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Old 13th November 2005, 11:37 AM   #1
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Default Musical Fidelity A1x or A 120 which one is better ?

Hi,

I have A1 and could get A120, is it worth ?
Is A120 also pure classA ?
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Old 14th November 2005, 09:13 AM   #2
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dunno... but this guy might:
http://www.mhennessy1.f9.co.uk/mf_a1/others.htm
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Old 14th November 2005, 10:14 AM   #3
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Default Re: Musical Fidelity A1x or A 120 which one is better ?

Quote:
Originally posted by Bernhard
Is A120 also pure classA ?
Both have a higher bias than convential class AB biased amplifiers, neither one is fully biased in class A.
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Old 14th November 2005, 08:21 PM   #4
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Hmm
Musical Fidelity a1, interesting...
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Old 9th December 2012, 09:24 AM   #5
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Quote:
Originally Posted by Bernhard View Post
Hi,

I have A1 and could get A120, is it worth ?
Is A120 also pure classA ?
The A1 I had runs in pure class-A, as long the current into the speakers isn't more than twice of those value from idle current through the output (noted in the attached schematic).
Now I have a damaged A120 (front plate overprint) respective A200 ISS4 (PCB overprint)
Unfortunately I haven't schematic. But the 230VAC torodial transformer itself provides 2x 26VAC so the VDC value must be approximately 2x 32V (this value is from A1 2x18V5).
observe also this thread:
Musical Fidelity A200 ?
Quote:
Originally Posted by jacco vermeulen View Post
Both have a higher bias than convential class AB biased amplifiers, neither one is fully biased in class A.
You are right in case of low impedance speakers like ribbons e.g.
Attached Files
File Type: pdf C ...-A-Musical Fid A1-X ISS7-II.ckt.pdf (21.0 KB, 50 views)

Last edited by tiefbassuebertr; 9th December 2012 at 09:28 AM.
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