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In Reply to: RE: Dyna ST70 with Harbeth P3 posted by BillH on August 16, 2020 at 09:24:36
If you listen to music with wide dynamic range inefficient speakers and a Dyna ST70 may not be a good combo(and decades ago I used a Stereo 70 and AR2a speakers before big amps). It may have been rated at 35 watts/channel but it really only is about 20 watts implying clipping at about 96 dB. Fortunately it clips nicely so not playing loud or in a big room you can get away with it. But more power is better.
The above specs are taken from a ST-70 testing article by Dave Gillespie (link to full article below). What would account for the increased wattage he was able to achieve (over your "about 20 watts") from a stock unit? Better tubes?
I remember trying a ST-70 on a pair of Dhalquist DQ-10s years ago. Talk about a mismatch. But as you said, it was OK for quiet listening.
I believe I've found the 20 watt test results.
this is interesting. Do you think they rated 35/ch at 5% distortion?
"Bass is the place..the rest is filigree and lace" Doug Sax
Above is Dynaco's figure, from their assembly manual. A far cry (whatever that means) from 5%
That link in one of my above posts shows a complete, modern testing of an original ST-70.
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