Thanks Dak -

The click is the driver making the noise. Weird... I have not had this happen before.

I actually swapped the subs around, thinking it could be a cable issue. The click went with the offending sub.

My Denon is the 4311 model with dual sub outputs and independent level adjustment.

Dammit... These are real wood models too. Getting that amp off without scratching the finish can be challenging.

I have more speakers to unbox.... Still no call back from Axiom.