FWIW, I had a Krell CD-DSP that I really liked. I stored it for a few years and it refused to play from the analog outlets after I retrieved it. Although it did work via the digital output, I decided to have it repaired by Krell. I called them and they told me that there wasn't anyone at Krell who had experience with that player so they couldn't help me. I give them credit for their honesty, but that didn't get my CD-DSP repaired.
Krell technical support
Not really of this category but I wanted to share my incredible support experience from Krell regarding a software upgrade to a Foundation processor. No problem getting my call taken and immediate action taken to fix my issue. Overnighted the software fix at no charge. FYI I also have one of their Chorus amps. IMO a great sounding amp with whisper quiet fans and a proprietary system to allow full class A operation as needed as opposed to full time. Regardless I compared it to a Pass 250.8 and found them to have similar sound characteristics. These Krell amps sound great and can be had on AGON at favorable prices. Finally in person they look good. I have zero motive here except to pass on a great customer service experience and plug the amps a bit as I'm not sure they've been properly represented here.