Last week Saturday,I just attended the SVS subwoofer launching event at Crystal Crown hotel with my wife.My wife was complaining why we could not feel the bass and the vibration even they were demoing 2 subwoofer at the same time which is a super huge sub!Since this Svs sub is been much highly praised in the western country,I was very dissapointed about the sound quality and the lack of bass during the demo!Was it due to lack of calibration or the sub is under power?even my room size 20 x 35 feet length and im using 2 JBL 12ich Sub and my room could feel the bass and vibration when they were demoing the Transformers movie starting scene when the helicopter create alot of vibration and also we can feel the bass when the helicopter landed and the shock wave scene during the helicopter transformation and explotion from the helicopter,I can feel the bass from my sub.But none of this feeling happen during the show at SVS showroom.Is it the SVS sub underpower?And also the speaker is too bright and irritating to me n my wife ears!Is it because of the speaker characteristic or the amplifier characteristic?Even some forum members stated that even from next door they could feel the vibration is all BULLSHIT!as i was in the room i could not even feel it.What actually happen during the demo is up to everybody's opinion.So can i have some comment from other forum members?