Studio Monitors & Speakers
the box pro A 218 LA Subwoofer
the box pro A 218 LA Subwoofer, Active Double 18" Subwoofer, With 4" diaphragm compression driver, Class D amplifier, Power: 2x 2000 W, Frequency response: 36 - 100 Hz, Maximum sound pressure level: 141 dB, 4 Presets: Standard, InfraSub, Cardioid or...
https://www.bizrate.co.uk/musicalinstrumentmonitors_speakers/the-box-pro-a-218-oid5258855663.html