4.7/5 stars (1218 reviews) • Effects / Compressor

Product Summary

SSL needs no introduction in the compressor world. Their hardware has been shaping records for decades, and X-Comp is their attempt to bottle that same professional-grade compression into a single, deeply flexible plug-in — one that doesn’t just emulate one famous box, but gives you the tools to dial in a wide range of classic and modern compression characters.

At its heart, X-Comp is a sophisticated stereo compressor built to mastering-grade audio fidelity standards. It’s designed to cover the full spectrum of compression work — from barely-there, transparent dynamic control during mastering, all the way to hard-hitting, energy-loaded brickwall limiting that SSL explicitly compares to the character of their legendary Listen Mic Compressor. That’s a wide operating range, and it’s deliberate.

What makes X-Comp stand out technically is its dual symmetrical knee design. Most compressors give you a single knee — the point where compression starts kicking in — and you adjust its hardness. X-Comp gives you two, letting you shape the onset and release of compression with a level of detail that simply isn’t possible with a single-knee design. This is particularly useful when you need compression to feel musical rather than mechanical.

The plug-in doesn’t model one specific vintage compressor circuit. Instead, SSL built a parameter set flexible enough to reproduce the sonic characteristics of multiple classic compressor types, including OPTO, FET, and Vari Mu designs. You’re working from a toolkit rather than a snapshot, which makes X-Comp substantially more adaptable across different mixing and mastering scenarios.

The advanced sidechain architecture extends that flexibility further. It supports ducking, pumping, and de-essing workflows — meaning you can feed a trigger signal into the compressor to respond to specific elements of the mix rather than just the overall level. Combined with MIDI compatibility for real-time parameter manipulation, X-Comp is built for both static studio use and live or dynamic production environments.

The interface is designed around click-and-drag controls, keeping the workflow direct and tactile without burying key functions in menus.

Key Features

Processing

• Mastering-grade audio fidelity — delivers the transparency and precision required for both mixing and mastering work
• Dual symmetrical knee design — independently shape the onset and character of compression for detailed, musical results
• Flexible compression styles — covers classic OPTO, FET, and Vari Mu characteristics as well as modern approaches, from subtle dynamic shaping to brickwall limiting

Control

• Advanced sidechain architecture — supports ducking, pumping, and de-essing with internal or external sidechain signal routing
• MIDI compatibility — real-time parameter manipulation via MIDI for dynamic production workflows

Visual / Workflow

• Intuitive click-and-drag interface — direct, tactile control without menu-heavy navigation
• Authorisation via a free iLok account — no physical iLok hardware dongle required

System Compatibility

Mac

• macOS 11 Big Sur – macOS 13 Ventura (64-bit only)
• Apple M1 supported (native)
• Intel Dual-Core, 2.4GHz or higher
• 4 GB RAM minimum / 8 GB recommended
• Formats: AU, VST2, VST3, AAX Native

Windows

• Windows 10 – Windows 11 (64-bit only)
• Intel Core 2 or comparable, 2.4GHz or higher
• 4 GB RAM minimum / 8 GB recommended
• Formats: VST2, VST3, AAX Native

Note: A free iLok Account is required for licence authorisation. No physical iLok dongle needed.