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As you changed the caps in both channels, check polarity on all changed caps in the left channel, and check and adjust voltages according to manual.
Location: Mexico city
What Søren says. Particularly the idle currents. A very bad setting of idle current can cause an awful sound.
Then isolate the problem circuit by cross-connecting left/right channels;
Lift one pin of C200 and C300 respectively and cross-connect to feed the left channel signal source to the
right channel tonecontrol and amplifier and vice versa.
See if the muffled sound is still coming out the same speaker.
Note the results, put everything back and then do the same with the amp inputs C219 / C319.
This will fairly easily give you (and us) an idea where to look further.
Let us know what you find.
Martin
Start with a basic diode test on all transistors....
As many others..Dear True Blue
I believe you should calm down with this kind of overstated comment.
Regarding B&O products Mr Martin DILLEN is the technical reference and is always available for guiding.
In addition the 1900/2400 is the one he knows a lot.
Enjoy your B&O experience
Alain
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