Voice coil diameter (mm / inch) 75 / 3” Impedance (Ohm) 2 x 2 Re (Ohm) 4.02 (serial) FS (Hz) 35.2 Qms 9.05 Qes 0.57 Qts 0.54 Le (mH) 2.73 Vas (Liter / cu.ft.) 28 / 0.99 MMS gr 513.65 Xmax (mm / inch) 62 / 2.44 SPL (1w/1m) 85 BL (Tesla – m) 28.29 Sd (cm²) 706.86 Power handling (Watts RMS/SPL) 2500 / 4000 Empfohlene Verstärkerleistung / Recommended amplifier power 2000 – 3000 WRMS @4 ohms (1 ohm)