RCF NX 910-A Powered Speaker. For solo artists, bands, and DJs, NX 910-A is expertly developed from the bottom up to give outstanding audio performance. A constant directivity waveguide, two-channel 2100W amplifier, 1.75" compression driver, and 10" woofer work together to deliver coherent 100° x 60° listening area coverage with up to 130 dB SPL of distortion-free sound. The NX 910-A combines great performance and dependability in a small package and can be used as a satellite speaker (with subwoofer), stage monitor, flying speaker, or standalone speaker for a FOH system. The NX 9 Series speakers from RCF are precisely adjusted for each model, giving unmatched clarity and a deep, potent bass response. They do this by combining their unique FiRPHASE and Bass Motion Control DSP processing.