JBL CINEMA 300 | 5.1-channel home cinema system with active 150-watt subwoofer
JBL ESC300 Simply Cinema Dolby Surround System SUPERB Subwoofer Sub ~ RARE WHITE 50036174169 | eBay
JBL Bar 2.1 Deep Bass - Sound bar system - 2.1-channel - wireless - Bluetooth - 300-watt (total) - black | Dell USA
JBL ESC 300 Complete 5.1 Home Cinema System - 5 Speakers and Subwoofer | Reverb
JBL SB 300 review: JBL SB 300 - CNET
JBL SUB300 Simply Cinema Dolby Subwoofer Only for ESC300 System. Not Tested 50036174169 | eBay
Amazon.com: JBL Studio 550P 10-Inch Powered Subwoofer : Electronics
Focal Sub 300 P Powered subwoofer (black)(each) Focal Sub 300 P Powered subwoofer (black)(each) - - It's Free! : New Audio & Video, New Electronics at Lowest Prices!
JBL SUB300 Simply Cinema Dolby Subwoofer Only for ESC300 System. Not Tested 50036174169 | eBay
JBL XTI 300 subwoofer for around 250 dollars. A good deal? : r/BudgetAudiophile