DBX 266xs
2-Channel Compressor / Expander / Gate


Adding a dbx® 266xs Compressor/Expander/Gate to your live sound rig or studio gives you more dynamic control to help create a more polished, professional sound. Having compression in your audio chain gives you the ability to smooth out uneven levels, add sustain to guitars and fatten up your drums. It also makes it easy to bring vocals to the front of your mix - adding greater clarity and making them stand out from the surrounding instruments.

The 266xs is the latest in a long line of the world's most successful compressors from the inventors of the technology. Its patented Overeasy® compression technology provides smooth and musical performance while the AutoDynamic™ attack and release controls, found only on dbx compressors, puts great sound within easy reach. The 166xs can operate in stereo or dual-mono modes, has true RMS power summing and features quality XLR and 1/4" TRS inputs and outputs. It cuts no corners on visual feedback with gain reduction metering and easy-to-read backlit switches.

dbx 266xs Features:

  • Error 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-mono operation
  • Balanced inputs and outputs on 1/4" TRS and XLR connectors
  • Side Chain insert
  • Classic dbx® "Auto" mode

dbx 266xs Specifications:

  • Input Connectors:  1/4" TRS and female XLR (pin 2 hot)
  • Input Type:  Electronically balanced/unbalanced, RF filtered
  • Input Impedance:  40 kOhm balanced/unbalanced
  • Max Input:  > +22dBu Balanced or Unbalanced
  • Output Connectors:  1/4" TRS, female XLR (pin 2 hot)
  • Output Type:  Impedance-balanced/unbalanced, RF filtered
  • Output Impedance:  +4dBu: 100 Ohm balanced, 50 Ohm unbalanced; -10dBu: 1 kOhm balanced, 500 Ohm unbalanced
  • Max Output:  > +21dBu balanced/unbalanced into 2kOhm or greater; >+18dBm balanced/unbalanced (into 600 Ohms)
  • Sidechain:  1/4" TRS Phone, Normalled: Ring =Output (send); tip = Input (return)
  • Sidechain Impedance:  Tip = >10 kOhm (Input), Ring = 2 kOhm (Output)
  • Sidechain Max Input Level:  Tip = >+22dBu (Input)
  • Sidechain Max Output Level:  Ring = >+20dBu (Output)
  • Compressor Threshold Range:  -40dBu to +20dBu
  • Compressor Threshold Characteristic:  Selectable OverEasy® or hard knee
  • Compressor Ratio:  1:1 to Infinity:1
  • Compressor Attack Time:  Scalable Program-Dependent AutoDynamic™
  • Compressor Release Time:  Scalable Program-Dependent AutoDynamic™
  • Expander/Gate Threshold Range:  -60dBu to +15dBu
  • Expander/Gate Ratio:  1:1 to 4:1
  • Expander/Gate Attack Time:  <100µs
  • Expander/Gate Release Time:  Program-dependent
  • Bandwidth:  0.35Hz - 90kHz, +0/-3dB
  • Frequency Response:  Flat: 20Hz-20kHz, +0, -0.5dB
  • Noise:  <-93dBu unweighted (22kHz measurement bandwidth)
  • THD+Noise:  Typically <0.2%; Any Amount of Compression @1kHz
  • IMD:  Typically <0.2% SMPTE
  • Dynamic Range:  >114 dB, unweighted
  • Interchannel Crosstalk:  <-95dB, 20Hz to 20kHz
  • CMRR:  >40dB, typically >55dB at 1kHz
  • Stereo Coupling:  True RMS Power Summing™
  • Power Consumption:  15 Watts Maximum
  • Operating Voltage:  100VAC 50/60Hz; 120VAC 60Hz; 230VAC 50/60Hz
  • Operating Temperature:  0°C to 45°C (32°F to 113°F)
  • Dimensions:  1.75" x 5.75" x 19" (4.45 x 14.6 x 48.26 cm)
  • Unit Weight:  4.84 lbs (2.19 kg)
  • Reference:  0dBu =0.775Vrms
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