Axiom Home Page Forums General Discussion Technical Questions Anoying humm in my LFR1100

I refused to believe that Axiom would send out new
speakers or components with a defect. So for the past 2 months I have been listening to my LFR1100 with a definate humm coming from the mid and woofers.

I have tried replacing my RCA interconnect cables just to make sure it was not them.

I have tried a different amp and pre-amp setup

If I unhook the LFR DSP from the amp, the speakers are dead quiet. If I hook just the front speakers up, and go directly from the pre to the amp and bypass the DSP all together, they are dead silent.

it sounds like a ground feedback loop humm.

is there any thing else to try before rattling the doors at Axiom to get a new DSP sent out to me as the one they sent seems to be DOA?