https://flash.newegg.co
JBL Studio SUB 250P 10" Powered Subwoofer (Black)
$15 Promo Gift Card with Purchase
•10" PolyPlas low-frequency transducer for tight, extended bass response
•200-watt Class-D high efficiency amplifier features unobtrusive rear-mounted inputs and controls for easy set-up and system integration
•Sophisticated, 21st century visual design features that can’t fail to seduce
Normally $450, and reviews are good.