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55.000 products
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Parametric 500-Series EQ module with the legendary Harrison sound
The Harrison MR3eq brings one of the most iconic equaliser designs of the 1980s to a modern API-500 format. Inspired by the legendary Harrison MR3 mixing console, this equaliser module delivers precisely the musical, analogue character that shaped countless classic productions. The sound isn’t simply clean or precise; it possesses precisely that blend of warmth, presence and musical depth that makes Harrison so sought-after to this day.
Whether during recording, in the mix or when shaping the sound of individual tracks: the MR3eq is just as well-suited to subtle corrections as it is to broad, characterful adjustments. This makes it ideal for vocals, drums, guitars, synths, basses and practically any other signal that needs more contour, focus or analogue elegance in the mix.
For decades, Harrison has been synonymous with ‘beautiful analogue tone’.
Albums by artists such as Michael Jackson, ABBA, Led Zeppelin, Queen and Donald Fagen were produced on Harrison consoles. The MR3’s parametric equalisation in particular was one of the reasons why this console established itself so quickly in major studios and amongst renowned producers.
With the MR3eq, you get precisely this sonic aesthetic in a compact module that integrates seamlessly into existing 500-series setups. This makes it particularly appealing to engineers and producers who want to combine classic console character with modern modularity.
At the heart of the module is a parametric 3-band EQ with ±10 dB boost/cut. The frequency response is tuned to allow for both surgical corrections and broad, musical shaping. Rather than sounding sterile, the EQ interacts with the signal in a pleasantly organic way, refining the sound without over-processing it.
It is particularly in productions where the focus is not merely on technical correction but on genuine sound that the MR3eq really comes into its own.
The treble band covers a range from 800 Hz to 15 kHz and operates at 6 dB per octave. A particularly exciting feature is the ability to switch between shelf and bell characteristics. This allows the EQ to be flexibly adapted to different sources.
This is incredibly useful for airy vocals, silky overheads or adding a bit more presence to acoustic guitars, as you can adjust the EQ’s response to be either broad and open or more targeted, depending on the source material.
The midrange band operates from 400 Hz to 8 kHz and features a tunable filter Q. This makes the MR3eq suitable both for the targeted removal of unpleasant resonances and for musically bringing out important elements of the signal.
Particularly with vocals, snare drums, guitars or synth pads, this band helps you make the sound either more focused or more spacious, without the processing sounding artificial.
A real highlight is the high-pass filter with a 2 dB resonance peak. This is no ordinary low-cut filter, but a tool with character. When cutting low frequencies, this often preserves a little more musical energy in the signal, rather than simply making the source sound thinner.
Particularly on vocals, guitars or overheads, this can create a clean yet lively sound.
For quick workflow in everyday studio use, the MR3eq features separate bypass switches for the EQ and HPF. This lets you hear immediately just how much your settings are actually affecting the signal. An input overload LED also helps you keep an eye on the level and ensure the module is operating cleanly.
This makes the MR3eq not only sonically appealing, but also practical for everyday use.
The appeal of many classic Harrison circuits lies in the fact that they do not merely alter frequencies, but shape signals musically. This is precisely why Harrison EQs often sound richer, rounder and more natural than many modern, highly technical alternatives. The MR3eq is therefore not a dry correction tool, but rather a means of shaping sound with genuine studio DNA.
Harrison MR3eq
