Pair of SEISMIC AUDIO 18" PA POWERED SUBWOOFER Active Speakers 800 Watts Each | eBay
Amazon.com: Seismic Audio - 18" Raw Subwoofer/Woofer/Speaker - PA DJ Pro Audio Replacement : Musical Instruments
Amazon.com: Seismic Audio - Package - Two 18 Inch PA Subwoofers PRO Audio Band Speaker Cabinets Sub - Band, Bar, Wedding, Karaoke, DJ, 18" Cabs 1000 Watts RMS : Musical Instruments
The Quad-18 - 4 x 18 Inch Subwoofer Cabinet | 4x18 Sub Woofer | Seismic Audio
Used Seismic Audio Tremor 18 Powered Subwoofer | Guitar Center
18" Subwoofer Driver Speaker / Sub Woofer / Raw Speakers – Seismic Audio