<font color='#000000'>Well when it’s very loud sometimes it does got bouncing around and I say sometimes because the hole thing is EXTREMLY heavy, the driver on its own weighs 13kg + another 40kg of the furniture that’s about 53KG, but because of the very VERY high power that this speaker can handle (almost 1000Wrms) it is logical that sometimes it goes for a walk.
Now probably you didn’t notice I have to port’s installed on the back tuned at 45hz, but I still have a problem with the base. There is a small gape between the floor and the furniture’s base so that at very high volumes causes some small whispering sounds that cant be heard easily. So I’m working on a new base system, which will have a more open-air gap underneath.
Rip Van Woofer you wrote: “With the base of the table right against the floor all the way 'round, and no visible grills or ports for rear (of driver) radiation, where does the sound come from?”
As you might know the low frequencies aren’t directional so you can feel them even if the speaker isn’t facing you, especially with frequencies from 100hz and down…
This is what was written about the driver I used:
The most powerful 18" in our product range, 2000 W continuous program power handling, defines the "state of the art" about LF reproduction. A four inch copper wire voice coil with very high thermal capability and a ventilated magnet assembly allows a low power compression. A very low distortion figure is obtained using a double spider design and dual demodulation rings in the magnetic path. Proprietary water-proof cone treatment for safe use in adverse climatic conditions.
Link: http://www.thielesmall.com/database.asp#
</font>
