Lorne: I would suggest the same as Bob and look into some inexpensive MIT T-2 interconnects. My experience with them is they they are pretty soft on the very top end, and fairly warm. They aren't fantastically resolving, but they're actually quite good for the $80 or so they cost retail. This might be just the trick for zipping down the highway (safely, of course) with the tunes cranked.
Ken
Ken