I have a REf. 64, MD 10, KRC HR, AVS and KAS-2s. I run Thiel 7.2s and BMW 801 IIIs. I liked the KAS2s so much that I just purchase a set of KAS. I have had no problems with Krell on their service and support of my older equipment. I have not compaired a KAS to the 650M. If you are looking for a KAS, expect to pay 11,000 to 12,000 for them. A set was just on ebay, but the owner did not let them go at 10,000.
Krell 65M's VS Krell audio Standards
Need some advice. Looking to upgrade a pair of MDA500's. Most of my system is Krell. Ref 64 with MD10 for digital, Accuphase tuner and Krell Audio Video Standard for preamp processor. I enjoy listening to jazz, especially vocals ie. Diana Krall, Patricia Barber etc. On occassion I do like to crank it up. Sonically, does anyone out there have any suggestions between these two pairs of Amps? Am I in danger of buying a 10 year old pair of KAS's and having servicability problems?