SKU: 52335899088

Solid State Logic B-DYN 611B 500 Series Aggressive Character Compressor Module

Sale price$458.55 Regular price$509.50
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Description

Solid State Logic B-DYN 611B 500 Series Aggressive Character Compressor ModuleThe 4000 B Dynamics (B DYN) 500 series module takes the dynamics processor found in the channel strip of the SL 4000 B console and puts it into 500 Series format. Released in 1976, the SL 4000 B was the first commercially available console from Solid State Logic and famously used in The Stone Room at Virgins Townhouse Studio (London), Le Studio (Montreal) and Record Plant (LA). It was responsible for countless iconic records, including Phil Collins In

The 4000 B Dynamics (B-DYN) 500 series module takes the dynamics processor found in the channel strip of the SL 4000 B console and puts it into 500 Series format. Released in 1976, the SL 4000 B was the first commercially available console from Solid State Logic and famously used in ‘The Stone Room’ at Virgin’s Townhouse Studio (London), Le Studio (Montreal) and Record Plant (LA). It was responsible for countless iconic records, including Phil Collins’ ‘In the Air Tonight’ and Peter Gabriel’s ‘Intruder’, both of which feature characterful compression on drums and vocals. The B-DYN allows you to add heavily coloured, grabby, saturated compression from one of the rarest studio consoles ever made to your production toolkit.

Compressor/Limiter:  

RATIO - Stepped compression ratios 2:1, 4:1, 10:1 and ‘ds’. The ‘ds’ setting is a fixed 10:1 with an additional sidechain filter. When ‘out, the compressor is bypassed. 

THRESH - Whenever a signal exceeds the level set by this control, the compressor will start to act at the ratio set by the Ratio control. The Threshold and Ratio controls also provide automatic make-up gain.

HPF - A 6dB/Oct 185 Hz High Pass Filter in the compressor sidechain to help reduce bass pumping effects.

RELEASE - Switched/fixed release ranges from .2 ms to 1.6 ms with additional ‘DS’ & ‘Auto’ release options.

DS - The De-Ess mode changes the attack time from approx. 30 ms to 2 ms.

De-Ess (DS) mode
By setting Compressor Ratio and Release controls to ‘DS’ the B-DYN module is optimised for reducing sibilance (De-Essing). The De-Ess is a 10:1 ratio with filtered S/C input signal, delivering broadband compression triggered by sibilance. The ‘DS’ release is automatically varied in response to the processed signal between release rates of 30 & 50 ms. This is a much faster minimum release than you would normally expect from an SSL Dynamics section. The attack time is also reduced to a fast 2 ms, slightly faster than the E-Series Dynamics module on its fast setting.   

Gate/Expander
The B-DYN Gate/Expander section can act as a 20:1 Gate or as a 2:1 Expander when the EXP button is pressed. Its attack time is a fast 0.2 ms.

RANGE - Controls the maximum amount of gain reduction applied by the Gate/Expander. When set to ‘out’, the gate/expander is bypassed.

THRESH - Sets the threshold above which the the gate/ expander will be opened.

RELEASE - Sets how long the signal remains audible after the Gate/Expander closes.

EXP - Switches the gate to expander mode with a gentle curve, for subtler control of level below the threshold.

Features

  • Authentic recreation of SL 4000 B consoles dynamics processing
  • Design based on the SSL Bus Compressor 
  • Features Compressor/Limiter & Gate/Expander
  • Feedback design with Peak sensing for aggressive ‘grabby’ character 
  • Fixed compression ratios, 2:1, 4:1 & 10:1 with additional ‘DS’ mode
  • Fixed release times, DS, .2, .4, .8, 1.6 & renowned ‘Auto’
  • Auto make-up gain 
  • Sidechain High Pass Filter 
  • Stereo Link mode
  • New (classic) SSL flavour for your productions


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 52335899088

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andranik g.
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★★★★★ 5
Great replacement kit
Called around for quotes to get them replaced and everyone was quoting over $2k just for bellows. Figured I’d give it a try. The rubber is good quality and feels soft. Time will tell but this is an easy job if you’re mechanically inclined. Make sure you replace the plastic water pickup fitting while you’re at it. Found mine to be cracked on disassembly and had to wait for a new one. Should be a easy 3-4 hour job if your not doing the bearing and only doing bellows
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Reviewed in the United States on August 26, 2024
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Ben
New York, US
★★★★★ 3
Just ok
Qualities OK, but for Marine applications might want better
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Reviewed in the United States on August 3, 2025
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Barbara S.
Carnegie, US
★★★★★ 5
Great quality
Just as described.
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Reviewed in the United States on July 22, 2025
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Paul Kirchberger
West Palm Beach, US
★★★★★ 5
Bellows kit review initial inspection’s
Very good quality. The hose clamps were event the better ones you have to pay extra in most cases.
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Reviewed in the United States on April 6, 2025
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Captain Ron
Massapequa, US
★★★★★ 5
Good value, very useful for go kart wiring
Size: 100ft, Style: 6C-18AWG
It's a good spool to have around to wire lights and things on the go karts. Also came in handy when I had to patch a bit of melted wire harness on the tail of the old Dodge.
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Reviewed in the United States on May 6, 2026

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