Hello, in my bedroom I have a speaker system consisting of an Onkyo TX-SR605 reciever, Creative GigaWorks S750 satellite speakers and i have a custom monoblock amplifier running a Sony bass reflex subwoofer, from a HT-SF1300 speaker system. My problem is that when i turn the speakers up, the sub is vibrating the floor more than it should. I can't hear the bass as much as i'd like to, so i turn it up, and the sub just starts vibrating the floor excessively. Is there anything i can do to make the sub make more 'sound' than vibrations? I want to be able to feel the bass and hear it, rather than feel the floor shaking. I hope you guys can understand what I mean, this problem is not related to the frequency of sound being too low or anything like that. Thanks for any responses.