SET Asylum

Single Ended Triodes (SETs), the ultimate tube lovers dream.

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RE: Sound Practices Information.....

Posted by GSH on June 28, 2012 at 16:13:56:
"What happens here is that the rolled-off Italian design reproduces FAR more highs than the amp that has much more H.F. extension-- but not into a H.-EFF. speaker-- the extension to 35,000 HZ (as an example) is only on paper-- it is real enough if the amp is driven hard, but it DOES NOT occur in a H.-EFF. SPEAKER when the amp IS NOT driven hard.."

So, if it IS "driven hard" then are we back to equal (other than gain) ?

The main reason I left the hi mu driver, was I didn't need the gain, in fact a mu of 18 is still more than I need. This means that I'm using more than half of my available 2V of signal from the source, whether a CD player or a phono-pre, and, of course, ATTENUATING LESS. Is this "driven hard" ?

In addition, regardless of Rp or Miller issues, selected lo mu drivers can be measurably if not also audibly, lower distortion, because they are more linear, period. This is usually a good reason to use such an item, right?

I always thought hi mu triodes were for situations where hi-gain was needed, accepting the fact that there's a distortion "penalty" for such an "advantage". I think this is basically still true?

The real question is whether or not hi mu equates to higher low level sensitivity. "technically" is doesn't...

I'll admit, that once I made a direct coupled SE parafeed amp with a CCS loading a lo mu driver, I hadn't heard anything better, and was also amazed by the low level retrieval. The amp also had 2 less caps in the signal path...You may want to try it Dennis, use your front end if you prefer.