Gyraf SSL/GSSL Bus Compressor PCB Set

Bring classic SSL mix “glue” into your rack with this DIY-friendly PCB set, designed to recreate the legendary G‑Series Bus Compressor in a compact 1U format.

Product overview

This PCB kit lets you build your own stereo bus compressor inspired by the classic SSL G‑Series design, renowned for its smooth, transparent compression and the unmistakable glue it adds to mixes and program material. The layout closely follows the original circuit so you can capture the tone and response of the well-loved hardware unit in a modern DIY build.

Features

– Complete PCB set: Includes the main audio PCB and control PCB, laid out to fit a standard 1U 19″ rack enclosure.
– Silkscreened component placements: Clear labels on the board make population, inspection, and troubleshooting much easier.
– Proven Gyraf-style GSSL topology: Based on a widely respected DIY implementation of the SSL bus compressor circuit.
– Online build documentation: Access guides and documentation for parts sourcing and step‑by‑step assembly in the Documentation tab and via the Gyraf Audio DIY SSL Compressor resources.
– Flexible parts choice: No components are included, giving you full control over component brands, grades, and cost.

What’s included

– Rev.7 main PCB
– Rev.7 control PCB

What you’ll need

To complete the project, you will need to supply your own:

– Electronic components (ICs, resistors, capacitors, switches, connectors, etc.)
– Chassis/enclosure (1U 19″ recommended)
– Knobs and front‑panel hardware
– Power supply

This kit is aimed at builders with some prior experience in electronics assembly and soldering.

Additional notes

– A separate gain reduction meter for this build is available for purchase.
– Detailed build docs and external resources (including the Gyraf Audio DIY SSL Compressor page) are linked in the Documentation section for deeper technical reference and community tips.
– Analog Classics does **not** provide individual build support for this project.