Yes, do it (wrong) - use "an adapter" and get the horrible two channel sound our cars are damned with.

OR.......

do it RIGHT and do what this guy did - turn the abortion into a four channel system:
https://www.crossfireforum.org/forum...-channels.html

No adapter will do this for you, you MUST add the four extra wires from the Kenwood to the amp. My system, with my JVC, is four channel and was totally worth the effort.