I had thought my 08 knight was setup the same as most other monaco coaches...
That is, a magnadyne radio, and a full coach surround sound system. and a switch in the overhead that either pumped the magnadyne, OR the surround sound system through the surround sound speakers?
It also had a pair of speakers in the bedroom that always played the radio.
If the kids were watching TV, the only place we could hear the magnadyne was in the bedroom!
The very first mod I did to this coach was install a pair of speakers in the overhead cabinets, pointing straight down the windshield. we connected them to the magnadyne "bedroom speaker" outputs.
Works good. my kids can keep watching movies as we travel down the road, and I can hear my satellite radio.
and i can still hit the switch and pump the magnadyne through the main coach speakers if i want too.