Thanks for all the input. I've got plenty of experiments to keep me busy for now. I hope to use vehicle power rather than batteries, because the HD upgrade sucks a bit more juice than before. I think I'll avoid trying to run a line directly to the battery for now, but if filters fail it may be inevitable. I'll let you know. If I hack the plug off the DC adapter, I'm assuming I'll need to add an inline fuse to protect my player. If so, what gauge wire could I use without risking meltdown?
If anyone else has any ideas, let me know.
Thanks!
Brad