https://archivedforum.beoworld.org:443/forums/30.aspxA Forum for Technical Help and Support on Bang & Olufsen products over 25 years old.enCommunityServer 2008 SP2 (Build: 31104.93)https://archivedforum.beoworld.org:443/forums/thread/140048.aspxSun, 07 Sep 2008 07:06:04 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:140048Mohawk0https://archivedforum.beoworld.org:443/forums/thread/140048.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=30&PostID=140048<p>Hi</p><p>I would start by cleaning the tone control pots. Take them apart and clean the carbon track very gently, clean the contact track from any oxidation and clean the &quot;fingers&quot; that touch the tracks from oxidation. Then put some contact cleaner on the tracks to protect them. Reassemble.</p><p>/Fredrik</p><div style="clear:both;"></div>https://archivedforum.beoworld.org:443/forums/thread/140034.aspxSun, 07 Sep 2008 04:34:31 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:140034Alex0https://archivedforum.beoworld.org:443/forums/thread/140034.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=30&PostID=140034<p>I've got a BeoMaster 900 + BeoVox 500s which I plan to put in my study at school. However, the right-hand channel has quite a bit more low-end and midrange presence than the left hand channel, which I have narrowed down to the bass tone control. When at full, both channels are even, but below full, the left hand channel drops away considerably quicker than the right.</p> <p>What can be done?</p><div style="clear:both;"></div>