Good upgrade amp for my Thiel 3.6s

Justin,
My Thiel CS 3.6's have been driven by the KSA-150 which was not bad at all! Then I bought a KSA-250 and it got even better. After talking to the guys at Krell they recommended finding a second KSA-250 and sending them up for conversion to the MDA-500 mono blocks. I'm done! I could not want any better sound from the 3.6's being driven by the MDA-500's. These are incredibly hard to find but you can get the same performance from the MDA-300's for the price you are looking at. The MDA-300's are KSA-150's converted over to Mono Differential Amps. If you already have the 150 then a second 150 would cost you less than 2000.00 *There is also a pair of MDA-300's for sale here from a gentleman in NY which would mean instant gratification without waiting for your amps to come back from Krell. My cables of choice for this system are the MIT balanced inter-connects and MH-750+ series II speaker cables.

The 3.6's can handle large amounts of power and the more clean power you have the less likely you are to damage them. The KSA-250 will sound better than the KSA-150 does. Not by a lot but it does!

I had my amps done just about 2 years ago. As far as being misled, I'm not sure? Like I mentioned mine were done a little while ago (6/00). They may have run out of the parts needed to convert like the new face plates and rear panels. Sorry about that, I didn't know they had stopped. You did see the MDA-300's here for sale by "Fsdizon".

Classe amps seem to be popular with the Thiels but my experience with a CA-200 was not as good as the Krell KSA-150. The CA-200 performed quite well but gave up a little too much resolution around the instruments and also lacked the spatial, pinpointed soundstage that the Krell offered. The Krells seemed to remove the boundries of the walls and opened up several more feet to the outside of the speakers.

If you really like the resolution of the KSA-150 then I'd suggest trying their older mono blocks but make sure you are willing to run dedicated 20 amp service outlets for these amps or they will not rise to their full potential. They are powerful amps but need "homeruns" to the breaker box to supply pure power and not degrade the supply to the front end components. This alone made a huge difference in my KSA-150's performance and would not have even thought about trying the MDA-500's to regular circuit outlets. This would stand true for any mono block setup of real substance!!

Bruce