Focal Polyglass SB 21 V2 - user opinions

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Summary: Type: subwoofer; Size: 25 cm (10 in.); The number of bands: 1; Power: 250 W (nominal), 500 W (maximum); Sensitivity: 85 dB; Frequency range: 45 Hz to 500 Hz; Built-in amplifier: no; Housing: yes; Enclosure type: closed box; Dimensions (WxHxD): 233x290x378 mm; Number of speakers: 1; Dimensions: 250 mm; Additional information: Dimensions ...

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