My new-to-me 2005 GL1800 is a great machine, but the sound system is anemic. At full blast, it can't be heard above 60 mph, and basses and trebles are 'mushy'. The sound advance with speed doesn't seem to work at all. Big contrast with my '94 GL1500, which has great sound quality and volume even blasting along on the interstate. I had read that replacing factory speakers with Show Chrome's replacement speakers helps, but found the PO had already done this; since I had already bought new speakers, I put them in anyway, to no avail. Someone else suggested the amp on the radio itself might be shot. I've thought about an in-helmet system, like JM, that plugs directly into the radio, but not sure I want the wires and am concerned about hearing traffic around me. Anyone had this issue and addressed it?