I have used Jabra BT320s Bluetooth headsets for some time to listen to music on my desktop PC, under Vista and Windows 7. Although all the same model, they have dramatically different maximum volume settings (which I’m guessing are hardware related in some manner). It can be handy to use the graphic equaliser in Windows Media Player to boost the volume, especially of radio programmes I’ve recorded on my DAB radio. When I upgraded to Windows 7 it came with Windows Media Player 12, and the graphic ......