Difference between revisions of "Musical Fidelity Power Amplifier"
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Something that amuses me - reviews often say that the phono stage was much-improved, but as far as I can tell, it's exactly the same as the A1! | Something that amuses me - reviews often say that the phono stage was much-improved, but as far as I can tell, it's exactly the same as the A1! | ||
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| + | '''Related Musical Fidelity models:''' | ||
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| + | The A1 David [http://www.mhennessy1.f9.co.uk/mf_a1/others.htm] | ||
| + | The A1 Final Edition [http://www.mhennessy1.f9.co.uk/mf_a1/others.htm#final] | ||
| + | The A100 and MA50 [http://www.mhennessy1.f9.co.uk/mf_a1/others.htm#a100] | ||
Revision as of 13:39, 6 October 2007
The A100:
Released in 1986, the A100 (A100X) is a beefed up A1 in a slightly taller case producing 50 watts per channel. To achieve this, there's a bigger transformer giving higher supply rails. Musical Fidelity claim that it operates in class A 99% of the time, so by my reckoning, there's 1.75 amps of standing current per channel, resulting in around 160W of heat dissipation. To cope with this, there are two fans, which become noisy with age. When the bearings get tired, they slow down and the reduced airflow leads to reliability problems. Also, they suck dirt and dust through the case...
The output transistors seem to be the same 2n3055/MJ2955 combination as used in the A1. I'm surprised at this frankly, and failures are all too common. All other comments about the A1 apply to this model, so check for noisy controls and dried up electrolytic capacitors...
Something that amuses me - reviews often say that the phono stage was much-improved, but as far as I can tell, it's exactly the same as the A1!
Related Musical Fidelity models:
The A1 David [1] The A1 Final Edition [2] The A100 and MA50 [3]