https://community.sony.no/t5/portable-audio/mex-bt3100u/m-p/1486282#M2156 You can't change treble or bass because they have installed digital equaliser in it which you can change like vocal ,gravity ,edge or xplode. Fri, 10 Jan 2014 20:18:04 GMT saqib-butt 2014-01-10T20:18:04Z https://community.sony.no/t5/portable-audio/mex-bt3100u/m-p/1463542#M2127 <P>How do you adjust the "treble" on this player as i cant seem to find a treble setting on it ?</P> Sat, 21 Dec 2013 17:19:46 GMT https://community.sony.no/t5/portable-audio/mex-bt3100u/m-p/1463542#M2127 qwerty454 2013-12-21T17:19:46Z https://community.sony.no/t5/portable-audio/mex-bt3100u/m-p/1486282#M2156 You can't change treble or bass because they have installed digital equaliser in it which you can change like vocal ,gravity ,edge or xplode. Fri, 10 Jan 2014 20:18:04 GMT https://community.sony.no/t5/portable-audio/mex-bt3100u/m-p/1486282#M2156 saqib-butt 2014-01-10T20:18:04Z