In trying to upgrade my car stereo, I want to replace some remote gain control pots with digital potentiometers located next to the amplifiers, and get rid of a lot of signal path cable by using digital encoders to control those pots.

I won't get into the gory details of the system layout, other than to say it is quite complex and this idea will get rid of nearly 150 feet of RCA cable, and in the process hopefully will get rid of some alternator noise at the same time.

The problem is... we have been unable to find any digital potentiometers that can handle more than about 5 volts signal measured peak to peak. I need at least 12v, and 15 would be better.

Do such a digitally controlled potentiometers exist, and if so where can I buy them?

tanstaafl.