Pioneer TS-300D4 - Twin 12" Subwoofer with Twin 12" Box Enclosure
 
Specifications:
Maximum input power 1400 W
Nominal input power 400 W
Impedance 4Ω (2Ω / 8Ω)
Frequency response 20 - 100 Hz
Lowest resonance frequency 43 Hz
Sensitivity (1W/1m) 96 dB
Woofer size 30 cm
Woofer material IMPP Composite Cone
Voice Coil type Copper, 4-layer
Dual 4Ω voice coils: 2 or 8Ω 
Voice Coil bobbin type Aluminium
Pole Yoke Type Extended and Vented pole yoke
Magnets Ferrite (double)
Terminals Push-type
Screw Terminals 8
Dimensions 326,6 x 168,5 mm
Weight 6.20 kg
Cut-out Hole 281 mm
Mounting Depth 147 mm
Surround Dual Layer, Fiber Reinforced Elastic Polymer Surround
2" Double Box Specifications:
Double 12" 2.56cu.ft 3/4" MDF box
Dimensions: 30" (W) x 14" (H) x 12.5" (Bottom Depth) x 8.75" (Top Depth)
Partitioned in the middle.
Carpeted in black.
Gold-plated terminals at either end.
Pre-built (glued inside all corners for optimum seal)