RCF EVOX 12 Powered Speaker.Due to the included 1400W power amplifier, the EVOX 12 is the most potent line-source in its class and provides a particularly rich and dramatic reproduction at loud volumes. Eight high performance neodymium 4 "full-range transducers with a phase plug are located in the top part. The EVOX 12 offers a broad dispersion for the highs and a greatly improved low-mid playback at a steady level as a result. The 15" subwoofer provides strong bass sound to support a large party or a live band's kick drum. In spite of its excellent performance, the enclosure is incredibly small and portable because to its built-in wheels and extensible handle.