Many thanks for your reply, I just took em up to the repair shop and told the guy to give em a good once over. I feel better knowing he gave them a good bill of health. He told me he could have em back by friday and thier still under warranty so no skin off my back, just a waste of my time. I've had an awful lot of trouble with these brand new super expensive high end adats. Theyve been in the shop twice in three months, AND they are my 2nd set, my 1st three were replaced by Alesis. They were from a "Bad Shipment." Anyhow, my faith in Alesis is destroyed and I don't believe I'll be buying much more from them. To top it off I think they have a bunch of stoned 16 year olds in tech support. His advice to me was "Yeah, they'll do that. You better take em to the repair shop." What great support. Anyhow, thanks for the advice and I'll come here for more when they break again. By the way, I was using BASF tape, the kind they ship with the units.