Average Reviews:
(More customer reviews)Like the other guys said - it is big, it is heavy. Big and heavy suggests big heatsink, which you want. I haven't opened it up to see how well built it is inside, but the bottom cover is made of that cheap, thin, plated steel that they make generic PC cases out of. In contrast, my 350W Rockford Fosgate sub amp is all cast aluminum and chrome-plated, thick steel. The Pioneer runs a bit hotter than the Rockford amp and the screw terminals are much cheaper than the enclosed terminals of the Rockford, but you gets what you pay for.
I have this amp mounted vertically on stand-offs on the side of my trunk space, with a 120mm PC fan blowing across it. Only gets warm then, even when you start off with the trunk interior at 100°F.
I'm playing a 4-year old Pioneer head unit via the RCA jacks into this amp which drives a pair of [...] 6x8 Pioneer 3-way front speakers and some [...] 6x8 Infinity 2-way speakers in the rear. Sounds nice and clear - no noticeable distortion at a fairly high volume level (that I can't stand to listen to for more than a few minutes at a time). With only the head unit (rated at 4x50W, which is supposedly 4x25W RMS) powering the same speakers, I had to use its built-in HPF to take away the bass below 50Hz, else it would be distortion-a-plenty. Now with this amp hooked up, I can feel the front doors vibrating again and no distortion!
Do yourself a favor - ignore the fairy-tale power rating on your head unit and use a separate 4-channel amp for your main speakers. It just sounds so much clearer and you can enjoy the full amount of bass that your speakers can produce. You don't have to listen at a very loud volume to hear the difference. This is the first time I've bothered getting an amp for the main speakers in a car (and I've been driving since 1988). I've upgraded head units and added small subs, but this has made the most overall difference in sound quality. Next time I change cars, a 4-channel amp is the first thing I'm going to install. Wish I'd figured this out years ago!
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Pioneer GM-6400F 600-Watt, 4-Channel Power AmplifierThe 4-channel GM-6400F delivers a whopping 600 watts max (60 watts x 4 or 150 watts x 2 at 4 ohms; 75 watts x 4 at 2 ohms)--plenty of juice to power your high-quality speakers. It's also got built-in 4-channel crossovers. Speaker level inputs for easy connection to an OEM headunit. Oversized power terminals. And a wide input level of 400mV to 6.5V.
GM-6400F Specs
Pioneer Car Audio SystemsPioneer's Mobile Business Group is known for offering the kind of in-car products that make driving more enjoyable by offering high quality audio and video, seamless connectivity and ease-of-use. Its focus is on the development of new digital technologies including audio video, navigation and satellite radio, while maintaining its strong heritage in products for car audio enthusiasts and sound competitors.
What's in the Box Pioneer GM-6400F Amplifier, Input Harness, Installation Hardware, Owner's Manual
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