The dbx 166XS is a professional dual-channel compressor, limiter, and gate engineered to deliver comprehensive dynamics processing in a single rack space for live sound, studio, and broadcast applications. As the latest evolution in dbx's legendary compressor lineage, this unit combines patented OverEasy compression technology with program-adaptive expander/gates and PeakStop limiting to provide smooth, musical performance while protecting expensive amplifiers and speakers from damaging transients. The 166XS makes it easy to smooth uneven levels, add sustain to guitars, fatten drums, and bring vocals forward in any mix with greater clarity.

Each channel features independent compression controls with switchable OverEasy soft-knee or hard-knee characteristics, variable ratio from 1:1 to infinity:1, and dbx's exclusive AutoDynamic attack and release circuitry that automatically adapts to program material for effortless setup. The integrated gate section includes advanced timing algorithms ensuring smooth, artifact-free closure on vocals, drums, and other sources, while the PeakStop limiter provides an absolute ceiling for peak excursions. Comprehensive connectivity includes balanced XLR and 1/4-inch TRS inputs and outputs, sidechain inserts for external processing, and switchable +4dBu or -10dBV operating levels. Stereo coupling with True RMS Power Summing maintains rock-solid imaging when channels are linked, while separate precision LED displays for gain reduction, compression threshold, and gate threshold allow quick, accurate setup at a glance. Housed in a rugged 1U steel chassis with easy-to-read backlit switches, the dbx 166XS delivers legendary dbx sound quality and reliability in a versatile, cost-effective package.