It has been about a week since I built my sonosub(http://frank18202.tripod.com/sonosub...ion/index.html). I ran most of the reference material that I have(Titan A.E., Saving Private Ryan, Star Wars TPM, T2 Ultimate Edition, etc.) Mostly impressed by the THX intro from TPM it was scary!!! And everything in T2 was incredible. Now my concern, I live in a bi-level house and my theater is located in the basement family room. For the first time I went to get a drink and I felt everything, and I mean everything vibrate to the point that is this going to damage something??? I then proceeded to sit in my upstairs recliner and during the Pod Race scene (-5 from reference) I felt this very strong sense of energy(bass). It was GREAT!!! All I am powering this is with a 10 year old Technics amp with a built EQ. I have a huge bump in the 50-63 hz region. In the near future I plan on buying a BFD and a Samson s700 or a QSC amp. This kind of bass is unbeleivable.