I have since September 2014, the first purchased at a famous Parisian (Suresnes) studio.
I tried about twenty and I just make up my mind for this family. I did not know this family and came across it by chance in reference after buying a Kenwood M-2 that I have to fix it.
Amplification using the sort I bought two M-70 and M-65. They can be found at a reasonable price especially for the power that it can deliver more than 200 watts per channel! In practice, I never reached the watt, so it works in class A.
He even greater clarity and detail than my Marantz 1152, 4400 or other Harman Kardon Citation 24 is very nice, matter of taste, with red seen meters. Especially when we superimpose 3 A special feature is that there is a double set of knobs for adjusting the level of two separate sets of speakers (not used simultaneously).
The building is neat and sturdy; probably the last in the public domain affordable.
One copy arrived with 4 lamps pétées, found on Ebay. He needed to clean the CI that caused a delay in the extinction of the HP protection. Nothing too serious for an electronics with patterns found HiFiengine but probably the reason for the sale of the second by an unscrupulous owner (yes it was not given in the ad).
I was talking in reference literature, two paragraphs are devoted to "Audio Power Amplifier Design Handbook" by Douglas Self (ASIN: B009W3W2V6). The cost of this architecture using many transistors probably precipitate abandonment of this great solution! It also uses the technology ZDR (different from a reaction against classical)
I do it again and just make the election (3 amps in one month and the Bay LBC) I will shortly pictures of animals