Gyraf Audio Gyratec 23-S - User Manual

Gyraf G23-S Tilting Equalizer
Gyraf Audio Gyratec 23-S "Ambler" Linear Tilting Equalizer.
Preliminary user manual, 17. May 2018. Edit May '20.
The Gyratec 23-S Tilting equalizer is a tone control based on a
somewhat different concept. Instead of going with standard 6dB/oct
"first order" filters with their inherent phase/group delay around
cutoff frequency, we approximate a 1dB/oct filter which
distributes the (necessary) phase clutter over eight octaves. This
results in a very unobtrusive response - even at extreme settings
the material will tend to stay in balance and subjectively sound
unprocessed.
On top of the tilting tone control, we have added a very-gentle
Baxandall tone control with shelving lows and highs and a bell
mid, each with three selectable corner frequencies.
Our interpretation of the the "Tilting" equalizer does not have
selectable corner or rotation frequencies, as the linear approach
makes this unnecessary.
The -S addition for the G23 designates an added solid-state
architecture – with the bypass switch in the “S” position, we
bypass the usual transformers and tubes, and wrap the tone control
circuits in servo-balanced active circuits instead. This for
situations where you need the enhanced cleanliness or huge drive
capabilities of solid-state.
In use:
First of all, when turning on the Eq, allow the unit to heat up
it's tube department for ten to fifteen minutes - to get the tubes
stabilised in their working temperature. The sound and operating
levels for the non-S setting will change slightly within this
period.
1

Summary

Gyratec G23-S Tilting Equalizer Overview

Unique Tone Control Concept

Explains the 1dB/oct filter approximation for unobtrusive phase response and Baxandall tone control.

In Use: Initial Warm-up and Controls

Guidance on heating the unit and understanding the main controls like Linear Tilting, Bypass, and Trim.

Technical Details and Safety Information

Unit Functionality and Technology

Details the dual-technology, input/output impedance, and circuit architecture of the unit.

Operating Levels and Audio Path

Guidance on optimal operating levels for DAW integration and the unit's audio path components.

Important Safety and Maintenance Notices

Critical warnings regarding high voltages, servicing, mounting, and tube life.

Power and Fuse Specifications

Details the unit's AC voltage, power consumption, and fuse type for different regions.

Regulatory Compliance Declaration

EU Declaration of Accordance

States the device's compliance with EMC and Low Voltage Directives.

Gyraf Audio Gyratec 23-S Specifications