They are powered: 960W RMS 2100W peak:
V1811
Design Vented
Driver 18" High Excursion
Powered Yes
Amp 960W RMS (2100W PEAK)
Enclosure CNC machined MDF
Frequency Response 16Hz-200Hz +/-3dB
In-Room Extension 11Hz-14Hz
Size (DxWxH) 22" x 20" x 24" with grille
Weight 108 lbs
https://www.powersoundaudio.com/products/V1811
V1811
Design Vented
Driver 18" High Excursion
Powered Yes
Amp 960W RMS (2100W PEAK)
Enclosure CNC machined MDF
Frequency Response 16Hz-200Hz +/-3dB
In-Room Extension 11Hz-14Hz
Size (DxWxH) 22" x 20" x 24" with grille
Weight 108 lbs
https://www.powersoundaudio.com/products/V1811