Mackie Quad EQ Graphic Equalizer

Mackie QUAD EQ

The Mackie Quad EQ Graphic Equalizer is part of a family of digital outboard gear based on our TT24 digital mixer engineering developments. We thought it would be good to share the love, not to mention the design and engineering expertise developed during the TT24 program.

The four-channel, 30-band graphic, Adaptive-Q equalizer has a user-friendly front panel, and a host of features that go beyond it’s simple appearance. The Quad EQ comes with its own measurement microphone, and has a built-in Sound Pressure Level (SPL) meter, and Real Time Analyzer (RTA) functions. These allow for simple viewing of filter settings vs. actual measurement.

The simplicity of the interface makes the unit easy to use for beginners, and fast enough for professional live sound engineers. The sound quality makes the Quad EQ lovely for the high-end user as well. The clever Adaptive-Q design allows the equalization to follow the settings of the 30 EQ filters, without the ripple and boosting effects of common EQ units. In other words, what you see in the display is what you get.

People are really attracted to sound engineers who know how to operate equipment with lots of flashing lights, so the Quad EQ was especially designed with plenty of lights in operation.


  • Four 30-band, Adaptive-Q graphic equalizers
  • Algorithms developed, tuned, and trained by Acuma Labs digital engineering group
  • Special EQ algorithm developed for accurate representation of EQ settings
  • Unique, easy to use front panel designed for intuitive live use
  • Measurement microphone included
  • Built-in pink noise generator
  • RTA of input signals or mic measurement signal
  • Simultaneous EQ and RTA display
  • Variable high-pass and low-pass filters for each channel
  • A, B, and C-weighted SPL meter
  • 99 snapshots for instant recall of settings
  • Stereo Linking of channels A and B, C and D
  • XLR and TRS I/O connections
  • 2RU rackmount, rugged and reliable design
  • “Planet Earth” power-supply operates on voltages between 100 and 240 VAC
  • Standard IEC power receptacle and power cord


Mackie QUAD EQ

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Mackie Quad EQ Graphic Equalizer Reviews

Have you owned this product? Let others know what you thought of it.


(1 Reviews)

Build Quality 90%
Sound Quality 95%
Usefullness 100%
Mojo/Funk 70%
Reliability 90%

What other owners say...

Why the hell did I sell it!

By Steve

Build Quality 90%
Sound Quality 95%
Usefullness 100%
Mojo/Funk 70%
Reliability 90%

I originally bought this for room correction in a home stereo system, it worked beautifully for that purpose, but I ended up selling it as I no longer needed it for that purpose, but I really regret letting it go. It was simple to use, had totally transparent sound quality even though incoming sounds were converted to digital, and the reverse on the way out etc. Build quality was really solid too. It was probably one of the last great Mackie products, I have to get me another!

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Released: 1982
Quantization: N/A
Sampling Frequency: N/A
Frequency Response: 20Hz-20kHz
Dynamic Range: >90dB
THD: Below 0.2%