Right now on Amazon you can buy a Polk Audio 10-Inch Monitor Series Powered subwoofer for $69.99 down from $239.95. You will also receive free shipping. Keep in mind that prices on Amazon can change at any time.
- Single 10-inch subwoofer in black with built-in high-current amplifier for big bass
- 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)