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Re: transient test - Part II

Thanks Scott,

One theory about why my "no feedback" amp sounds good is because
all the hi-order harmonics are not just way down (> 90dB), but
way, way down (> 120dB). I only have an uncal'd HP-334 and take
this with a grain of salt...but with 8.38vrms on the secondary
of the transformer at 100Hz, I measure .1% THD. I can't really
claim anything about how far down the hi order harmonics are with
a measurement like this.

As Charles suggests below, this amp is impractical to manufacture.
That is a consideration why some people would look to alternative
technologies (I'm not a manufacturer).

By getting things really linear using lots of feedback in solid
state (or any other technology), it seems like similiar results
can be achieved (good sound).

One thing I notice about the multiplication hump is that with
low feedback, the hi order harmonics are way way down. As more
feedback is applied, these hi order harmonics shoot up. They
start coming down again, as more feedback is applied - but
lazily...that is...it takes a lot of feedback to get them back
to the same levels as the low feedback case.

So it looks like for instance, in the case of the Sziklai or the
Hawksford that the large amounts of feedback are present. I think
that the approach you are looking at seems like a very good
direction to head.

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