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RE: Class D for Acoustats

"The problem with the feedbackless tube amps is that they go REALLY loose in the bass. "

This is probably due to their using too small iron in the output tranformers.

Tube amps with sufficient output iron do not have loose bass. My Friend's VAC 30/30, for example, runs without feedback (it is actually switchable in 1db steps from zero to 6db) and has fantastic tight but very tuneful and musical bass. Same goes for the better SET amps I have heard.

You need to have it running in triode I think because that gets you a much lower plate resistance and makes the transformer design less problematic.

"SETs without feedback do this even better. Once you get used to them you develop the Futterman crossover distortion allergy and PP circuits sound broken to you. "

That is the truth.


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  • RE: Class D for Acoustats - morricab 08:10:01 02/26/16 (0)

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