RCF ART 710-A MK4 Powered Speaker.In its class, the ART 710-A MK4 is a unique product. The compression driver's high power voice coil and custom-designed dome provide exceptional vocal clarity and sound projection. A very linear response and a focused, deep low frequency control are features of the 10" woofer. Modern assembly technologies are used to create the transducers. The DSP that manages crossover, equalisation, phase control, soft limiting, and speaker safeguards controls the 1400 watt amplifier.