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RE: "OTOH you are probably stone deaf above 16 kHz" ...

Posted by andyr on February 15, 2017 at 15:42:04:
That may well be true, neo, but let me relate a story which indicates to me, anyway, that we can respond to much higher frequency sounds than 20Khz.

The first version of my single-ended, jfet-based 'Muse' phono stage that I built about 5 years ago was regarded by the people who listened to it (comparing it to other phono stages) as being slightly rolled off in the treble. This first version was a circuit that came out of Silicon Chip in the late 80s.

A mate modelled the circuit in LTspice and told me that the simulation showed a LP roll-off at 120Khz. This was caused by a cap which had been put there for stability reasons ... but probably wasn't necessary.

So I removed this cap - and the phono stage no longer sounded dull in the treble! So we could hear the effect of a LP filter at 120khz! who woulds think it!! ;-))

Re. current through the ribbon - surely "V = IR" where:
* R = 2, and
* V = 2.3v at 6khz

... means I = 1.15a?

And W = I^2R means the amp was delivering 2.6 watts at 6Khz.

Whereas with V = 0.9v at 30Khz, I = 0.45a and W = 0.4 watts.

Andy