hi guys id like to make a home made subwoofer with the use of an old car audio driver i have but i need a good amplifier to drive the thing the speaker unit is a velodyne df12sc servo controlled unit with the servo control its a 12" sub and the box measurement size should be sealed with around 1.7 cu ft volume or around 46-48 litres if anyone knows of anywhere that sells a brand new box of around the correct size ill buy one or if not ill make one the amplifier must be able to produce up to around 300 watts r.m.s when called for and must have very little in the way of subsonic filtering as the servo control needs to be calibrated for the unit to work correctly its gonna be used with a pair of atc active 50sl loudspeakers as they roll off a little too early and im missing some of the lower octave notes will mainly be used for music but with a little home theatre as well cheers nath