I've just bought a sub with a built in amplifier with auto on off. It sucks. When listening to music at softer levels which I sometimes do, especially classical, the sub turns itself off, and then you need to wind it right up to get ti back on. Any ideas on how to defeat the on/off. Will I need to have the amp modified or replaced? The sub weighs over 100lbs so I'd prefer not to lug it anywhere. I have plenty of spare amplifier channels, so could use those to power the sub. Thanks Steve BTW, the amp is a rather low grade Australian one made by 'Altronics'.