Hi I have a marantz SR4500 with the tannoy FX5.1 speakers which has a 100wat amplified sub. It sounds perfect at -20db and is quite loud, but some days when the house is free i like to crank it up to -10 or -5 and that is as loud as i want it but the base is very rumbly and not very punchy, do yous know what i mean? It sort of rumbles and dosent give me the punch i need. (This is music btw) My whole room is concrete, its concrete walls, floors and ceiling so not sure if that matters. The sub isnt in the corner of a room but is against a supporting beam in the house. The subwoofer cable is a Ixos cable which cost me about £10 and is pretty thin compared to my digital cable going from my amp to my dvd player (Actually that just give me an idea so im testing it now...Hmm, It dont think i found much difference if any but the cable is a digital coaxle cable which are prob meant to for diff things). So what im wondering if yous could suggest some things to make it sound better? Any more information needed just ask Btw, i would like to spend minimal if i can, maybe about £30. Cheers EDit: Just wondering would getting a new set of bigger fronts for about maybe £100 make it sound any better since these speakers really arnt up to much cause of the small mid range speaker? I would love some floorstanding speakers but i dont really have the room for them in my bedroom.