I’ve owned the Adcom 555 since it was first made,bought it used. After reading a favorable review of a Musical Concepts Modified 555 in Absolute Sound I sent it too them and I had it modified. Very impressed with the results,gone was the grain in the treble and the bass had more slam and tighter. They made it dual mono too. I still have it in storage and I hard wired a Card as power chord into it.
I just got my Adcom 750 pre amp,a Nelson Pass design,back from Musical Concepts last month after having it modified to the Elite level and it sounds Uber. Sounds tube like with detail and warmth,very holographic with separation of instruments. I had owned the 750 since buying it from the first run with the Blue circuit board and Stereophile rated the 750 Class A.
Adcom was my first foray into affordable high end and holds a warm place in my heart.
I just got my Adcom 750 pre amp,a Nelson Pass design,back from Musical Concepts last month after having it modified to the Elite level and it sounds Uber. Sounds tube like with detail and warmth,very holographic with separation of instruments. I had owned the 750 since buying it from the first run with the Blue circuit board and Stereophile rated the 750 Class A.
Adcom was my first foray into affordable high end and holds a warm place in my heart.