JBL LSR310S 10 inch Powered Studio Subwoofer With XLF - Extend your system LF all the way down! 

*OPEN BOX - Unit has been unsealed and briefly used for a demonstration in-store, it will be completely as-new with full warranty besides some signs of wear on the packaging*

Features:

• The LSR310S subwoofer incorporates JBL’s patented Slip Stream Port working in concert with a custom 10” down-firing driver and a 200 Watt amplifier to add deep, powerful bass to any studio monitor system. 
• A JBL first, the XLF Extended Low Frequency setting lets you hear your tracks with the augmented bass tuning used in today’s dance clubs.