Most compressor/gates provide less than musical compression, coupled with gating that swallows transients—or closes early, cutting off decay and reverb tails. The superb engineering in the 166XL ensures that both its compression and gating provide versatility and excellent sonic performance in situations where other compressor/gates typically produce undesirable processing artifacts.
When using the 166XL’s Attack and Release controls, artists and engineers will find that the center settings deliver classic dbx compression, while the full control range produces voicings that extend from slow “leveling” to aggressive “peak” limiting.The 166XL’s advanced gate circuitry uses a completely new, program-dependent timing algorithm to produce ultra-smooth release characteristics—even with complex signals, such as voice or reverb decays. dbx engineers went on to take advantage of the wide dynamic range and high precision of the dbx V1 VCA to design in an extra-wide threshold range and ensure top gating performance for each application.
Separate precision LED displays for gain reduction, compression threshold and gate threshold allow quick, accurate setup, while the 166XL’s intuitive operation lets users easily smooth uneven levels, add sustain to guitars, squash drums or tighten up mixes. In Stereo couple mode, the Channel 1 controls become Master controls, and Channel 2 follows precisely to ensure a rock solid stereo image—even with high amounts of compression, through True RMS Power Summing™. Professionals and newcomers alike will find that the 166XL sets up rapidly and musically the first time it is used, especially with the Auto attack and release function. Advanced applications are now easy, with the 166XL’s full sidechain functionality, and the ability to use either hard knee or OverEasy® compression algorithms. Add to this already impressive list of features the venerable PeakStop™ limiter, and you’ve got a strong finisher, every time.

Specifications
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 60dB
Expander/Gate Attack Time
115 dB
Stereo Coupling
True RMS Power Summing™
Power Consumption
15 Watts Maximum
Operating Temperature
0°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