Probably the best amplifier this side of the galaxy
Joel - SYMEF
Paulo - SYMEF
http://www.diyaudio.com/forums/solid-state/198500-symef-amplifier.html
Joel - SYMEF
Paulo - SYMEF
http://www.diyaudio.com/forums/solid-state/198500-symef-amplifier.html
S/S amps cope perfectly well in the loudspeaker cabinet. Most studio actives have them there and although it is partly for convenience, I don't think they'd do that if there were serious problems with it. I think that's probably an old hi-fi myth put about by the manufacturers of separate amplifiers.
The actives I've heard certainly have fewer problems than most conventionally separated amplifiers/speakers that I've heard. And, as I said, they have most of the benefits of single driver with some advantages over them.
Anything with caps in it (to bring forward the biggest offender) is subject to microphonics. Not that i've yet found a SS amp i could live with for the midtweeter.
dave
Give your speakers a treat, go SYMEF. There a few constructors in your area, they might bring the SYMEF during the audio fest. Your speakers will come alive 😉
You might even consider offering your speakers plus HAL amplifiers as a kit 😀
I'm always happy to take the opportunity to audition.
What is the output impedance? Anyone made one into a variable transimpedance amplifier?
dave
What is the output impedance? Anyone made one into a variable transimpedance amplifier?
dave
As close to zero as it can get. With a resolution of one decimal point it is actually zero. It works great as a voltage amp.
Most of my speakers prefer amps with a higher output impedance, your amp might not fair well if one makes it here.
dave
dave
SYMEF doesnt mind any speaker 🙂. SYMEF will tame any speaker 😀. SYMEF has tamed many speakers 😛.
However there are also some good output transformers available.
However there are also some good output transformers available.
Not all amplifiers work with all loudspeakers. One of the best SS amps i've heard was a variable transconductance amp, once the output impedance was dialed in for a speaker it was great. And almost every speaker liked to be at a different setting.
dave
dave
FWIW the most musical & transparent fully SS amp I've yet heard is:
http://www.pimmlabs.com/web/solid_state.htm
and Gary's severely tweaked out Behringer wasn't hurtful either:
http://www.pimmlabs.com/web/behringer.htm
mind you that was about 4yrs ago, so things may have advanced since then
or not
http://www.pimmlabs.com/web/solid_state.htm
and Gary's severely tweaked out Behringer wasn't hurtful either:
http://www.pimmlabs.com/web/behringer.htm
mind you that was about 4yrs ago, so things may have advanced since then
or not
Yes on Feedback (lots i understand), for the rest you'd need to talk to the designer, Daniel (aka Duo), he has at least one thread on the subject.
I do know it had a very high bandwidth, it was adapted from a current amp for driving the electron guns in a CRT.
dave
Hi Chrisb, that was an interesting read.
Thats the kind of image I had concocted Planet10. I do still believe SYMEF is the clear winner here.
Thats the kind of image I had concocted Planet10. I do still believe SYMEF is the clear winner here.
Our ears are different, but our perception of correct is pre-filtered to our ears. That's all we know.
Yep, ditto on that. Super clean, very nice amp. But don't forget, it's a Solid State "Tube Amp". 😀
Spent a lot more time with the Fostex. I still can't get what the single driver thing is about. Horrible breakup at 6800, a bottom end that can barely make it to a sub and distortion several times as high as I expected. This thing is far more evil than my crossovers. What am I missing?
It would be interesting to hear Mr. Pass and Mr. Curl comment on that little FET idea.
It would be interesting to hear Mr. Pass and Mr. Curl comment on that little FET idea.
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