RockSolid, will soon be installed at the home of the Spice Girls. Click here to read the full story plus pics.

For use vertically or horizontally on glass or other smooth, non-porous materials. The SD1g is attached with a double-sided adhesive disc. The SolidDrive SD1g works excellently on windows, acrylic and granite sheets, and nearly any other rigid non-porous surface.
Features a 7-year warranty
 
 
Type Full Range Transducer
Impedance 8 Ohm
Frequency Response (Hz) 60 Hz to 15 kHz
Recommended Amplifier Power 10 - 100 Watts
Dimensions 2.28" Dia. x 2.08" (H) Mounting Plate 3.5 Dia. 1.1 lbs./ 500 g