RCF NX-912-A Professional Active SpeakerNX 912 A is masterfully engineered from the ground up to deliver stellar audio performance for solo musicians, bands, and DJs. The combination of 1. 75" compression driver, 12" woofer, two channel 2100W amplifier, and a constant directivity waveguide produces coherent 100 x 60 coverage for the listening area with up to 130 dB SPL of distortion free sound. Used stand alone speaker for a FOH system, satellite (with subwoofer), stage monitor, or flown