Focal ISUB Twin | Sub Powerful Compact Passive Underseat Car Subwoofer | 2x 100w RMS
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SUBWOOFER - AXTON ATB216 Compact Bandpass-Subwoofer DOPPIO 2 x 16 cm | eBay
MK Sound V10 Compact Subwoofer digital switch mode 200 watt RMS miller kreisel | eBay
Amazon.com: BESTISAN Powered 6.5'' Home Audio Subwoofer, Deep Bass Response Subwoofers in Compact Design, Easy Setup with Home Theater Systems, TV, Speakers, RCA, Black : Electronics
Rel Acoustics T-Zero: the best small subwoofer to boost your compact speakers? - Son-Vidéo.com: blog