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RE: 6SL7 Ratings

Hi,

> I could not find the original review that
> had the measurement - even after a 200+ sites.

As you omitted to mention what review it was I did not find it either, but it took google and me around 20 seconds to locate this...

http://www.merlinmusic.com/vsm_wht.htm

This is Merlins own page on features of the VSM Speaker, which includes the Dynaudio Esotar, Dynaudio's best (two levels up from yours, but very much measuring the same).

It contains this graph:

This graph shows the phase of the whole speaker, as well as the frequency response, arguably 10 degrees off axis. It shows first of all quite substantial phase rotation (predictable) due to the crossover, however above around 5KHz we get the phase of the Dynaudio Esotar alone.

It shows small amounts of phase-errors around the -270 degrees phase of the tweeter, however at the top of the tweeter passband we see the phase rapidly changing, eyeballing (the graph is quite small) around 30 degrees at 20KHz and 90 degrees at 24KHz.

> But your assertion that I have 90 degrees
> of phase shift at 20KHz is wrong.

You are correct. I was wrong, yo do not have 90 degrees phasesift DUE TO THE TWEETERS EXCESS PHASE ALONE (ignoring the crossover) at 20KHz.

You have 90 Degrees at 24KHz. I stand corrected.

Ciao T
Thor

At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?

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