Harman Kardon - HKTS 210SUB 230 Subwoofer speaker set

Harman Kardon HKTS210SUB/230
See photo with signs of use

The Harman Kardon HKTS210SUB/230 is a powerful, compact active subwoofer designed to deliver an immersive cinema/music experience. With a built-in 200-watt amplifier and a 200 mm (8") down/firing driver, this model produces deep, rock-solid bass that you can feel physically, even at lower volumes. The sealed enclosure contributes to precise and controlled sound. It features both LFE and stereo RCA inputs, making it compatible with virtually any AV receiver or preamp, and it’s finished in an elegant high-gloss black color.

Specifications:
Low/Frequency Transducer: 200 mm (8") down/firing cone.
Amplifier Power: 200 Watts (FTC rated).
Frequency Response: 45 Hz to 200 Hz (at 6 dB).
Enclosure Type: Sealed enclosure.

The subwoofer works perfectly.
For a better impression, see photos.