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Old 30th August 2012, 09:22 PM   #11
sonnya is offline sonnya  Denmark
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For all here in this thread.. I have made an error in the guide. Trimmer R22 should be turned CCW first before powering up.

After powerup bias is set by turning CW.
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Old 31st August 2012, 08:38 AM   #12
Salas is online now Salas  Greece
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Clean short guide, Sonny. Thanks for adding that paper.
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Old 31st August 2012, 08:56 AM   #13
Salas is online now Salas  Greece
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P.S. Are you a bit unhappy with the bass? Mentioning only great mids and highs in the guide. The analogous 2 stage p2p Nico like SSA has very good bass for instance in my experience. Or is it just against higher power, higher FB other amps of yours?
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Old 31st August 2012, 09:03 AM   #14
sonnya is offline sonnya  Denmark
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The bass is fine. But it has mosfet sound over it. But compared to Audio Research VT100, i think it is equally good.

But i have made the powersupply more stiff since the test at Michael...
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Old 31st August 2012, 09:51 AM   #15
Salas is online now Salas  Greece
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There is VT200 Mark I in a good friend's system with Harbeth SHL5s which are a manageable load for TSSA so I will have means to investigate too. Not imminent in the builds line, but it won't remain in the drawer either.
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Old 31st August 2012, 10:06 AM   #16
sonnya is offline sonnya  Denmark
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Quote:
Originally Posted by Salas View Post
There is VT200 Mark I in a good friend's system with Harbeth SHL5s which are a manageable load for TSSA so I will have means to investigate too. Not imminent in the builds line, but it won't remain in the drawer either.
Tomorrow we Will make a test on eggleston works and maybe on a set avalon Acoustics ...

More Will follow.
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Old 31st August 2012, 10:13 AM   #17
Salas is online now Salas  Greece
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If its the Eidolon it took an FM Acoustics prosound genes amp to sing in an installation I did once after it was pushing the owner's Naim Nap 500 to stridency at high SPL times, not an easy speaker at all. TSSA will be great on 93dB+ 4 Ohm or 90dB+ 8 Ohm non quirky Z speakers IMHO.
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Old 31st August 2012, 10:45 AM   #18
sonnya is offline sonnya  Denmark
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I think that at the moment, he is running them on the small pass amps...

But lets see.

The play well on the large JMLAB grand utopia.
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Old 31st August 2012, 10:46 AM   #19
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Quote:
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If its the Eidolon it took an FM Acoustics prosound genes amp to sing in an installation I did once after it was pushing the owner's Naim Nap 500 to stridency at high SPL times, not an easy speaker at all. TSSA will be great on 93dB+ 4 Ohm or 90dB+ 8 Ohm non quirky Z speakers IMHO.
Sorry to butt in here; but what if the output devices are doubled or single 16Amp 250Watt devices are used? Driver current may need to be increased slightly.
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Old 31st August 2012, 10:51 AM   #20
sonnya is offline sonnya  Denmark
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I have tested it with single 16amp. This will lower the output impedance of about 40% but the gfs is also 4S instead of 2S... This means a doubling of the openloop gain.
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