EMPIRICAL LABS DerrEsser EL-DS DUO 500-Series Dynamic High-Frequency Fixer (Horizontal Pair in EL500 Rack)

EMPIRICAL LABS DerrEsser EL-DS DUO 500-Series Dynamic High-Frequency Fixer (Horizontal Pair in EL500 Rack)

EMPIRICAL LABS DerrEsser EL-DS DUO 500-Series Dynamic High-Frequency Fixer (Horizontal Pair in EL500 Rack)

B&H # EMDSDUO MFR # DS DUO
EMPIRICAL LABS DerrEsser EL-DS DUO 500-Series Dynamic High-Frequency Fixer (Horizontal Pair in EL500 Rack)

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Important Notice: This item is non-cancelable and non-returnable
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Expected availability: 7-14 business days 
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Product Highlights

  • High-Performance Desser
  • High-Frequency Limiting
  • Hard-Clip Indiator
  • True Bypass
  • Military-Grade Switches and Relays
  • EL500 Rack w/ Super Quiet 16V Supply
  • 48V Phantom Supply w/ 35mA of Current
  • Stereo Link Switch
  • Built-In Instrument Input D.I.
  • Hand-Built and Calibrated in the USA
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Options: Horizontal Pair in EL500 Rack

Horizontal Pair in EL500 Rack Horizontal Version

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Vertical Version

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in EL500 Rack

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  • 1Description
The DerrEsser EL-DS DUO from Empirical Labs is a horizontal pair of multi-function dynamic filtering devices preinstalled in the EL500 rack. In its basic DS mode, it is an effective, level-insensitive de-esser, a device that will adjust the high-frequency gain on overly treble-y or spiky vocals or other sources in an extremely musical manner. However, unlike other de-essers, the device allows for multiple uses of its circuitry. As a de-esser in the DS mode (HF Limit OFF), the threshold can be set to tame harsh S's (sibilants) that result from an overly bright singer or from EQ'ing to make a vocal sound aggressive and clear. The DS threshold is not level dependant, and compares the amount of high-frequency content to the low-frequency content, so adjusting the overall level does not affect the threshold. It features VCA technology for glitch-free, distortion-free, and noise-free performance. The corner frequency is user adjustable with a high-performance active crossover.

In HF Limit mode, the DerrEsser essentially acts as a high-frequency compressor. If there is enough high-frequency content to exceed the threshold, then gain reduction occurs. It is level sensitive, but responds much more to high frequencies. This mode is more of a general high-frequency smoothing device. In high-pass mode and while using the LISTEN function, the user can employ the filter circuitry inside the DerrEsser to process their audio. With the LISTEN button in, and the HP/LP switch out, the user will be hearing the high frequencies that are being controlled with the dynamic/compression circuits. The corner frequency is adjustable with the frequency knob. In low-pass mode and with the LISTEN button in, and the HP/LP button in, the user is now listening to the low frequencies, those not affected by the VCA and dynamic/compression circuits. This is a 12 dB-per-octave filter whose corner frequency can again be adjusted with the frequency knob.

The EL500 rack features a quiet power supply and offers both XLR and phone rear-panel inputs and outputs. In addition, a 1/4" instrument preamp/direct box input is provided on the front panel, which will automatically switch the left 500 module's input to this front phone jack once something is plugged into it. Switches to link compressors and engage a 48V phantom supply are also provided.
  • High-frequency limiting with a tailored soft knee. The Dynamic Section can be used for de-essing or smooth high-frequency softening
  • Hard-Clip Indicator Light: This Bad-Clip LED indicates when the sound level is within 1 dB of hard clipping and monitors several sections within the DerrEsser for possible clipping
  • Unity Gain: 6 dB of gain on inputs and outputs available
  • API-500 Series rack compatible
  • True bypass
  • Military-grade switches and relays
  • EL500 Rack
    • Flush-mount system
    • Quiet 16V supplies
    • More than 280 mA available on both supplies
    • 48V phantom supply, 35 mA of current
    • Link switch to stereo link two compressors
    • Auto-sense on Inst In jack with less than .0006% THD
    • XLR and phone-plug inputs and outputs
UPC: 855013006071
In the Box
EMPIRICAL LABS DerrEsser EL-DS DUO 500-Series Dynamic High-Frequency Fixer (Horizontal Pair in EL500 Rack)
  • Power Cord
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description
    Frequency Response 3 Hz to 120 kHz (-3 dB points)
    Dynamic Range -115 dB from maximum output (0.5% THD soft clipping) to minimum output, noise floor typically -93 dBu
    Distortion Range 0.0035 and .01%
    Outputs DC coupled
    Input Impedance 20 kohms
    Output Impedance 51 ohms
    Attack Time < 1 ms
    Release Time 0.04 seconds, fixed internally
    Power Consumption Typical: 4 W
    Maximum: 8 W

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