Bus+ 2-channel Bus Compressor

If there is a single piece of analogue processing equipment that is synonymous with SSL, it must be the SSL Bus Compressor. From the very first commercially released SSL 4000B console in 1976 and through many generations of SSL consoles that have followed, the Bus Compressor has always been the stalwart of the console centre section. 

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Features & Compatibility

For many of the world’s top engineers and producers, the Bus Compressor continues to be the most relied upon processing tool for making mixes sound bigger and more complete, with drive and energy from adding that legendary SSL glue and punch.

We’ve been on a mission to create the ultimate and most versatile incarnation of the Bus Compressor ever. The bedrock of the design remains faithful to the original circuit and using this as the foundation, we’ve built upon it, adding several unique colouration options and advanced processing tools. If you need it to be clean and punchy like the SuperAnalogueTM 9000 Series version, it can be. If you need it to be gritty and grungy like an early 4000E, it can do that also. Or if you need over-the-top, saturated, parallel compression for the drums, THE BUS+ has got you covered.

THE BUS+ circuit design utilises high-grade components, including 2181 THAT VCAs for superior analogue performance, four modes of operation and 3 distinct compression colouration options which can be combined to perfectly suit the genre you’re working on. THE BUS+ also packs in sophisticated routing options and advanced processing tools: Dynamic Equaliser (D-EQ), Transient Expander and so much more…

Innovation

To complement the new feature set, we sought to bring improvements that would benefit recallability and technical performance.

All of the pots on THE BUS+ are stepped and read by a microcontroller which translates the pots position into the required circuit configuration or electrical parameter. This innovative approach not only makes recall significantly easier, it also means THE BUS+ is not subject to pot tolerances – prefect for precision processing applications like mastering.

Dynamic Analogue Equaliser: D-EQ

THE BUS+ incorporates a host of advanced processing tools including the new Dynamic Analogue Equaliser (D-EQ).

The D-EQ is a powerful 2-band Dynamic EQ that can be placed before or after The Bus Compressor. Many engineers are familiar with Dynamic EQ plug-ins inside the DAW but analogue Dynamic EQs are few and far between.

A Dynamic EQ is a more ‘intelligent’ form of EQ that changes the gain of an EQ band proportionally in response to the signal level once above a set threshold. It allows you to modify the contrast between background material (under threshold) and forward material (above threshold).

Features

100% analogue circuit, controlled digitally using stepped front-panel pots
Huge +27.5 dBu headroom
Configurable processing order – Bus Compressor pre D-EQ (default) or post
CH 1 IN and CH 2 IN buttons for global bypass
Settable Operating Level – 0 dB (nominal), +10 dB, -5 dB
Sleep and Auto-Sleep modes
Precision MDAC-controlled MAKE-UP Gain with two ranges – 1 dB or 0.5 dB steps
Buss Compressor

4 modes of operation – Classic Stereo, Σ S/C Stereo, Dual Mono or Mid-Side
External side-chain inputs and sends
The authentic SSL Bus Compressor circuit
LOW THD Mode reduces low-frequency distortion caused by compression
F/B Mode alters the compression characteristics for a more ‘relaxed’ style of compression
4K Mode – single VCA operation with variable harmonic distortion to bring some ‘grit’ and ‘grunge’ to the mix
Negative Ratios – for creative pumping effects and control of particularly loud signals
New Attack and Release options, including the new ‘Auto 2’ setting
MIX control for instant parallel compression
Moving-coil gain reduction meters
Unlockable Transient Expander
D-EQ

Powerful 2-band analogue Parallel Dynamic EQ – the D-EQ
Compress/Expand modes
3 choices of time constants for each band – Nominal, FAST or AUTO
16 selectable Frequency points per band
Adjustable Range control per band from 0.5 dB to 15 dB
HF band can be switched to Bell shape, with selectable frequencies covering High-Mids and Highs
Frequency band static ‘make-up’ gain for LF and HF bands (Stereo/ Σ S/C Stereo) or LF band (Dual Mono/Mid-Side)
G-Series mode changes LF filter to be 2nd order with degree of undershoot/overshoot
Tri-colour activity LEDs to indicate D-EQ activity
Individually bypass-able bands

Type: Bus Compressor
Number of Channels: 2
Controls: Threshold, Ratio, Attack, Release, Make-up, Mix
Threshold: +20dB
EQ: 2-band EQ
Frequency Response: 20Hz-20kHz
Inputs: 2 x XLR
Outputs: 2 x XLR, 2 x XLR (EXT Send)
Sidechain I/O: 2 x XLR (L/R)
Rack Spaces: 2U
Power Source: Standard IEC AC cable (Included)
Height: 3.5″
Depth: 11.9″
Width: 19″
Weight: 13.1 lbs

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