Gyraf Audio G23-S Stereo Tilting Equalizer - Used From Gyraf

Tube & Solid-State (Dual Signal Path) Stereo Tilting Equalizer. In Used, Mint condition

Buy Pre-owned from Sound Pure with Absolute Confidence

Sound Pure's dedication to pre-owned products is unprecedented in the industry. We are a small team of dedicated experts that buys, trades, and consigns. We are trusted by customers all over the world. Our curated collection, is thoroughly tested and inspected by some of the best in the business. Our inventory is constantly changing, ever-evolving, with some items sold before reaching the website. Looking for something specific? Have questions about this product's condition or history? Want more photos, or to simply chat with an expert who's had his hands on this actual piece? Contact us now.

Our Current Used/Vintage Collection »

Sound Pure's Consignment Program »

Luthier Certification for Used Instruments »

"Gone, Baby, Gone"

This one is sold. Don't miss the next one. Some things never even make it to the site so stay up to date on our used collection.

We get in many oddities, rare and vintage products, most of which go fast. If you're on the hunt for something specific, something unique, or something priced right, let us notify you on our used collection before the items even hit the site.

Want to know if one lands?

Notify Me

Want to discuss what's coming?

Call Us! Toll Free! 888-528-9703
Local / International (+1) 919-682-5552

Talk with a Specialist

What We Think

When a mix or master is 95% of the way there, standard parametric equalizers can sometimes feel too surgical or introduce obvious phase distortion that strips away cohesion. The Gyraf Audio G23-S was designed specifically for those critical finishing touches, offering one of the most elegant, unobtrusive tone-shaping topologies in high-end pro audio.

At the heart of the G23-S is its revolutionary 1dB/octave linear tilt filter. Unlike traditional tilt EQs that pivot around a single cutoff frequency—often creating localized phase shifts—the G23-S spreads group delay across eight full octaves. Turning the tilt control creates an almost ruler-straight response curve that naturally darkens or brightens an entire track or mix bus without making it sound "equalized". To fine-tune the extremes, Gyraf added a subtle 3-band Baxandall tone control (shelving Lows and Highs, wide-Q Bell Mids) with three selectable frequencies per band.

What makes the "-S" version an absolute powerhouse in modern hybrid studios is its Dual-Technology architecture. With a flip of a switch, you can toggle between a classic tube/transformer circuit—driven by E88CC/6922 tubes and custom Lundahl transformers for rich analog depth—or a ultra-clean, high-speed solid-state driver with active servo-balancing. It essentially gives you two distinct processing personalities in a single 2U chassis.

Want More Great Content?

Manufacturer's Description from Gyraf

The Gyraf Audio G23-S stereo tilt equalizer is an original idea of ours – the first ever equalizer based on fully linear one db/oct filters. The way we implement filtering allows for very gentle overall tonal corrections without losing much subjective phase coherence or mix integrity. All-tube signal path, or modern solid-state technology, accessible with the flip of a switch.

The G23-S is an updated version of Gyraf Audio G23 – now including an option for selection between all-solid-state technology or classic tube circuitry. Gyraf Audio added an additional step to the bypass switch - marked "S" - which instantly shifts you into solid-state land: Inputs become differential instrumentation type in stead of transformer, active equalizer stage gets controlled by a state-of-the-art opamp, and output stage gets servo-balanced in stead of tube/transformer drive.

What sets it apart from all other EQ designs is that Gyraf Audio designed it around a highly linear 1dB/oct slope filter, so that rotating the control will adjust an almost ruler-straight response curve, to a maximum steepness of 1dB/Oct. So what you acheive in the 1dB/Oct function is to "spread out" or distribute the "needed" phase roll across the whole spectrum, meaning that at any given interval, only minute amounts of group delay is apparent. In total, it allows quite some correction without sounding "Eq'ed". And because you'd occasionally want to correct outer ends of spectrum, they have added a gentle Baxandall tone control, shelving lows and highs, wide-Q bell mid, each at three selectable frequencies, that they spent quite some time optimizing.

FEATURES:

Mainly for mix and mastering
Option for selection between all-solid-state technology or classic tube circuitry
Designed around a highly linear 1 dB/oct slope filter
Gentleness and subtlety are G23-S design targets