I need some help here. I've got an older golliath jr.II, that's great for small gigs. I really don't push this box much at all, but I keep blowing speakers. Actually it sounds like the voice coils. I keep replacing them with rebuilt originals from swr. They only last 6 to eight months. What else can I put in this box that would keep the weight down and still sound good? This is such a great small, light box, I don't want to screw it up.