Focal Car Audio PSB200 8" Passive Subwoofer with Sealed Subwoofer Encl – Car Audio Centre
Citronic CASA-15B 15" 500W Passive PA Subwoofer | Audio Volt — Audio Volt
Electro Voice ZX1 Passive Subwoofer | PMT Online
Max15SUB 15" Passive Subwoofer
sony passive subwoofer ss-wsb91 | eBay
Wharfedale Pro Wharfedale Delta X-15B 15" Passive Subwoofer - Speakers from Prebeat UK
Wharfedale Pro Wharfedale Delta X-218B Dual 18" Passive Subwoofer - Speakers from Prebeat UK
Citronic CASA-10B 10" Passive Subwoofer 300W
AUNA Two Hi-Fi Subwoofers, 80W RMS Passive Subwoofer Speaker for Home Theatre System, Big Bass, Compact Design, 100W Max Hifi System, AUX Input for MP3 & CD Players, Volume Control, Auto-Off :
LD Systems SUB 88 8-inch Passive Subwoofer | Bax Music