SUBWOOFER CELESTION

The CS135 subwoofer is designed specifically for operation in a three-piece system. Like the satellite speakers, it is a black box and weighing 9kg.
Internally, the CS135 is a dual-chamber design, combining a 10-liter sealed enclosure with a 12-liter vented enclosure that opens into the room through a duct 7cm in diameter.

The CS135 contains a single 23 cm woofer with a dual voice coil, driven at low frequencies by both stereo channels and generating an L + R (mono) bass output.
The CS135 contains the crossover to the satellites, set at 112 Hz with a 12-dB-per-octave low-pass section feeding bass to the subwoofer and 6-dB-per-octave high-pass filters supplying middle and high frequencies to the speakers
It is a passive sub.
It is in a very good shape and sound very good.

You need some deep bass its a good choice