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Electro-Voice TX1181 500-Watt 18" Subwoofer, Black - ProAudio.com
BIC America™ Acoustech H-100II 12" 500 W Frontfiring Powered Subwoofer with Black Lacquer Top | Quill.com
beFree Sound 5-Speaker 500-Watt Black 5.1 Home Theater Speaker System in the Home Theater Speaker Systems department at Lowes.com
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THX 500W 10" Subwoofer Active Powered Sub Woofer Bass Home Cinema Built-In Amp | eBay
JBL Stage A120P Powered subwoofer at Crutchfield
HT/1205 - 500 Watt Subwoofer | REL
4) HC655 6.5" 500 Watt Black In-Ceiling Home Theater Speakers+JBL Subwoofers | Reverb
BIC America 500-Watt Black 0.1 Home Theater Speaker System in the Home Theater Speaker Systems department at Lowes.com
10) HC655 6.5" 500 Watt Black In-Ceiling Home Theater Speakers+JBL Subwoofers | Reverb
Amazon.com: Monolith M-10 V2 10in THX Certified Select 500 Watt Powered Subwoofer - Piano Black Finish | Massive Output, Low Distortion, for Studio and Home Theater Systems : Electronics
Amazon.com: Acoustech H-100 Cinema Series 500-Watt Front-Firing Subwoofer, High-Gloss Black : Electronics