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166XL Compressor / Limiter / Gate


  • Goof proof operation to smooth uneven levels, add sustain to guitars, fatten drums or tighten up mixes
  • New gate timing algorithms ensure the smoothest release characteristics
  • Program-adaptive expander/gates
  • Great sounding dynamics control for any type of program material
  • Separate precision LED displays for gain reduction, compression threshold and gate threshold allow quick, accurate setup
  • Stereo or dual-mode operation
  • Balanced inputs and outputs on 1/4″ TRS and XLR
  • Side Chain insert
  • Classic dbx® “Auto” mode


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Input Connectors: 1/4" TRS and XLR, Floating Balanced; XLR: Pin 2 hot Phone: Tip Hot HI
Input Impedance: >50kΩ balanced, >25kΩ unbalanced
Max Input: +24dBu, Balanced or Unbalanced
CMRR: >40dB at 1kHz, typically >55dB
Sidechain: 1/4" TRS Phone, Normalled: Ring = Output (send); tip = Input (return)
Sidechain Impedance
Tip = >10kΩ (Input), Ring = 2kΩ (Output)
Sidechain Max Input Level: +24dBu
Output Connectors: 1/4" TRS phone and XLR floating balanced, XLR: Pin 2 and Tip Hi
Output Impedance: 120Ω balanced, 60Ω unbalanced
Max Output: +21dBu,>+20 dBm into 600Ω, balanced or unbalanced
Frequency Response: 20Hz - 20kHz; +0, -0.5dB, Typical 3dB points are 0.35Hz and 110kHz, unity gain
Noise: <-90dBu, 22Hz to 22kHz, no weighting, unity gain
THD+Noise: Typically <0.04%; Any Amount of Compression Up to 40dB@1kHz
IMD: Typically <0.08% SMPTE @ +10dBu (15dB Gain reduction)
Compressor Threshold Range: -40dBu to +20dBu
Compressor Threshold Characteristic: Selectable OverEasy® or hard knee
Compressor Ratio: Variable; 1:1 to Infinity:1; 60dB Maximum Compression
Compressor Attack Time: Variable program-dependent; 3ms to 340ms for 15dB gain reduction
Compressor Release Time: Variable program-dependent; 200dB/Sec to 3dB/Sec
Expander/Gate Threshold Range: OFF to +15dBu
Expander/Gate Ratio: 10:1
Expander/Gate Max Depth: >60dB
Expander/Gate Attack Time: <500µs (from Maximum Depth)
Expander/Gate Release Time: Adjustable, 30ms to 3sec (to 30dB attenuation)
Limiter Threshold Range: 0dBu to +20dBu
Gain Adjustment Range: Variable; -20dB to +20dB
Interchannel Crosstalk: <-80dB, 20Hz to 20kHz
Dynamic Range: >115 dB
>Stereo Coupling: True RMS Power Summing™
Power Consumption: 15 Watts Maximum
Operating Temperature: °C to 45°C (32°F to 113°F)
Dimensions: 1.75" x 19" x 6.75" (4.45 cm x 48.2 cm x 17.15 cm)
Unit Weight: 5.05 lb (2.29 kg)
Shipping Weight: 7.20 lb (3.27 kg)
Reference: 0dBu = 0.775Vrms