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Solid State Logic Bus+ 2-channel Bus Compressor

2-channel Bus Compressor with Dynamic Equalizer and 4 Modes of Operation
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The Ultimate Incarnation of the SSL Bus Comp

Since the first SSL 4000 B console was released in the late 1970s, Solid State Logic's famed Bus Compressor has been the audio engineer's tool of choice for gluing a mix together. The Solid State Logic Bus+ continues in this fabled tradition, packing five decades of analog-fueled dynamic punch into a convenient rackmount piece of hardware. The SSL Bus Plus boasts an authentic SSL Bus Compressor with multiple modes based on the XLogic, early 4K, and more for maximum sonic flexibility. The Bus+ also includes the D-EQ, a powerful 2-band analog dynamic equalizer for added sound shaping. Both the Bus Compressor and D-EQ are jam-packed with versatile features, enabling you to mold your mixes into an endless variety of sonic textures. The Bus+ contains 100% analog circuitry, with stepped, digitally controlled front-panel pots. This 2-channel processor gives you four modes of operation, external sidechain I/O, configurable processing order, sleep and auto-sleep modes, and a whole lot more. If you've been waiting to pull the trigger on an SSL-style bus comp, now's the time — the Solid State Logic Bus+ is their most advanced compressor to date.

The de facto choice for gluing together a mix

When pro audio enthusiasts think of Solid State Logic, one single piece of gear almost always comes to mind: their venerable SSL Bus Compressor. Originally released as part of the center section on their SSL 4000 B console in 1976, the SSL Bus Comp has been a mainstay in professional studios ever since. This compressor became so popular in fact, that engineers who didn't mix on SSL consoles wanted to integrate this iconic sound into their studios. Thus, SSL created a rackmount version of the Bus Comp — the FX G384 — in 1991. In 2002, the FX G384 was updated to fit alongside the company's XLogic processors, with a multichannel 5.1 version being released the following year. The Bus Compressor became available as a double-width XLogic X-Rack module in 2007, and in 2013 it was adapted into the 500 Series format. Beyond that, there are countless plug-in emulations of this revered hardware processor. If you want to achieve the same elusive, glued-together quality as a pro studio, why not rely on the same secret weapon they do? All you need to do is get your hands on the SSL Bus Plus. It delivers the fabled SSL buss glue and master buss compressor sound you're aiming for — plus a whole lot more.

The most versatile SSL Bus Comp — ever

The Solid State Logic Bus+ is brimming with exhilarating features, but let's face it: you're here for the bus comp. And the Bus+ doesn't disappoint. Housed inside of its eye-grabbing rackmount housing is an authentic SSL Bus Compressor circuit, complete with high-performance 2181 THAT VCAs. The compressor's Low THD Mode reduces low-frequency distortion for a pristine, modern character, while F/B Mode yields a more relaxed style of dynamic compression. Want early-4K-style grunge and grit? The Bus+ does that, too. You also get access to negative ratios for creative pumping effects, Attack and Release time constant options for added flexibility, plus an Auto 2 setting. Two ranges of precision MDAC-controlled make-up gain are also on hand, as is a variable sidechain highpass filter and a Mix control for dead-simple parallel compression. Moving-coil gain-reduction meters and an unlockable Transient Expander bonus mode are also included.

Powerful 2-channel analog dynamic EQ

In the realm of plug-ins, dynamic equalizers are a dime a dozen. That said, you won't find many analog versions of this powerful tone-shaping tool. The SSL Bus Plus aims to change this with its D-EQ. This exceptional 2-band, parallel dynamic EQ includes low- and high-frequency bands, with 16 selectable frequency points per band, for adding the perfect final sheen to your source material. The D-EQ vaunts Compress and Expand modes, plus three choices of time constants for each band: Nominal, Fast, or Auto. Each band boasts a 0.5dB–15dB adjustable range, and the high-frequency band can be switched to a bell shape, with selectable frequencies covering high-midrange and high frequencies. You get a G-Series mode that changes the D-EQ's low-frequency filter to a second order with a degree of under and overshoot; you also get tri-color activity LEDs and individual bands that can be bypassed. The engineers here at Sweetwater have found the Bus+'s D-EQ to be the missing ingredient in many of our mixes. You'll be shocked what it can do for yours.

