Genz rocks. Andy (Agedhorse) already contacted me and we did a test. The amp works with the bass plugged into the effects return, which means it is just a tube that probably got damaged in shipping.
Called Genz and talked to Jeff... and even though I'm sure just replacing a tube would have taken care of it, they are shipping a new amp to me for Saturday delivery, just so they can check out the unit.
Really top notch (as many know already).
Great amp, and my guess is, other than the typical tube going to hell in shipping, these will be solid as a rock.
Funny how you can be more pleased with a company that fixes a minor problem quickly than if nothing had even gone wrong.
Look for couple J Bass clips later this weekend.