Polk Audio 840 MM - user opinions

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Summary: Type: subwoofer; Size: 20 cm (8 in.); The number of bands: 1; Power: 250 W (nominal), 500 W (maximum); Sensitivity: 89 dB (W/m); Frequency range: 26 - 200 Hz; Impedance: 4 Ohm; Housing: no; Recommended housing: closed box; Number of speakers: 1; Dimensions: 203.2 mm; Cone material: polypropylene; Material suspension: butyl rubber; Moun ...

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