My '86" sound system was slowly going down hill. I know they're a lot of tech fixes and upgrades out there. but I'm sound system impaired, so here is a great cheap upgrade.
Pull the fairing signal covers off and remove the stock speakers, replace with Wal-Mart replacement upgrades, about $30 bucks, buy a cassette tape adapter $6 bucks(Wal-Mart with the cord adapter.) borrow your kids IPOD(after they put your music on a playlist), plug it in ,stick it in the leather side pocket and WOW what a great sound,works even in a high wind..