New Fi IB Woofers
This just in from Blade ICE
The IB3 Series of subwoofers is our higher power handling infinite baffle subwoofer line. Featuring a double stack of high grade magnets with a heavily bumped T-yoke for clearance under high excursion. Along with single high excursion progressive spider, a multilayer foam surround attached to a fibre-impregnated kraft pulp cone helps keep things under control. A 3in two or four-layer voice coil yields 30mm of Xmax while keeping moving mass low. The IB3 sets the standard for full featured infinite baffle specific subwoofers. From the subtle nuances of a stand up bass, to the bottom octave filling-rattling scene in your favorite movie, the IB3 has you covered. 
IB3 Series: 12in, 15in, and 18in
Single 2 and Single 4 Ohm
Cast basket
Wrap around gasket
Kraft pulp fiber reinforced cone
Single layer wide foam surround
Push terminals
Extra heavy lead wire
FEA optimized motor
3in diameter two or four-layer coil
Double stacked magnets
Single progressive spider
Prices range from £170 to £230
Also watch out for a 22in version, Yes an IB3 22in! About as much displacement as two 18in drivers!