Custom Ported Sub Box Enclosure for 1 12" JL Audio 12W3v3 W3 Subwoofer - 30 Hz | eBay
MOD: MT12-800A SUBWOOFER ATTIVO -Potenza totale 1600 W -800 W RMS- woofer RCF da 12- 4,0″ VC- risposta in frequenza 30 Hz- 250Hz- 128 db SPL Max - Worldsonic
Amazon Echo Sub P5B83L Subwoofer System – Charcoal – 30 Hz – Wireless LAN – Wulus
Amazon.com: Pyle 8-Inch Carpeted Subwoofer Tube Speaker - 400 Watt High Powered Car Audio Sound Component Speaker Enclosure System w/ 2” Aluminum Voice Coil, 4 Ohm, 30Hz-700kHz Frequency - Pyle PLTB8,Black : Electronics
Amazon.com: Seismic Audio - T10Sub - 10 Inch Steel Frame Subwoofer Driver - 200 Watts RMS Replacement Sub Woofer for PA, DJ, Band, Live Sound : Musical Instruments