I noticed the tone knob on the vox amplug and the one on my bass very similar, so now I just put the amplug tone knob to 10 and just adjust my bass's tone knob. But something tell me that there must be a use for it, if not vox wouldn't have put it there? Since I assume most bass guitar should have a tone knob? So I am interested to find out is the tone knob just something that can be ignored? Or there's a use for it that I haven't discovered it yet?