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In Reply to: Generally speaking, ST-140s don't like 4 ohm speakers. Just a heads up. posted by Opus 33 1/3 on October 7, 2020 at 15:31:32:
......VanAlstine's Mos-Fet 150 was a 75wpc amp, very tolerant of low impedance loads. When B&K squeezed 100wpc out of the circuit they gave up that low impedance current capability and, arguably, made it a much worse amp for playing music with real speakers.
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Follow Ups
- It's interesting, the circuit that it copied..... - viridian 10/7/2020:19:53 10/7/20 (5)
- The first gen ST-140 with a single pair of Hitachi MOSFETs per side was rated at 70 wpc. - Opus 33 1/3 04:46:52 10/8/20 (4)
- Very few of the 70W version reviewed in Stereophile out there. - viridian 14:51:17 10/8/20 (2)
- I'd love to find a first gen 140 that had been fully restored, caps replaced, etc. - Opus 33 1/3 03:58:27 10/9/20 (0)
- I've had a bumber of B&K amps. Probably my favorite was an EX-4420. /nt\ - Opus 33 1/3 16:58:58 10/8/20 (0)
- I still have the Hitachi 7500 mk 2 - Story 04:58:30 10/8/20 (0)