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Amazon.com: KICKER TRTP 8-inch (20cm) Thin Down Firing Subwoofer and Passive Radiator Enclosure, 2-Ohm, RoHS Compliant : Electronics
Amazon Basics Pair of 20 cm Round Speakers for Wall or Ceiling : Amazon.com.be: Electronics
Amazon.com: Pioneer TS-A2013i 20cm 3 - Way Speaker Accelerate 500w Max : Electronics
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1 Woofer Master Audio CW800/4 CW 800/4 Speaker 20 cm 200 mm 8 Inch Diameter 150 Watts Rms and 300 Watts Max 4 Ohms 93 DB Car Doors 1 Piece : Amazon.com.be: Electronics
Coppia woofer 20 cm 8 Ohm 8" pollici ** 200w x 2 ** altoparlanti 200mm 21 cm 210mm ricambi casse acustiche attive o passive : Amazon.it: Altro