AudioCircle
Audio/Video Gear and Systems => Owner's Circles => Vapor Audio => Topic started by: planet10 on 30 Dec 2017, 10:12 pm
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Hi,
The question of use of a SET with the Nimbus recently arose, and no impedance curve could be found to see how well matched a high output impedance SET would be with this speaker.
I wonder if someone has this measured curve?
dave
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Hi,
The question of use of a SET with the Nimbus recently arose, and no impedance curve could be found to see how well matched a high output impedance SET would be with this speaker.
I wonder if someone has this measured curve?
dave
Dave - PM Pete Schumacher. If he can't help you, he will know who can
http://www.audiocircle.com/index.php?action=profile;u=4797
gab
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Thanx, i will.
dave
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The Nimbus impedance curve is not very flat, but that's easily fixed with a compensation network. If you intend to use a high output impedance (low/no feedback SET) let me know and I'll work up the conjugate network you can place on the output of the amp to flatten the impedance.
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The system in question is Steve’s of Empirical Audio. You may already have tuned up his XO, but he was batting zero when asked about it — he seemed to lack an understanding of the potential issue.
http://www.diyaudio.com/forums/digital-line-level/314762-dac-blind-test-audible-difference-whatsoever-post5291478.html (there are relevant posts before & after)
I will cross-post your reply so he knows to contact you. Thanx again.
dave
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Steve's XO is not tweaked for use with no-feedback SETs. However, the SET he's using has enough feedback that the small impedance swings will be well tolerated.
I am intimately familiar with Steve's SET amp. I have a pair of the same monoblocks, as well as the schematic. He's good to go without an impedance conjugate network.
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For those not also following the thread on diyAudio i replied to the same reply Peter put up on diyAudio.
http://www.diyaudio.com/forums/digital-line-level/314762-dac-blind-test-audible-difference-whatsoever-post5292905.html
Thanx again Peter.
dave