Presonus ACP88 8 Channel compressor, limiter, and gate The ACP88 gives you total dynamics control for multi-tracking and live sound reinforcement. Eight compressor/limiters deliver transparent dynamics control. Eight full featured gates seamlessly control unwanted noise and bleed-through. Control vocals, tame drums, protect speakers, tighten the low-end all from just two rack spaces of powerful processing. Features Eight Full Featured Compressor/Limiters Eight Full Featured Gates Side Chain on Every Channel Trigger Inputs on Every Channel Balanced/Unbalanced I/O Comprehensive Linking via Unique Power Summing Bus Takes the Place of Multiple Processors Crystal Clear Compression&Gating for Multi-Tracking&Live Sound Allows Spectral Processing&Gate Keying via Separate Jacks +4/-10 Stereo Operating Level