A cheap subwoofer to match soundbars that's have subwoofer output like YAS109, Denon S216.
Copied from Amazon
Equipped with one 10-inch polymer-composite dynamic-balance cone driver
Laser-based Klippel measurement technology for improved linearity and deep, precise sound
Non-resonant all-MDF enclosure construction with 0.75-inch-thick baffles and internal bracing
Measures 14 by 14.38 by 16.12 inches (WxHxD)
Single 10-inch subwoofer in black with built-in high-current amplifier for big bass
Holy crap that's got to be a pricing error. Selling $449 from a quick Google elsewhere.
I have the 8" version PSW303 which sounds really decent for what it is. I'll bite the bullet and see if they honor this sale.