DerrEsser ELDS-V 500 Series Multi-Function Dynamic Filtering Device
The DerrEsser Has Four Modes
DS MODE - (Bypass Button IN, all other buttons OUT). 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. Great care was taken to ensure this DS section meets the Empirical Labs reputation for originality and ease of use. We use the latest technology VCA, specially selected for glitch free, distortion free, and noise free performance. The time constants were carefully selected and the corner frequency is user adjustable with a high performance active crossover.
HF LIMIT - (Bypass Button IN, HF LIM IN, all other buttons OUT). In this mode, the DerrEsser essentially acts as 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, and is probably the first carefully tailored soft knee HF limiter in existence.
HIGHPASS - (Bypass Button IN, Listen IN, HP/LP OUT, HF LIM doesn’t matter). By using the “LISTEN” Function, the user can employ the superb 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 by the Frequency knob.
LOWPASS - (Bypass Button IN, Listen IN, HP/LP IN, HF LIM doesn’t matter). 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 by the Frequency knob.
“We were primarily interested in the DeEssing, but were
pleasantly surprised at the HF limiting. As it turns out, we’re using
them for the limiting way more than in De-Ess mode. Who’d have thunk?
Excellent job, man. The DerrEsser is an amazing new piece of gear. We
came for the De-essers, but stayed for the HF Limiter.”
- Bob Weston, Chicago Mastering Service
Specifications
• Freq. Response is 3 Hz to 120 kHz (-3dB points).
• Dynamic Range - 115 dB from maximum output (.5%THD soft
clipping) to minimum output. Transformerless noise floor typically –
93dBu.
• Distortion Ranges between .0035% and .01% depending on mode and settings.
• DC coupled Input and Outputs.
• High quality audio caps used internally.
• Input Balanced, Output single ended but with balanced impedance. Pin 2 hot.
• Input Impedance is 20k Ohm. Output impedance is less than 51 ohms.
• D-S Dynamics Time Constants - Attack time is less than 1mS. Release .04 sec, fixed internally.
• Power Consumption – 8 Watts max. 4 Watts Typical.
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