A Question about a car set-up

[okandroid]

I have an Alpine CDA-7892 Head Unit and a belkin auto charger/line out. Right now if I go above a certain volume it sounds very tinny and very distorted. I dont think I have the volume on the charget set right. What volume should that be at. Also can someone reccomend where the bass/treble and what frequencies they should be at for the head unit. Also I would like to know if MX should be on or off. Only people with alpine head units should know the last two questions but much help would be appreciated.

-Thanks.

[rwbutler]

I've adjusted my belkin lineout output so the sound level is the same on all audio sources.

[okandroid]

you mean like the cd player sound and the ipod sound would be at the same volume.

[rwbutler]

exactly

[okandroid]

Alright I think I have it set right. It could be that my stereo just sucks. Im a totally lost in the car audio world. The car I bought already had a pretty nice stereo in it. Here's the set up. Alpine CDA-7892, 2 4" polk ex II speakers on the front and 2 6x9" Pioneer Premium 220 watt max speakers in the back. I thought that was a good set up because I thought I had an amp but it was an old amp that had been left from an old system. it's not even connected. I'd like to buy a new amp, but first Id like to know if its necessary and what is a good amp for a fair amount of money. I like alpines stuff but it tends to be expensive. Please help me. Thanks.