Honestly if you have issues with the volume, I think the best thing you can do is to mount the standard control set right near your steering wheel and turn the volume all the way up to 5. It is far, far easier to hear alerts from that thing not only because of the volume, but because of the frequencies used. The other alternative, of course, is to use the Hi Fi Control Set, and mount the speaker on the side of the driver's headrest, pointed directly at your ear.