Solid State Logic Bus+ 2-channel Bus Compressor Features:

  • Packs 5 decades of SSL Bus Comp tech into a convenient rackmount unit
  • Excels as a drum buss compressor, parallel compressor, and master buss compressor
  • Contains 100% analog circuitry, with stepped, digitally controlled front-panel pots
  • 2 channels with 4 modes of operation: Classic Stereo, Σ S/C Stereo, Dual Mono, or Mid-Side
  • Authentic SSL Bus Compressor circuit with high-performance 2181 THAT VCAs
  • Multiple compression modes based on the XLogic, early 4K, and more supplies maximum sonic flexibility
  • Negative compression ratios give rise to creative pumping effects
  • Attack and Release time constant options, plus an Auto 2 setting, unlock added versatility
  • 2 ranges of precision MDAC-controlled make-up gain
  • Variable sidechain highpass filter makes tailoring the compressor's behavior a piece of cake
  • Mix control supplies dead-simple parallel compression
  • Super-accurate moving-coil gain-reduction meters
  • Includes an unlockable Transient Expander bonus mode
  • 2-band, parallel dynamic D-EQ includes LF and HF bands
  • 16 selectable frequency points per band gives you plenty of sound-shaping options
  • Includes both Compress and Expand modes
  • 3 choices of time constants for each EQ band: Nominal, Fast, or Auto
  • Each EQ band boasts a 0.5dB–15dB adjustable range
  • HF band can be switched to a bell shape, with selectable frequencies covering high-midrange and high frequencies
  • G-Series mode changes the LF filter to a second order with a degree of under and overshoot
  • Tri-color activity LEDs and individually bypassable EQ bands
  • External sidechain I/O allows you to trigger the compressor with an external signal
  • Configurable processing order ensures maximum flexibility
  • Sleep and auto-sleep modes

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Tech Specs

  • 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
  • Height: 3.5"
  • Depth: 11.9"
  • Width: 19"
  • Weight: 13.1 lbs
  • Processor Type: 2-channel Bus Compressor
  • Manufacturer Part Number: 729743X2

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Customer Reviews

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Rated 5/5

The Bus + is a versatile beast!

With Stereo, Dual Mono and Mid-Side processing capabilities, this box is amazing! Very deep menus, SSL 4K emulation, low THD mode, it will do what you want it to do! Also having a 2 band dynamic EQ is amazing! I looked at other master bus processors, nothing I looked at compared to the versatility of this machine. Digitally controlled analog circuits, stepped potentiometers allowing total recall - this is a very well thought out unit and sounds absolutely amazing!!!
Music background: Audiophile, Drummer, Certified Mastering Engineer, Studio Owner
Rated 5/5

A match made in heaven.

The SSL Bus + is the perfect companion to my SSL Fusion. They were so clearly made for each other and integrate together perfectly in both quality and features. The bus comp section is very accurate and smooth. It doesn't smear the transients like a lot of other bus compressors do. The different modes make it very versatile and the sound is always clear and punchy. The low THD setting is fantastic as it helps keep the low end clear and punchy. The 4K mode is also great slowing you to go from very clear and transparent all the way up to very dirty with a lot of character and everywhere in between. Lastly the dynamic EQ is a very cool feature and I am looking forward to putting it to good use on upcoming mixes.
Rated 5/5

A homerun by SSL.

I got to say, I was glad I passed up on the fusion. But this one I couldn't. Anything you run through this box just sounds amazing. This is not an in-depth review. Just first impressions. And let me say this. You will not be disappointed.
Music background: Rapper, Producer, Engineer
Rated 5/5

yeah.....it did it

Took my pro tools plug in song and kicked it up a few notches totally....nothing against plug-ins....l did tracks with plug-ins...but once to ran my bounced song in mp3 form...not wav...but mp3 through the SSL.... BAM......there it was...all up in my face .... the mix was tight and flowing hard ....l had a Neve Portico 2..a distrssor.many hardware units..but lm a SSL sound dude .... if you got a home studio..and you can't afford a console.....l wish it provided a little more gain....like the TC Electronics FINALIZER did.... l used wavs J37 tape machine on all the tracks to be fair...so between the plug-ins and this SSL unit....you can almost sound like a console...almost...
Rated 5/5

SSL has out done themselves with this box

I use the Bus+ for tracking I also use it on my Master bus. The versatility is incredible along with the D-EQ and the Low THD the BUS + has really enhanced both my workflow and my final product. One of the best additions to my studio I've ever made.
Music background: Singer/Songwriter/Producer
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