Specifications:
12″ SPL subwoofer
Klippel® optimized
Reinforced paper cone with 3D honeycomb structure
Long stroke compound surround
Resonance free GZ steel basket
63 mm / 2.5″ copper voice coil
2-layer Polycot-Conex spider
IMPP dust cap with 3D structure logo
Model High-Quality SPL subwoofer
Diameter 30 cm / 12"
Power Handling (RMS/SPL.) 600 / 1000 Watts
Impedance 2x 2 Ohms
Power Recommendation 500 – 1000 Watt 
Voice Coil 63 mm / 2.5" Copper
Membran Layout Reinforced paper with honeycomb structure
Max. Excursion (Xmax) 34 mm / 1.34"
Mounting Ø 285 mm / 11.22"
Mounting Depth 162 mm / 6.38"
Resonance Frequency (Fs) 32.5 Hz
Overall Qaulity (Qts) 0.73
Equiv. Air Volume (Vas) 40.4 L / 1.43 cu.ft.