Gyraf G23-S

“Ambler” Tilt Equalizer with Solid-State Option

Description

The G23-S is an elaboration of our G23 Tilt-type Equalizer, where we added a selectable option for either a solid-state or tube audio path.

Like the standard G23, it’s aimed at the situations where you have a mix that is already nearly-perfect balanced, but you want it a tad darker or brighter without messing up the overall definition. This unique tilt equalizer works by distributing the uneven phase response associated with filtering across the whole audio spectrum instead of having it all within one octave like on ordinary first-order tilt filters.

The G23-S is as standard available as 230V or 115V mains voltages – Please specify when ordering.

Changes
The Gyraf Audio 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 instead of transformer, active equalizer stage gets controlled by a state-of-the-art opamp, and output stage gets servo-balanced instead of tube/transformer drive.

Tech
Designed around a highly linear 1dB/oct slope filter, so that rotating the tilt control will tilt an almost ruler-straight response curve, to a maximum steepness of 1dB/Oct. What sets it apart from all other tilt EQ designs is that Gyraf Audio designed it around a highly linear 1dB/oct slope filter so that rotating the tilt control will tilt an almost ruler-straight response curve, to a maximum steepness of 1dB/Oct. So what you achieve in the 1dB/Oct tilt 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 the 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.

Design
Gentleness and subtlety were main design targets here: Nothing anywhere near surgical: Tilt and Highs at +/-4dB, mids at +/-2dB, and lows at +/-6.5dB.

Gyraf Audio G23-S Equalizer Features
A Tilt-type Equalizer aimed mainly at mix and mastering
Option for selection between all-solid-state technology or classic tube circuitry
Designed around a highly linear 1dB/oct slope filter
Gentleness and subtlety are G23-S design targets

Gyraf Audio G23-S Equalizer Specifications
Topology: Pure Class-A
Inputs: Floating, Transformer Balanced
Input Impedance: 10K Ohm “Bridging” Type, 24K Ohm Servo-Balanced
Input/Output Connectors: Standard XLR Jacks, Pin 2 Hot
Outputs: Floating, Transformer Balanced
Source Impedance: < 500 Ohms, Servo-Balanced at < 50 Ohm
Optimum Operating Levels: Around +4dBu
Operating Voltages: 220-230V AC, 35W, US Version; 110-120VAC
Mains Fuse: 630mA Slow-Blow Type, US Version; 630mA Slow-blow (“T”) Type

Gyraf Audio G23-S Equalizer Includes
Gyraf Audio G23-S Equalizer
Power Cord
4 x Rubber Feet
User Manual
2 Year Warranty

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