I am listening to my music CDs through my DVD player via an optical digital output to my Toshiba DD RPTV and then into Eltax millennium Power tower speakers with a built in active sub. At higher volume levels it sounds crap and the speakers seem to be distorting. For listening to Movies etc half volume is plenty loud enough and is sounds great. For listening to Loud rock music and 80s disco type (through just the 2 front external speakers (and sub)) and turning the volume up to about 80% it is terrible. I would have thought that my TV amp would not provide enough power to distort the speakers. The speakers are rated Music power 150w, nominal power 100w, frequency response 30 22.000 Hz, impedance 4-8 Ohms. I can change the low pass crossover frequency for the sub between 50 and 250Hz. I normally set it about 80. Help. PS Yes, I know its my own fault for listening to 80s disco music but any constructive help on what I need would be appreciated.