Car Stereo MP3 Players
The Car mp3 players or the head unit as they are popularly called is the most critical element in your car audio assembly. The simple theory is that this is where the sound originates. The massive power the speakers or the amplifiers pack is going to be wasted if your head unit isn?t powerful enough to drive them. On the contrary factory fitted car audio assemblies usually come with power packed head units. The glitch is the decrepit amplifiers and speakers they provide which are incapable of squeezing the true potential out of the head unit.
There are a few things to consider before buying a Car Mp3 player. The primary question is how much of stereo system are you planning to build around the head unit. If you are really serious about your music, go for a head unit that includes pre-amp outputs. This deliver the cleanest out put and allows you to run an amplifier directly without the need for conversion. The clarity is a critical attribute to be considered while buying a car mp3 player. Clarity is basically the head unit?s ability to reject noise, and is characterized by a high pre-amp output and low output impedance.
Blaupunkt
Memphis MP66
The Memphis MP66 is a real head turner with a rich full color display and massive three line layout which offers ample space for track and system information. The unit can be connected to portable music players and thumb drives via the USB port. A six band equalizer which is built into the unit allows you to customize the sound to fit into the music and acoustics. Memphis MS66 is an upgrade friendly head unit featuring two sets of preamp outputs and a sub woofer output to connect to the amplifiers.
Alpine
Alpine CDE 9873
The Alpine CD# 9873 is a sleek mp3 head unit that offers full speed connection for iPods. The CDE-9873 has a cool blue illuminated buttons and red presets. The unit features a user friendly rotary encoder that allows for seamless interaction. The CDE-9873 has offers immense flexibility in system building with a selectable pre-out which allows you to choose between a full range or dedicated sub woofer. The head unit plays WMA and AAC playback along with the standard CD and MP# play back.
Pioneer
Pioneer DEH P5900IB
The DEH P5900IB has a brilliant pure blue OEL display which renders it with a dynamic appearance. The rotary commander provides superb control and operation. The unit also features Pioneer?s ?iBus? direct iPod control and a 10 key remote control.

But its hard to get the aesthetics of the speaker system perfectly right in a constricted space as that of a car don't you think ?
alpine is pretty good product and i'm satisfied with it's performance.
alpine is pretty good product and i'm satisfied with it's performance.