dbx 166XL COMPRESSOR / GATE | PROFESSIONAL PRODUCTS |
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INTRODUCTION
Congratulations on choosing the dbx 166XL Compressor / Gate. The 166XL provides two channels of noise gating, OverEasy¨ or classic hard knee compression and PeakStop¨ limiting to give complete control of signal dynamics to stu- dios, sound reinforcement companies, musicians, or anyone who needs quality processing quickly and easily. We recom- mend that you take a moment and read through the manual as it provides information that will assist you in using your unit to its fullest potential. Features Include:
¥Stereo or Dual Mono operation of gating, compression and peak limiting.
¥OverEasy¨/Hard Knee Selection - allows selection between our famous OverEasy compression curve and the classic ÒHard KneeÓ curve popularized by the original dbx 160, 161 and 162.
¥Expander/Gate Circuit - with variable release time and +15dBu maximum threshold.
¥Selectable Low Frequency Shelf (via Contour button) in the Sidechain Path - recommended when compressing mixed program material to prevent low frequency energy from Òpunching holesÓ in the sound.
¥PeakStop¨ Limiting - provides control of maximum peak levels at the output of the 166XL regardless of any other control. PeakStop comes after the compression, gating and other circuitry including the output gain, so it sets an absolute limit for peak excursions before they reach the output.
¥True RMS Level Detection - senses the power in the program in a musical manner, much as human hearing does, giv- ing results superior to peak or average detection.
¥Hardwire System Bypass Buttons on both channels - allow the audio to pass even if the unit is unplugged, and are also useful for comparing the processed and unprocessed signals.
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¥Electronically Balanced XLR and 1/4Ó TRS Input and Output Jacks
¥Separate Sidechain Inserts - enables an outboard processor or signal to control compression or gating.
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INSPECTION
Verify that the 166XL package contains the following:
¥166XL Unit
¥AC Power Cord
¥Operation Manual
¥Registration Card
OPERATING CONTROLS
Front Panel
GAIN REDUCTION (dB)
BELOW ABOVE | BELOW ABOVE | 30 25 20 15 12 10 8 6 4 2 | ABOVE |
CHANNEL ONE
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| 0 | 2:1 |
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| 0 |
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| +10 |
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| 1.3:1 | 4:1 |
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| +10 | +5 | +15 | ||||||
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| +10 |
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| Stereo | ||
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| SC Enable |
| Contour |
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| OverEasy |
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| Auto |
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| Bypass |
| Couple | |
OFF | dBu +15 | Fast | Slow | dBu | +20 | 1:1 | :1 | Fast | Slow | Fast | Slow | dB | +20 |
| 0 | dBu +20 |
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THRESHOLD | RELEASE | THRESHOLD | RATIO |
| ATTACK | RELEASE | OUTPUT GAIN |
| PEAKSTOP | MASTER | |||||||||
| EXPANDER/GATE |
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| COMPRESSOR |
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| LIMITER | ||||
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EXPANDER/GATE Section
Expander/Gate THRESHOLD Control and LEDs (BELOW/ABOVE):
Adjusting this control sets the level at which the gate will open and allow the signal at the input to pass through to the output. Turning the knob fully counterclockwise (to OFF) allows the gate to pass signals unattenuated, effectively bypass- ing the gate. Turning the knob fully clockwise causes the gate to attenuate input signals below +15dBu.
The two Expander/Gate LEDs indicate the relationship of the input signal level to the threshold setting. The red LED lights when the signal is BELOW threshold, the green LED lights when the signal is ABOVE threshold.
Note: The 166XL’s expander/gate attack rate (which controls how fast the signal is restored after being attenuated) is internally set to be very fast - fast enough to allow all of the transient at the beginning of a note, vocal or spoken word to come through.