Looking to tighten up your mix, tame unruly vocals, or add punch to your drums? The dbx 166XL dbx Professional Audio is an industry-standard dynamics processor that packs a professional compressor, limiter, and noise gate into a single, rugged rack unit Sweetwater. Whether you are setting up a home studio or running live sound Visual Impact, this versatile unit delivers classic dbx sound quality and reliable control Reverb. Key Features: Goof-Proof Operation: Effortlessly smooth uneven levels, add sustain to guitars, or fatten up drums dbx Professional Audio. OverEasy & Hard Knee Modes: Switch seamlessly between smooth, invisible compression and aggressive, classic peak control Reverb. Advanced Gate Circuitry: Program-adaptive expander/gates with updated timing algorithms ensure ultra-smooth release characteristics, even on complex signals SmartMice. PeakStopPlus Limiting: Safely tame sudden signal spikes and protect your gear and recordings from clipping Sounds Market. Flexible Operation: Use as two independent mono channels or link them with True RMS Power Summing for perfectly locked stereo images. Versatile I/O: Features balanced XLR and 1/4" TRS inputs/outputs, plus sidechain functionality for advanced frequency-dependent processing dbx Professional Audio 1 knob is replaced by a not origional one. See pictures for details. Will be carefully packed and shipped.