this so called "800 watt" bass tube MIGHT be using 100 watts(its advertised as 600 but has "800 watts" written on the speaker). the frequency control is really just another gain control. if it isnt turned up to 90% or better you cant hear anything. the same goes for the gain. when i turned the gain & frequency both to 90% the sound quality was poor & wasnt loud by any means. i purchased this attempting to replace my 8 year old 200 watt 10" bazooka tube. my bazooka tube even being 8 years old and having a smaller woofer is more than twice as loud, hits twice as hard & is much cleaner sounding. i was being very lenient when giving this item a 2 star rating. 1 star was for its quality appearance & the other was for the fact that it did power on & does work. it should have been advertised at 80-100 watts rms so that very little was expected. with "800 watts" written largley in the center of the subwoofer it makes your expectations much too high....save your money!