Musical Fidelity A1x or A 120 which one is better ?

[Bernhard]

Hi,

I have A1 and could get A120, is it worth ?
Is A120 also pure classA ?

 

[philibuster]

dunno... but this guy might:
http://www.mhennessy1.f9.co.uk/mf_a1/others.htm

 

[jacco vermeulen]

Is A120 also pure classA ?

Both have a higher bias than convential class AB biased amplifiers, neither one is fully biased in class A.

 

[mastertech]

Hmm
Musical Fidelity a1, interesting...

 

[tiefbassuebertr]

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:
http://www.diyaudio.com/forums/solid-state/115284-musical-fidelity-a200.html

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.