Sent a DT-10 transport in. The response was about 2 weeks but try to do better. That is a reasonable amount of time for me to wait. I was able to talk to the service dept. supervisor a few times. Very friendly and helpful. The transport came back working like new. Krell has among the best follow-through and cusomer service that I've dealt with in any business. Today most companies wont pick up the phone much less return calls. I dont believe that you will ever see this happen with Krell. A very good experience and I intend to be a Krell customer for many years.