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In Reply to: RE: I've been using... posted by sk on May 04, 2014 at 06:00:46
Thanks for posting... I went to your website, and that's a very nice lineup of companies you represent. Needless to say, I really like your taste in OTL amps!!
Regarding the superiority of the impedance-doubling taps of the Zeros with your M-60 and Novacron amps on your 6-ohm Acoustic Zens (very nice speakers)... do you think that's because the amps sound their best into the resulting 12-ohm load, or because the Zero sounds its best when only asked to step up the impedance by a factor of two, or some combination thereof? I realize that question may be impossible to answer, but ask it just in case.
Thanks!
Duke
Me being a dealer makes you leery?? It gets worse... I'm a manufacturer too.
Follow Ups:
I have MA-1s paired with Daedalus Ulysses, and use the Speltz autoformers in the 4X mode. It just sounds best this way. . .around 24 ohms.
I would have thought that the MA1 would require no autotransformer help to drive the Daedalus. Doesn't the Daedalus have a higher than 8-ohm nominal impedance, to begin with?
I believe the nominal impedance is around 6 ohms on the Ulysses.
I am surprised that you are apparently less happy with either no Zero or Zero used at a much lower multiple of impedance, like 2X or 2.7X, compared to 4X. I guess you've tried all the other options.
Nice combination!
And thanks for letting me know what impedance setting works best with your MA1 + Zero + Ulysses system. Very interesting that such a high impedance is what you've found to work the best. This is quite encouraging for what I'm hoping to do.
Duke
Me being a dealer makes you leery?? It gets worse... I'm a manufacturer too.
Hi Duke ~ for me that's impossible to answer it's just what I hear however I had an EE over a few months back who is rebuilding an older Novacron and he says the Novacrons like to see a 12 ohm load because of (and then he started talking above my pay grade!!).......
Maybe Ralph can chime in and give us his thoughts.
(Dealer disclaimer)
12 is good, 16 is even better. So my guess is that the ZERO has its own limitations. Generally, the less you make it do, the less sonic footprint it has.
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