Solid State Logic B-Series Dynamics 500 Series Module

The Solid State Logic B-DYN dynamics module takes the compressor/limiter and gate/expander circuitry from the SL 4000 B console — Solid State Logic’s first-ever console, released in 1976 — and puts it into a single 500 Series rack space. Unlike the VCA-based dynamics found in later SSL designs, the B-DYN uses the fader VCA as its gain element, giving it a distinctive, more aggressive character similar in topology to the famous SSL Bus Compressor. As a result, the B-DYN delivers a punchier, more colored compression style than its E-Series counterparts, making it a favorite for drums, bass, and full mix bus duty. In addition, the compressor section offers automatic makeup gain for fast deployment, so engineers can dial in heavy compression without constantly chasing output levels. Marshall Music South Africa stocks the Solid State Logic B-DYN dynamics module for studios across South Africa wanting the raw, classic 4000 B sound in their 500 Series racks.

Why the Solid State Logic B-DYN Dynamics Module Delivers Classic SSL Character

The compressor section offers fixed ratios of 2:1, 4:1, and 10:1 (limiting), plus a dedicated “DS” setting with a 7kHz high-passed sidechain for de-essing — when both the ratio and release controls are set to DS, the module becomes a fast, broadband de-esser with a 10:1 ratio, 2ms attack, and automatic release between 30-50ms triggered by sibilance. However, the standard compressor mode is just as characterful, with a fixed 30ms attack time, release settings from 0.2 to 1.6 seconds plus a program-dependent Auto mode, a threshold range of -20 to +10dB, and an HPF button that switches the sidechain filter to 185Hz to reduce unwanted pumping on bass-heavy material. The gate/expander section can function as a 20:1 gate or, with the EXP button engaged, a 2:1 expander, with a fast 0.2ms attack time, a threshold range of -30 to +10dB, and a RANGE control for setting the maximum gain reduction. Whether you’re after the raw punch of the original 4000 B on drums, smooth de-essing on vocals, or tight gating on a noisy source, the Solid State Logic B-DYN dynamics module brings that early SSL character to any 500 Series rack. Marshall Music South Africa can help South African studios add this classic dynamics module to their setup.

Tech Specs

• Format: 500 Series dynamics module (single rack space)
• Heritage: Based on the SL 4000 B console (SSL’s first console, 1976)
• Gain Element: Fader VCA design (Bus Compressor-style topology)
• Compressor Ratios: 2:1, 4:1, 10:1 (limiting), plus dedicated “DS” de-ess setting
• Compressor Attack: Fixed 30ms (2ms in DS mode)
• Compressor Release: 0.2s, 0.4s, 0.8s, 1.6s, Auto, or automatic DS release (30-50ms)
• Compressor Threshold: -20dB to +10dB
• Sidechain Filter: HPF button switches sidechain to 185Hz; DS mode uses 7kHz high-pass
• Gate/Expander: 20:1 gate or 2:1 expander (EXP button), 0.2ms attack
• Gate/Expander Threshold: -30dB to +10dB, with RANGE control for max gain reduction
• Additional Feature: Automatic makeup gain on compressor section

Solid State Logic

Founded in 1969 by Colin Sanders, Solid State Logic began life building switching systems for pipe organs before evolving into the world’s leading manufacturer of analog and digital audio consoles. SSL pioneered industry-defining technologies — including motorized fader automation and total recall of mixer settings — and its large-format consoles became the backbone of major recording, broadcast, film, and live sound facilities worldwide, shaping the sound of countless hit records.

In recent years SSL has brought that console DNA into the personal and project studio space, with a range of award-winning audio interfaces (SSL 2, SSL 2+, SSL 12, SSL 1), compact mixers, control surfaces, channel strips, and processing plug-ins. Renowned for high-bandwidth, low-distortion signal paths and the iconic “SSL sound,” the brand remains a benchmark name across professional and home studios alike.

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