On my motorcycle I have a small bridged amp listed at 35RMS driving two 3-inch speakers. Above about 60 mph, there's not enough volume to hear the speakers. Also, at times, I'd like to listen to music/radio/books through my helmet headset. Is there a way to use standard headphones on a bridged amp without having to rewire both sides of the headphones so they wouldn't have to share ground? Since we're talking motorcycle here, I'm not tremendously concerned about high quality audio reproduction. While searching the "Great Void" of the internet I saw a suggestion for using 1:1 output transformers on each leg of the speaker outputs, and that would then allow me to use standard headphones with a shared ground on the headset side and avoid having to rewire headphones. I suspect I'd need some sort of attenuation, too, going to the headphones...and probably a switch or two to change from headphone to speaker. Is this way too involved and complicated? Is there an easier answer? Maybe in the end, it would be easier to have a separate headphone amp along with the amp for the speakers. Any suggestions?