- Extended Pole Piece with Aluminum Shorting Ring
- Hi-Roll Foam EROM Surround
- Kevlar Reinforced Nonpress Pulp Cone
- 4.0″ BASV 4-Layer Flat Aluminium Voice Coil
- Quad Layer Deep Bass, High Excursion Spider System
- Triple Stack High-Grade Ferrite Magnets, 381oz
- Back Plate Voice Coil Gap Venting
818d: 1000w to 2000w – 18 Inch Power Tuned Subwoofer
Speaker Size (In): | 18 |
Watts RMS: | 1000 - 3000 |
Watts Peak: | 6000 |
Impedance: | D2 |
VCD (In): | 4 |
Piston Diameter (In): | |
Fs (Hz): | 29 |
Qms: | 4.606 |
Qes: | 0.579 |
Qts: | 0.514 |
Vas: | 101 |
dBSPL: | |
Xmech (IN): | |
Xmax (MM): | 29 |
Frame OD (In): | |
Frame OD w/Gasket (In): | 18 1/2 |
Mounting Diameter (In): | 16 39/94 |
Mounting Depth (In): | 11 11/32 |
Motor Diameter (In): | 9 19/64 |
Motor Depth (In): | 4 17/32 |
Magnet Weight (Oz): | |
Woofer Displacement (CuFt): | |
Ported Enclosure (CuFt): | 5.0 - 6.0 |