Features: DUG (DUal Gauss) - Magnetic field technology DOV (Dual Opposing Voice coil technology HVA (Horizontal and Vertical Alignment Conex spider assembly BAEISV hybrid voice coil former Dual 3-inch, 2-ohm voice coils Large treated foam high excursion surround Collar-lock aluminum mounting ring Ceramic 5 magnet structure (3 neodymium) & 2 ferrite) Cast aluminum 5-piece basket Multi-vent back plate Non-pressed paper cone with MD6 coating Platinum screw terminals Stone gray hammered finish Wood packing crate with chrome appointments PATENT PENDING RMS POWER (WATTS) : 1000 MAGNET WEIGHT (Oz.) : 320 FREQ. RESPONSE (Hz) : 25 - 1.4k Fs (Hz) : 33.5 Qes: .0.471 Qms: 2.0628 Qts: .0.3835 Vas (Ft3) : 0.983 Xmax (INCHES) .051 SPL (dB) : 87 HOLE SIZE (INCHES) : 11.25 WOOFER DEPTH (INCHES) : 8.0 RECOMMENDED ENCLOSURE (Ft3) : 0.75 RECOMMENDED ENCLOSURE TYPE : Vented AEROPORT DEMENSIONS (INCHES): 3 x 12 (1)