Solid State Logic 729737X1 B-DYN Dynamic 500 Series Module

Classic SSL 4000 B-Series Dynamics in a 500 Series Module
The Solid State Logic B-DYN Dynamics Module brings the iconic sound of the SL 4000 B console’s compressor, limiter, and gate/expander to the 500 Series format. Modeled after the original channel dynamics circuit found in legendary studios such as Virgin’s Townhouse Studio, Le Studio, and Record Plant, this module delivers the warm, saturated compression and punchy dynamics that shaped countless hit records. Whether used on vocals, drums, or mix busses, the B-DYN offers an unmistakable sonic character with vintage SSL-style grab and tone.

Authentic Analog Compression with Classic SSL Character
This module captures the unique compression response of the original SL 4000 B-Series console. Featuring a feedback design with peak sensing, the B-DYN applies compression in a musical, organic way—perfect for adding weight and intensity to vocals, guitars, and percussive elements. Its signature grabby compression style, famously heard on Phil Collins’ "In the Air Tonight," makes it an excellent tool for tightening up drum tracks while maintaining punch and impact.

Built-In Expander and Gate for Dynamic Shaping
The B-DYN module integrates an expander/gate section that helps refine and control the dynamics of any signal. Whether used to tame unwanted noise, shape drum transients, or create rhythmic gating effects, this section provides flexible control with a smooth and natural response. The gating and expansion characteristics retain the warmth and musicality of the original SL 4000 B-Series, ensuring seamless integration into modern production workflows.

Side-Chain High-Pass Filter for Transparent Processing
A side-chain high-pass filter allows for precision control over how the compressor reacts to low frequencies. By filtering out unwanted bass frequencies from triggering the compression, the B-DYN helps preserve low-end clarity while maintaining the desired dynamic control. This feature is particularly useful when processing kick drums, bass guitars, or full mix busses where low-frequency energy can dominate the compression behavior.

De-Essing Mode for Smooth Vocal Processing
The B-DYN module includes a DS mode, designed to function as a de-esser for vocals and other high-frequency sources. This mode selectively compresses sibilant frequencies, making it an ideal tool for taming harsh esses in vocal recordings or controlling high-frequency transients in cymbals and acoustic instruments. With SSL’s signature warmth and precision, it ensures professional-quality results with minimal effort.

Automatic Makeup Gain for Consistent Levels
To maintain a balanced output level, the B-DYN features auto makeup gain, which compensates for level reduction caused by compression. This ensures that the processed signal remains strong and present in the mix, eliminating the need for constant manual gain adjustments. This intelligent design allows for fast workflow and reliable, polished results across a variety of sources.