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In Reply to: RE: New installation of my A-S OTL amps posted by jeffreybehr on June 14, 2019 at 20:36:30
I've been running M60s since 2001 nonstop on my AG Duos and tried the little experiment you're currently involved in. When the smoke cleared (figuratively) I was satisfied with the performance when using only half of the full complement of 6AS7s in all areas save the bass, which got a tad looser and flabbier in spite of my bass drivers being active. I could've lived with it but preferred not to so back in went the rest of the power tubes...electric bill be damned.
Follow Ups:
...despite having a full complement of tubes, you do have the shorting plug in V1, so you're not getting the full power output the M60 is capable of.
marc g. - audiophile by day, music lover by night
...by shorting V2 but by still using 8 output tubes per channel vs 4, the amps output impedance is halved as compared to 4 6AS7s per channel. Obviously, this is advantageous for the performance of fully tubed up version.
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