I have the Rio along with Sony MP3 receiver in dash
MTX 4244 4 channel amp- for door speakers
Alpine 2 channel amp-bridged to sub
Infininity components in the door
8" JL Audio sub in the passenger wheel well

Have the Sony leading into the AUX in on the Rio

Just read my post noted above regarding proper grounding of the sled

..lots of road noise but fun with the top down!

actually thinking of installing a pre-amp to give me a bit more headroom for the system