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Old 1st August 2011, 02:30 AM   #1
Stee is offline Stee  Italy
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Default Hybrid never see

this project is best my solution
and sounds very natural
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Old 1st August 2011, 03:28 AM   #2
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Are you sure that fried by DC speakers sound "the best"?
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Old 1st August 2011, 07:49 AM   #3
tomchr is offline tomchr  United States
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Hey man.... Don't dis the quality of a good thump.
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Old 1st August 2011, 11:12 AM   #4
Stee is offline Stee  Italy
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Default DC speaker

is less of 200mV with Suorce resistor 440 Ohm (220R+220R) @18V
also you have double NFB as DC servo
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Old 1st August 2011, 11:49 AM   #5
DF96 is offline DF96  England
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How do you get the FETs to work with no gate bias? Rely on a leaky coupling capacitor? And YASRPP (Yet Another SRPP!).
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Old 1st August 2011, 01:08 PM   #6
Stee is offline Stee  Italy
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Default yes need an input resistor

100K is good
original is this
STEREO FET BUFFER FOR DAC, PREAMPLIFIER, TAPE REC, ... | eBay
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Old 1st August 2011, 04:55 PM   #7
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Quote:
Originally Posted by Stee View Post
100K is good
May be, but does not it sound worse with this resistor?

As you stated in your first post, "sounds very natural"
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Old 1st August 2011, 07:03 PM   #8
Stee is offline Stee  Italy
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Default YES IT'S TRUE

this OS stage is so "light" and fast
that sounds like an OTL amplifier
and also strange... with 1,135 Vbias never have hotting time
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Old 2nd August 2011, 12:54 PM   #9
Stee is offline Stee  Italy
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Default More power?

K170 X 3
MJ350
ZENER 2,7V
2SA1940
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Old 2nd August 2011, 05:50 PM   #10
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Now it looks better. But for efficiency I would recommend to power driver from higher voltages than output followers.
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