I agree with the Gentleman above.Called 3 times talked to a female in tech services that new absolutely nothing regarding info on upgrades for the B&k 30.Considered moving up to the Ref 50,But decided not to because of the bad costumer service.I auditioned the AVM20 and it's a fantastic unit.But ended up buying the BRYSTON SP 1.7 The most musical and dynamic of all the pre/pro's that i considered.
