Ground Zero GZIW 12XSPL-D2

12″ High-power XSPL subwoofer Klippel optimized New reinforced paper cone with 3D honeycomp structure 2.5″ copper voice coil High-roll sandwich surround progressive 2-layer spider Push terminals Don´t get fooled by the affordable price! These budget class XSPL-monsters are designed with Klippel-optimization to squeeze out every single desibel that is possible to get. Voice coil cooling is very efficient and long excursion gives you a LOT of bass. Very linear impedance curve makes it possible to really extract all the power from the amp to these subwoofers. - 12″ XSPL Subwoofer - Progressive 2-layer spider - Voice coil 63 mm / 2.5″ - Impedance 2 x 2 Ohm - Re 4.33 Ohm - Fs 32,5 Hz - Qms 10.76 - Qes 0.79 - Qts 0.73 - Vas 40.4 L - Le 2.48 mH - Mms 231 gr - Bl 15.9 - Xmax 34 mm / 1.34″ - Effiency ( SPL 1w / 1m ) - Power handling ( SPL ) 1000 Watts - Rec. amplifier power 500 - 1000 Watts - Outer diameter 310 mm / 12.2″ - Mounting cut out 285 mm / 11.22″ - Mounting depth 162 mm / 6.38″ Recommended enclosures: - Vented 45L net - Port 10cm / 4″, length 21cm - Bandpass ( 4th order ) 25L net sealed / 40L net vented - Port 10cm / 4″, length 11cm - Tuning frequency Fb 57 Hz -Bandwith 35 - 100 Hz.