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Musical fidelity A1 all recapped but sounds muffled
Musical fidelity A1 all recapped but sounds muffled
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Old 14th September 2012, 07:03 AM   #11
analog_sa is offline analog_sa  Europe
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Join Date: Aug 2002
Location: Cascais
Originally Posted by cretaceous View Post
SO.. any ideas what I can change to improve things?

In the future do not: "recapped it, replaced power transistors, psu diodes and a few burnt resistors" in one go, but take time to listen after every change. If there are no obvious errors, the likeliest culprits are indeed the caps. Why don't you go back to the old ones and see if your old sound is back?

I can see this making some people very unhappy Even more than you.
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Old 14th September 2012, 08:15 AM   #12
Boscoe is offline Boscoe  United Kingdom
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If you used cheap caps for input coupling the the ESR might be quite high at high frequencies giving a poor frequency response. Like others have suggested try adding one 100nF cap in parallel and make it a good film cap.
Audio projects and more: gswdh.co.uk
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Old 14th September 2012, 08:34 AM   #13
Tajzmaj is offline Tajzmaj  Slovenia
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Join Date: Mar 2011
Location: Ljubljana
if you replaced c5, c11, c12 than check those for correct values again. I wouldn't bother too much about grade of elcos. One could sound different than other but can't change frequency response much unless it is defective or very different value.
If you won't solve the problem, I'll be back in London on Tuesday and can help you. I live in NW1.
Cheers, Taj
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