Sound issue with Silvers

[ghuinink]

Hi all,

I'm starting to hear a slowly increasing difference in sound between my 2 Silvers.

It is very good audible when i play something completely mono, the difference in color is so big the sound seems to be stereo.
Mostly coming from the left speaker.

when i swap the mono sound from left to right both seems to be ok, no major differences. Highs are there, lows are there, so nothing really broken.

But it is the clearest with mono spoken vocals, seems to come way more from left than from right.

Anybody have a solution for this?

Thanks,
Geert.