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M. Zähl EQ1 500 Stereo-EQ
The M. Zähl EQ1 500 Stereo-EQ is a high-end fully analog 4-band stereo equalizer in API 500 format, based on the legendary circuitry of the Zähl AM1 studio console. Designed for demanding recording, mixing, and summing applications, it delivers outstanding sound quality and flexibility in a compact module.
Its discrete analog design features proportional-Q behavior, meaning the bandwidth becomes narrower as gain is increased—allowing both musical shaping and precise corrections. Each band offers multiple selectable frequencies and a gain range of ±12 dB, providing a wide range of tonal control.
The EQ’s flexibility is further enhanced by switchable filter types: high and low bands can operate as shelving or bell filters, while the mid bands feature different tonal characteristics for varied sonic textures.
Sound Character
The EQ1 500 delivers highly musical, natural, and precise equalization. Boosts sound smooth and organic, blending seamlessly into the mix without harshness.
Low frequencies can be shaped with punch and control, while the midrange offers versatile tonal sculpting—from subtle presence adjustments to corrective EQ. High frequencies remain clear and open without becoming brittle.
Thanks to its varied filter characteristics, the EQ is equally suited for surgical tasks and creative sound shaping.
Highlights
✔ 4-band stereo equalizer in API 500 format
✔ based on the Zähl AM1 high-end console design
✔ fully discrete analog signal path
✔ proportional-Q behavior for musical EQ response
✔ ±12 dB gain per band
✔ 7 selectable frequencies per band
✔ switchable high and low bands (shelf / bell)
✔ varied filter characteristics for tonal flexibility
✔ hard bypass for transparent signal path
✔ ideal for recording, mixing, and summing
Typical Applications
✔ precise EQ for vocals and instruments
✔ shaping drums, bass, and guitars
✔ stereo bus and summing processing
✔ tracking EQ during recording
✔ versatile all-purpose EQ in 500-series racks
Technical Specifications
✔ device type: stereo equalizer
✔ format: API 500 series
✔ bands: 4 fully switchable EQ bands
✔ frequency selection: 7 frequencies per band
✔ gain: ±12 dB per band
✔ filter behavior: proportional Q
✔ circuit: discrete (API 2520 op-amp based)
Hersteller:
Zähl Elektronik-Tontechnik
Michael Zähl
Am Stadion 18-24
51465 Bergisch Gladbach
Germany
info@zaehl.com
https://zaehl.com
Sicherheits- und Warnhinweise:
Spezifische Sicherheitshinweise, die für das Produkt gelten, sind in der Bedienungsanleitung des Produkts zu finden.