verstärker einfach nur zwischen den Werkskabeln und dem Radio gesteckt wird. Aber was dann am Ende rauskam war echt überraschend. Machen wir uns nichts vor, Wunder wirkt der kleine auch nicht. Man hat danach nicht auf einmal einen Technoclub im Auto, aber die Lautstärke geht verzerrungsfrei viel höher wie vorher, und untenrum passiert auch etwas mehr vom Bass her. Ich habe da einen tollen vorher nachher Vergleich gemacht. Verbaut habe ich Rockford Fosgate Prime R165X3 vorne und hinten. Ohne Verstärker verzerrten die Speziell im Bassbereich enorm früh. Sogar so früh, dass man nichtmal bei den normalen Fahrgeräuschen auf der Autobahn (130 kmh) was von der Musik verstanden hat. Es war sehr mühsam so Musik zu hören. Jetzt mit dem Verstärker verzerrt es sehr viel später, und es gibt ein gutes Plus an Lautstärke. Endlich kann man auch auf der Autobahn was hören. Die Verarbeitung des Verstärkers ist extrem solide. Keine scharfen Kanten, wertiges Gefühl in der Hand. Die Schalter wirken etwas "günstig" erfüllen aber ihren Zweck. Die Installation ist als "Kinderleicht" zu bezeichnen sofern man einen ISO Anschluss im Auto hat. Der Verstärker wird einfach zwischen den ISO Stecker gesteckt und benötigt keine separate Stromleitung. Achten sollte man auf einen guten Massepunkt im Radioschacht, sonst kann es zu einem unschönen "Pfeifen" aus den Lautsprechern kommen. Beim Anschließen hat man die Wahl, entweder per Chinch oder per High Level (Lautsprecherkabel) anzuschließen. Ich habe ihn per High Level angeschlossen, und er funktioniert einfach perfekt. Meiner Meinung nach sollte so ein Verstärker in jedes Auto. Er holt mehr raus und das nicht auf übertriebene Art. Das Einzige was man braucht ist viel Platz im Radioschacht!