{"product_id":"empirical-labs-elds-h-derresser","title":"Empirical Labs ELDS-H DerrEsser","description":"\u003cdiv lang=\"en\"\u003e\n\u003cstrong\u003eEmpirical Labs ELDS-H DerrEsser\u003c\/strong\u003e — a horizontal 500 series module, a multi-function dynamic filter working as a level-insensitive de-esser and a high-frequency limiter.\n\n\u003cp\u003eDerrEsser was Empirical Labs' first product in the API 500 format — the circuit splits the signal into low and high frequency ranges using a crossover technique, then uses a voltage-controlled amplifier (VCA) to turn down excess high frequencies in a way described as unusually musical. Unlike typical de-essers, the same circuit can be used four different ways, switched via buttons on the front panel.\u003c\/p\u003e\n\n\u003ch3\u003eA de-esser that doesn't care about overall level\u003c\/h3\u003e\n\u003cp\u003eIn DS mode, the trigger threshold doesn't depend on absolute signal level — the circuit compares the amount of high-frequency content to low-frequency content, so raising or lowering the overall level of the chain doesn't throw the setting off. That solves a classic de-esser problem: a threshold dialed in for a loud chorus either misses sibilants in a quieter verse or over-reacts on a loud passage. Here, it's set once and forgotten, because the detector tracks the relationship between bands rather than raw amplitude.\u003c\/p\u003e\n\n\u003ch3\u003eOne unit, four different tools\u003c\/h3\u003e\n\u003cp\u003eIn HF Limit mode, the same circuit works as a high-frequency compressor — level sensitive, but weighted heavily toward high content, delivering general top-end smoothing rather than targeted sibilant control. The Listen function combined with the HP\/LP switch lets you actually audition what the dynamics circuit is doing: with the high-pass filter engaged you hear exactly the high frequencies the VCA is controlling, and with the low-pass filter (12dB\/octave) you hear only the low end the dynamics never touch. That lets an engineer diagnose which band the problem actually lives in before committing to a threshold setting — something no de-esser without a sidechain-listen function can offer.\u003c\/p\u003e\n\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFour operating modes: de-esser (DS), HF limiter, high-pass listen, low-pass listen\u003c\/li\u003e\n\u003cli\u003eLevel-insensitive DS threshold based on the ratio of high to low frequency content\u003c\/li\u003e\n\u003cli\u003eVCA technology selected for glitch-free, distortion-free, noise-free performance\u003c\/li\u003e\n\u003cli\u003eAdjustable crossover frequency (Frequency knob)\u003c\/li\u003e\n\u003cli\u003e12dB\/octave low-pass filter in listen mode\u003c\/li\u003e\n\u003cli\u003eBad-Clip indicator monitoring several circuit sections simultaneously (1dB threshold)\u003c\/li\u003e\n\u003cli\u003eTrue bypass\u003c\/li\u003e\n\u003cli\u003eAPI 500 format, horizontal orientation\u003c\/li\u003e\n\u003cli\u003eHand-built and calibrated in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFrequency response: 3Hz-120kHz (-3dB points)\u003c\/li\u003e\n\u003cli\u003eDynamic range: 115dB (from maximum output at 0.5% THD to minimum output)\u003c\/li\u003e\n\u003cli\u003eTransformerless noise floor: typically -93dBu\u003c\/li\u003e\n\u003cli\u003eDistortion: 0.0035% to 0.01% depending on mode and settings\u003c\/li\u003e\n\u003cli\u003eBalanced input, single-ended output with balanced impedance, pin 2 hot\u003c\/li\u003e\n\u003cli\u003eInput impedance: 20k Ohms, output impedance: less than 51 Ohms\u003c\/li\u003e\n\u003cli\u003eDS time constants: attack under 1ms, fixed release 0.04s\u003c\/li\u003e\n\u003cli\u003ePower consumption: 8W max, 4W typical\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Empirical Labs","offers":[{"title":"Default Title","offer_id":54195509592401,"sku":"38062","price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8741\/0769\/files\/EmpiricalLabsELDS-HDerrEsser1.jpg?v=1783607661","url":"https:\/\/wrdtunes.com\/en-fr\/products\/empirical-labs-elds-h-derresser","provider":"Wired Tunes","version":"1.0","type":"link"}