I'm trying to make up my mind between three decks. Reason it is between these three is because I work at a distributor and we only carry JVC & Pioneer as car audio decks (if you don't count Coby & Blaupunkt).
It is for my girlfriend's car which has a pair of Pioneer TS-A6981R (6x9) in the rear and TS-1671R (6.5") in the front. Plans are to add an amplified 8" 200W MTX basstube in the future.
I personaly have a Pioneer DEH-P6600 in my car and I love the sound output.
The three contenders.
JVC KDAR5500
-Cool look in general, supposidly has good options, however I have tested this unit and it isn't all that great. Plus the price tag is so high because of the touch screen. RMS is only 18W per channel. Options are less configurable then the Pioneers.
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Pioneer DEH-P80MP
-Has a MOSFET60 instead of a MOSFET50 amp, which means 28W RMS speakers instead of the 18W the JVC has or 22W the other pioneer has. Does not have the new Supertuner IIID+ (just normal IIID) and no AAC support. Is motorized like the JVC.
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Pioneer DEH-P7700MP
-Supports Itunes AAC, new radio, however is not motorized. It is cheaper then the DEH-P80MP.
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I am really leaning towards the DEH-P80MP... it has more useful features then the DEH-P7700MP, however the DEH-P7700MP remains a contender as that deck seems to sell out everytime we get 'em in. The KD-AR5000 is there because my girlfriend found it pretty but I heard the sound on it is so-so.