Despite Bob insisting that his wiring is fine, the first thing I would have done is remove the wires and banana plugs and do it all from the get-go. Then verify the speakers by using them one at a time. If one fails, switch it to the other channel to see if the problem remains with the speaker or the amp channel.

For all the posts in this thread, I don't see evidence that Bob has ruled out these basic possibilities.

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::