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Audio Research D-250 made in the late 80’s through the early 90’s...

It puts out 250w/c and coincidentally it uses (12) input tubes, (4) 6550 regulator tubes and (16) 6550 power tubes altogether it uses (32) tubes in PP configuration.

Excellent midrange with a tonality more to the neutral side than being euphonic and or tubey sounding. The bass can be constituted as lean however, that’s debatable, as it cannot substitute quantity for quality.

BTW, this power amp used to be J.Gordon Holt's reference while driving his Maggies Tympani and Infinity IRS Beta speakers in the 80's


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