Audison aP 8 aP-wOOFER 20cm/8" wOOFER 200 mm, 1 pair of grids Technical Specifications: Construction: wOOFER 200 mm mAh load. : 300 mAh 100 W rMS-impedance: : 4 ohms; frequency: 35 Hz - 3 kHz magnetsize: 90 x 40 x 17 mm depth: 66 mm internal dimensions weight: 174 mm each speaker: 1.2 kg schwingspulendurchmesser thiele: 0.984 In-small-d: 159 parameters: mm: 3.3 mm x max re: 3.1 fs ohms: 60 hz-mH 0.37 le: vas: 22.6 liters mms: 18 g cms: 0.4 mm n/bL tm 5: qts: 0.74 qes: 0.82 qes: 0.82 qms: 7 .6 dB spl: 93.5. Box contents: pack of 2 woofers, 2 x cover plates