BEHRINGER SPL3220 Stereo Multiband Sound Processor/Loudness Maximizer/Limiter Black Professional multiband sound processor for public address, broadcasting and mastering applications Multiband technology provides for brilliant and lively audio processing without audible pumping artifacts Loudness maximization to achieve ultimate signal density for public address and competitive broadcast sound Leveler automatically adjusts signal density for harmonized loudness and enhanced listening experience Protects speaker systems that are submitted to continuous operation at maximum SPL