High-end features of these mixers include D-PRE discrete Class A microphone preamps for superior phase response and Xpressive EQ using Yamaha's VCM (virtual circuit modeling) for a more musical sound. Dual digital effects including an SPX block with reverb, delay and modulation effects and a dedicated REV-X high-density reverb engine, offer flexibility to build complex effects and enhance the sound quality. The mixers also include a ducker function, which automatically lowers the level of background audio to accommodate the voice of an announcer coming in on another channel. The Leveler automatically maintains a consistent sound volume when playing music from an iPod/iPhone or other audio source, including the USB port, which allows a direct digital connection to an iPod, iTouch or iPhone, also charges these units.
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