Monitoring & Accessories Mackie - 'DRM212' 12" Powered Loudspeaker. Mackie - 'DRM212' 12" Powered Loudspeaker. Mackie’s filtering technology is not your typical speaker processing. The goal of our Advanced Impulse™ DSP is to remove all the anomalies that loudspeakers and horns contribute to a signal, from “honkiness” or “squelch” to "mushy" low end, effectively making the drivers "invisible" and output nothing but perfect, clean sound.
eBay