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In Reply to: RE: my MG20 tweeter went out the other day posted by Green Lantern on January 24, 2016 at 15:06:53
Well, in the long run, one like this worked for me..
My old tube amps are in storage, although I never had transformer issues or difficulty biasing the Transcendents (Bruce Rozenblit's tube amp designs were very user-friendly).
Cheers,
AuPh
Follow Ups:
It you had Transcendent's no wonder you had no transformer issues....aren't they OTL
(Output transformer less)? They are supposed to be great. Is the Magtech really similar-sounding?
I am interested because with my Stax electrostatic loudspeakers, which have a huge impedance in the midrange, no solid state amp that I tried sounded decent, and in fact only the Futterman OTL design really sang. I still have these, but I worry about the future.
My Transcendent amps are a pair of original Super Compact 150 monoblocks, built by Bruce before he started the DIY site. They worked flawlessly for years and were easily biased. The EL-509 power tubes for these are hard to come by these days, but I still have a reserve supply in case I decide to pull these little jewels out of storage. I'm sure that OTL's are fantastic, but I'm not sure they provide sufficient oomph for good sized planar speakers. It probably takes lots of $$$ power tubes for an OTL design with sufficient current for a thirsty pair of Maggies.
The Sanders Magtech amp is great, 900 wpc of clean power with little, if any sound signature of it's own. Plenty of headroom for a pair of Maggie 3.7(i).
Cheers,
AuPh
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