I am using the USB in saddle bag with settings at “low” for SRS and “mid” on AVL. Bass is flat and treble half up. I ride at volume 15 and it is blaring loud at speed after the volume raises with the stock speakers. It is medium at idle. Bass is strong and solid and treble is sharp and crisp. Raising the volume to 18 is about same level at speed with the “AVL”. I have stock GL1800 exhaust which is silent at speed with radio off.