Same experience here with Krell customer service, outstanding. I also own a Krell TAS, nice to know i can send an individual channel back for repair if it fails and not the whole amp. I have been told by Krell customer service the TAS is very reliable. Please comment if this is your experience. My TAS is also 15 years old and still works perfectly, this amp is a keeper for me. Mind you, I said the same thing about my fully refurbished KSA-250, then I sold it! Most stupid thing (HT, HiFi related that is) I have ever done. What an amazing amp the KSA-250 is, I can still remember how it sounded and performed, legendary.