Hey does anyone know what’s going on with the availability of the DSL100HR these days?? I own 2 each with the same similar problems: one, doesn’t give me any sound and 0.0 bias reading. The other gives me sound only on the 100watt setting and the bias goes only to 4.3 on one side and 3.7 on the other side. It does give me sound and kinda sounds ok but the level goes i I p and down and in and out. Never going from no sound to sound just like a power drop. Anyone know why and how this can be fixed hopefully.