Epiphone guitar and hammerons?

its not the guitar, you need better effects pedals or amp. make sure it's on the treble pickup, not rhythm, and try to get a good distortion pedal with good high end. also, i'm not sure which part youre talking about in regards to the hammer ons and pull offs, but if you're talking about the main riffs, it shouldn't be dying, its not that long, you're just not hitting it hard enough. they also pick often. if you're talking about the solo, then it's also not that long, get a good distortion pedal and hit the frets harder. a delay pedal would also make it sound better.