Buzz Audio REQ 2.2 Resonance EQ

  • 1900.00 £
  • Published date: April 21, 2024
    • Hadley Wood, Hertfordshire, United Kingdom

Buzz Audio REQ 2.2 Resonance EQ

⭕ Buzz Audio REQ 2.2 Resonance EQ with Elma stepped attenuator upgrade

Used but in perfect condition with Org. Manuals and boxes.

This is a great mastering EQ and comes with manual and original boxes (this was the 8K upgraded model with only 1 owner in a smoke free studio). Here is a description from online:

REQ-2.2 resonance equalizer

The REQ-2.2 is a high end 4 band Parametric Equalizer like no other. Real inductor resonant circuits are coupled with our True Class A discrete amplifiers to present the most glorious sounding EQ. Unlike other inductor based equalisers, the REQ-2.2 has fully adjustable Bandwidth and 72 Frequency choices per channel. In addition, we have included a transformer based variable Saturation circuit which provides a hint of vintage analog warmth to the sound.

The stereo REQ is available in two versions. The Recording version uses quality Alps variable pots for the cut/boost controls and offers +/-16dB of range. The Mastering version uses light to the touch 23 position Elma switches for the cut/boost controls with +/- 8dB range. It also has a different High Pass Filter section more suited to mastering. All other controls in both version are switched. The REQ-2.2 is truly a unique product with exacting attention to circuit design and build quality.


The Low and High bands can be switched between bell curve or shelving curve. In shelf mode the Bandwidth control converts to a shelf Slope control allowing the user to vary the steepness of the shelf curve. The Low and High Mid bands feature two frequency ranges to cover a large range of choices. All bands have their own Bypass switch as does the Saturation and High Pass Filter sections.


Frequency Response measured with all eq bands on and set flat, Saturation and HPF off;
5Hz to 125kHz +0.2/-3dB

Harmonic Distortion at +10dBu signal level;
Saturation OFF; 100Hz 0.007%...1kHz 0.004%...10kHz 0.007%...100kHz 0.013%
Saturation ON POS-1 20Hz 1.5%...100Hz 0.07%...1kHz and up 0.01%
Saturation ON POS-2 20Hz 1.5%...100Hz 0.14%...1kHz and up 0.01%
Saturation ON POS-3 20Hz 1.5%...100Hz 0.16%...1kHz and up 0.01%
Saturation ON POS-4 20Hz 1.6%...100Hz 0.17%...1kHz and up 0.01%
Saturation ON POS-5 20Hz 1.7%...100Hz 0.18%...1kHz and up 0.01%
Saturation ON POS-6 20Hz 2.0%...100Hz 0.22%...1kHz and up 0.01%

Maximum Input Level; +25dBu
Input Impedance approx 20k ohms

Maximum Output Level; +32dBu balanced
Output Impedance; approx 70 ohms

Input Common Mode Rejection; (ref 0dBu) 100Hz -65dB. . .1kHz -65dB. . .10kHz -60dB

Noise; all bands ON set flat -110dB below max input level (A weighted)

Power requirements; 115V/230V selectable on rear panel
Dimensions; 4U rack mount, 300mm deep

0dBu = 0.775V RMS in these specifications.
Specification are typical of a production unit, and subject to change if we improve something.

Phone number ✆ 01923 425121

Hadley Wood, Hertfordshire

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