Sounds like a plan, Tim! Best of luck.
-- Al
-- Al
Passive high pass filter - Marchand XM446XLR-A
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For owners of Music Reference RM-200 power amps, a bit of clarification: Al's input impedance figure for the amp is correct for only the original incarnation of the amp---30kHz balanced, 15k per leg. In the Mk.2 (current) version of the amp, RM-200 designer Roger Modjeski increased the figure to 60kHz, 30k per leg. That's better for use with some tube pre-amps, which often have somewhat higher output impedances than most solid state pre's. |
Thanks Eric (bdp24). I’m wondering, though, if the change you referred to from 15K/30K to 30K/60K might have been introduced sometime after the Mk.II was initially marketed. The Stereophile review I referred to indicates in numerous places that it is a review of the Mk.II version, and describes various changes and improvements that were made relative to the original version. The photo of the amp on the first page of the review also shows "RM-200 Mk.II" as being marked on its panel. As I mentioned, that review indicates a measured balanced input impedance of 29K (JA’s measurements of balanced input impedances always represent the sum of the two legs), and also indicates a spec of 15K ("one leg driven")/30K (balanced). Also, Roger’s website still indicates 15K/30K, although he has not updated the amp's description to say "Mk.II." Best regards, -- Al |