everything

Clock is hard to see in the sunlight and it is really small

The difference between that and the 650 is 5.5 volt preamp outputs. It also is an ES. Better componants all around I love this cd player. I use the cd changer. I used it with two amps and no speakers connected to the onboard amplifier. Never have had a problem with it. I have used it in three different vehicles.

Very simple to upgrade with a cd changer or minidisk player. Just plug and play stuff..

Pain to get an amplifier to work with it.

Pretty good headunit. The only problem I had was it needed a lot or work to be able to install an amplifier, as the rca cables get disabled when you use the speaker wires from the back. Otherwise, a decent product. No problems with it so far.

Easy to Use. Colorful. Good overall Product..

Distored at high volume. Better surge protectors..burned it up on a 150 amp amplifier.

Good Product..dont really know what the difference is btwn this and the 650 except the price difference.