Short version (including my mistake):
I put an 8100 in my 07 Ranger last fall and it's been working perfectly. Last week I picked up an Infinity Basslink for a hundred bucks and installed that. Now here's my bad... I plugged the Front/Rear Left/Right RCAs on the sub's amp into the same ones on the 8100. Not the sub-out RCAs. Turned it back on and the audio was coming through the sub. Being a sub, you can guess how that sounded and I went "ohhhhhhh" and just plugged the front L/R RCAs from the sub into the the sub-out on the 8100 and now only the sub has audio.
To me, it's as though the 8100
