Great River Harrison 32EQ
A console legend squeezed into a single 500 Series slot - if you can live with the learning curve.
Overview
The Harrison 32EQ by Great River is a collaboration between Harrison and Great River. It exists for one reason: to update the 32 Series console four-band EQ plus filters in one 500 Series space. Engineers speak about the Harrison 32 console in hushed tones. Great River built its reputation on high-quality, solidly built products, with the MP-2NV two-channel microphone preamp as its flagship, and it took on the job of putting that EQ into a module you can drop into a lunchbox. Mix (July 2014, p.61) called the 32EQ and the companion PWM-501 "500 Series processors with a learning curve," which is a fair warning.
Per Great River's own product copy, the module delivers the four-band EQ and the filters from the 32 Series console, condensed. The marketing materials also call it a "perfect replica of the famed Harrison 32 Console EQ." Every reissue makes a claim like that. Whether it survives a null test is a question for the bench. The collaboration with Harrison itself is the detail that separates this from a clone built off schematics and guesswork, and it makes the module a Harrison-sanctioned translation rather than a third-party copy.
Take the "learning curve" note from Mix seriously. A console EQ lifted out of a large-format desk and repackaged as a 500 Series module doesn't behave like a plug-in with labeled frequency detents and a nice graph. Engineers who've spent time with console-derived EQs know the drill: the controls interact, the gain staging matters, and the bands don't always land where a modern user expects. In the same review, Tim Dolbear described reaching for the 32EQ on toms and finding them sweetened faster than with his favorite plug-in EQ. He also noted the snare sounding better with a boost. Those are session-level observations, not bench measurements.
A single credit in a mic locker list isn't a verdict. But it was an ambience mic, not the obvious close-mic spot, which suggests an engineer trusting the EQ to shape a picture rather than fix a problem.
Here's the part that matters most for anyone shopping today. The verified documentation for this module is thin. No frequency response figures, no band centers, no filter slopes, no transformer details, no dimensions, no weight, no original price, and no production years appear in the available record. The product copy establishes what the 32EQ is and what it's derived from. It does not establish how it measures. Treat any spec sheet floating around online with suspicion until it can be traced to Harrison or Great River directly, because the manufacturer's own promotional text doesn't provide one.
What the record does support is the module's identity and its lineage claim. The 32EQ is a Harrison-blessed 500 Series extraction of a console EQ, a category where buyers pay for provenance as much as for circuit. The collaboration credit is the provenance. The "learning curve" is the tax. With almost no published specifications, a serious buyer is better off going to the bench or to a dealer with a return policy than to a spec-comparison spreadsheet.
For Great River, the 32EQ sits alongside the MP-2 preamp as part of a small, deliberately curated line rather than a sprawling catalog — a company that built its name on preamps extending into EQ with a licensed classic rather than an original design. Whether that's a strength or a limitation depends on what you want from a 500 Series slot. What it isn't is a mystery box: the module's purpose, parentage, and general character are all on the record. Its numbers are not.
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