Infinity - Primus PS-8 Speaker

The Infinity Primus PS/8 is a compact active subwoofer that excels at adding tight, musical bass to any stereo or home theater system. It features an 8-inch Metal Matrix Diaphragm (MMD) driver, an exclusive Infinity technology that provides exceptional stiffness and clarity in the lower frequencies. The built-in 100-watt RMS amplifier delivers ample power for dynamic playback, while the variable crossover and phase switch allow seamless integration with your existing speakers. Due to its modest size and strong performance, it is an excellent choice for medium-sized rooms where you want the impact but not the footprint of a larger subwoofer.

Specifications:
Amplifier Power Output: 100 Watts RMS
Low/Frequency Driver: 8-inch (200mm) MMD cone, front-firing
Frequency Response: 35 Hz – 150 Hz (±3dB)
Crossover Frequency: 50 Hz – 150 Hz, continuously variable (24 dB/octave slope)

The subwoofer works perfectly.
For a better impression see photos