I've had tinnitus in one ear for years, I tried the ACS custom ones, but didn't find them any better than the generic 'christmas tree' ones, my tinitus has not got any worse, any earplugs are going to do the job, at a recent gig I forgot to put them in after the break, it was painful without them, they take off the top end which is handy when you've got a drummer that hits the cymbals as hard as ours does.