I have a Brand New, never plugged in, Polk HTS12 Subwoofer in Washed Black Walnut
Product info:
- bass-reflex (ported) enclosure with down-firing Power Port® for clear, accurate bass
- 12" front-firing polypropylene woofer
- 200-watt RMS (400-watt peak) Class D amplifier
- frequency response: 28-120 Hz (-3dB)
- RCA line level/LFE (low frequency effects) input
- variable low-pass crossover control
- phase switch to acoustically match the subwoofer's output to your main speakers
- automatically powers off when it no longer receives signal from the receiver
- 17-3/16"W x 18-13/16"H x 20-1/16"D
- weight: 49.9 lbs.
See more here: https://www.polkaudio.com/en-us/product/archive/archive-subwoofers/hts-12/112632.html