Bunch of us in KC have done Hella supertones. Pretty straightforward - used a relay with a ground and went right to the battery. Sound is the best part. Really loud, what I would describe as a Euro tone. Much improved. Dave - BeaterGinKC >>-----Original Message----- >>From: Jack Ray [mailto:rjrjack@knology.net] wrote: >>So -- has anyone else installed a different horn(s) on a classic ?