diyAudio

diyAudio (https://www.diyaudio.com/forums/index.php)
-   Solid State (https://www.diyaudio.com/forums/solid-state/)
-   -   Musical fidelity A1 all recapped but sounds muffled (https://www.diyaudio.com/forums/solid-state/219667-musical-fidelity-a1-recapped-sounds-muffled.html)

analog_sa 14th September 2012 06:03 AM

Quote:

Originally Posted by cretaceous (https://www.diyaudio.com/forums/solid-state/219667-musical-fidelity-a1-recapped-sounds-muffled-post3163733.html#post3163733)
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.

Boscoe 14th September 2012 07:15 AM

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.

Tajzmaj 14th September 2012 07:34 AM

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


All times are GMT. The time now is 11:16 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 17.65%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio

Wiki