#html-body [data-pb-style=E28GV5D]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll} The AP 4 midbass offers very extended frequency response, both in high and low frequencies, combined with high efficiency and features a 25 mm pure copper voice coil to ensure more balance in mid-high frequency ranges. Technical Specs Nominal diameter - 100 mm (4 in) Impedance - 4 Ohm Power Handling - 120 W Peak Power Handling - 40 W RMS Sensitivity - 91 dB Frequency Response - 80 ÷ 7,5k Hz Voice Coil Ø - 25 mm Magnet size D x d x h - 70 x 32 x 10 mm (in.) Xmax - 1.8 mm (0.07 in) Electric-acoustic Specs Re - 3.2 Ohm Fs - 125 Hz Le - 0.16 mH Vas - 1.5 l (0.053 ft) Mms - 5 g (0.176 oz) Cms - 0.3 mm/N BL - 3.4 T•m Qts - 1 Qes - 1,2 Qms - 7.6 General Weight - 0.4 kg