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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: REVIEW: Paul Speltz zero auto transformer Other posted by Marc Bratton on January 20, 2003 at 10:47:15:
So if you are going to spend $500 (or so) on an autoformer, why not get a valve amp with a decent output transformer - you'd save a load of money 'cause OTL designs can be really expensive. I agree to a point that it may be better to use the autoformer even on a decent valve amp, but i would point out that the autoformer is a torroid and not a great deal of valve amps use torroids as output transformers because of problems with DC imbalance etc; those that do use them are reputed to sound better over ones that use E/I or C cores.You are right that valve amps like higher impedance because they have a higher output impedance than a solid state version. This is particuarly true of feedback-free designs (since feedback lowers output impedance amongst other things).
Still if it works, then dont knock it i guess....
...which would explain why ESLs always sound better being driven by valve amps - because the impedance is better matched....
...so why dont they make higher impedance coil speakers any more?
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Follow Ups
- Paul Speltz zero auto transformer Other - Jim_P 11:20:18 01/22/03 (2)
- Good questions!... - Marc Bratton 20:17:15 01/22/03 (1)
- Re: Good questions!... - Jim_P 05:01:31 01/23/03 (0)
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