Up for sale is the SSL B-DYN, an authentic 500-series recreation of the legendary dynamics section from the SL 4000 B console. If you are looking for that aggressive, "grabby," and characterful 80s compression—think Phil Collins' drums or Peter Gabriel's vocals—this is the module that delivers that exact vibe.

Unlike the later, more transparent E-series or 9000-series dynamics, the B-DYN uses a feedback VCA design (similar to the SSL Bus Compressor) that adds beautiful harmonic saturation and "smack" to your transients. It’s a specialized tool for when you want your compression to be heard and felt.

Key Features:

• B-Series Heritage: Faithful recreation of the original 1976 4000 B channel strip circuitry.
• Characterful Compression: Feedback topology with peak sensing for an aggressive, colored sound.
• Stepped Ratios: 2:1, 4:1, and 10:1 settings for consistent, repeatable results.
• DS (De-Ess) Mode: Optimized fixed 10:1 ratio with a sidechain filter and ultra-fast attack/release for transparently taming sibilance.
• Auto Make-Up Gain: Automatically compensates for gain reduction, making it incredibly fast to dial in.
• Gate/Expander Section: Features a 20:1 gate or 2:1 expander with a lightning-fast 0.2ms attack time for precision cleaning.
• Sidechain HPF: Built-in 185Hz high-pass filter to prevent low-end energy from pumping the compressor.

Condition: This unit has been a key part of my professional, smoke-free studio setup in Los Angeles. It is in Excellent / Mint condition, functioning perfectly. It has been housed in a high-current rack alongside other high-end 500-series modules.

Note on Format: The SSL B-DYN occupies 1 slot in a standard 500-series rack.

Technical Specs

• Format: Single-Slot 500 Series
• Threshold: -20dB to +10dB (Compressor) / -30dB to +10dB (Gate)
• Release Settings: 0.2, 0.4, 0.8, 1.6 ms and Auto
• Attack Time: ~30ms (2ms in DS mode)
• Link: Stereo sidechain link compatible