Andy Evans wrote:

So, you're saying it's OK to have a cap here but not *there* ? EY..

What I'm saying is you eliminate one cap by DC coupling to the grids of
the amplification stage (I believe Jim says you can do this with ss
devices, which is absolutely fine).

Yes, that's entirely fine.


The conventional way would be capamplification stagecap.

It would be ? Do elaborate.


To be precise, my DAC has a balanced output into the grids of a diff
pair with a CCS under it, so the CCS determines the current through the
stage. AE

Good. Excellent design priciples there. I'll venture that the CCS is
semiconductor though.


Meaningless waffle, selective ignorance and obfuscation. EY...

Well it may be meaningless to you, but I've built four of these so far

So ? The products I've designed have sold in hundreds, thousands and tens of
thousands. What's the big deal ?


and done a range of comparative listening tests over the last 6 months
with a number of colleagues (engineers, if that makes a difference).

It might do. Who are those 'engineers' ?


If
I built them in ignorance and hid them under a tarpaulin I must have
been bloody lucky they all worked.

What's your point ?

Graham