I heard these amps back in the early 90's driving vandy's. They sounded great and have cool looking wood siding. However, I dont know the first thng about technical issues...
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I have had a pair since the early 90's. Used them with Vandersteen 2s and now with 3A Signatures. Still love them. Paired with an Audio Research SP-9 preamp.
One thing to know; they don't like a conventional grounded power cord. So, you have to float the ground, or you'll get a hum. A standard grey 3 to 2 prong adapter will work just fine. I just upgraded to Audioquest NRG-2s and they improved the detail & imaging to a nice degree.
These are getting up in age now and the Muse KZ caps should be replaced on the main board. They are rated at 85 c and the center heat sink generates a hot 63c with the other 2 around 42c when the outside sink is 40c
These are 20 years old now and worth preserving for their excellent sound.
Hifigeek1- contact me about these