In-Depth Review: Abbey Road Studios Brilliance Pack by Softube

“Meticulously modeled by Softube, the RS127 Rack, RS127 Box and RS135 deliver the sweetest treble equalization imaginable.”

The Abbey Road Studios Brilliance Pack by Softube is a pretty straight-forward set of plugs. The RS127 Rack & Box only have two parameters. One to set the frequency crossover point for the EQ, which itself only has 3 settings, and the gain knob. The RS135 only has one, the gain knob, because the frequency crossover is set to 8 kHz as it was with the original piece of hardware.

I was a bit skeptical at first. The price tag is a bit hefty for 3 plugs that only have a combined 5 adjustable parameters. But, with a name like Abbey Road Studios and Softube I knew I might be pleasantly surprised.

They are meant to boost the high end “air”, “breath” and “brilliance” without signal degradation and the harshness that comes along with it.

Buy Abbey Road Brilliance PackPIB/AbbeyRoadBrilliance

In this video I add each of the plugs to a couple different tracks to compare them to each other and an already nice mix without them. Watch & Listen. You might be surprised too!

This video is quite long.

I test and compare each of the plugs on the same premasters of the following genres

  • acoutsic reggae
  • nu-disco
  • small room deep house
  • dubstep
  • drum and bass
  • edm
  • melburce bounce

At the end I really max out the gain boost settings for the RS127 Box & Rack.

Overall, by the end of the video, you will get a very good idea of what these plugs can do!


Abbey Road RS135


Abbey Road RS127 Rack


Abbey Road RS127 Box

Watch the Test / Review Video

*release notes below

Release Notes

Buy Abbey Road Brilliance PackPIB/AbbeyRoadBrilliance

Brighten up your life with these classic Abbey Road Studios equalizers! Meticulously modeled by Softube, the RS127 Rack, RS127 Box and RS135 deliver the sweetest treble equalization imaginable. With the Brilliance Pack, today’s DAW-based mix engineers can add all the air and top frequencies they want, without the slightest trace of harshness—just like Abbey Road Studios’ engineers have done on their recordings from the 1960s onwards.

Abbey Road Studios engineers found the presence boxes excellent for guitars, vocals and drums, especially snare and kick drum direct to tape. The units were in constant operation throughout the studios during recording and mixing, used to define the sound of instruments, brighten up the feed to the echo chambers and patch over compressors to create de-essers. They even found their way into the cutting rooms.

The original equalizers were exclusively built in-house by the Abbey Road engineers in the 1960s and quickly became a secret weapon at the studios. Before the plug-in version was released, they had never been available outside of Abbey Road Studios. Softube has faithfully modeled the passive circuitry of the three original units, component by component.

RS127 Rack (grey faceplate)

The grey RS127 Rack is the original Abbey Road Studios treble equalizer. It offers a boost or cut of up to 10 dB at 2.1, 3.5 and 10 kHz (or kilocycles per second as they used to be known).

Softube RS127 Rack Plugin Boutique

RS127 Box (green faceplate)

When more units were needed in the studio, the portable green RS127 Box was built. The same circuit was used as in the original RS127, but with the addition of an audio transformer. The engineers quickly discovered that the transformer dramatically altered the sound character and the operating frequencies of the RS127. The frequencies got shifted a bit higher, which is of course also holds true for the plug-in model.


Lastly, the RS135 was created to fill in the frequency gap that the RS127 units left out. It’s fixed at 8 kHz, offers boost only and is just as sweet and silky as its siblings.

So there you have it—a pack of brilliant, beautiful treble equalizers, straight out of Abbey Road Studios!

In short

  • Adds beautiful sounding treble and presence without harshness
  • Three different passive treble equalizers, modeled from Abbey Road Studios’ originals
  • The original grey RS127, the green RS127 with added transformer and the 8 kHz only RS135
  • Very low CPU usage
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Author: Joshua Casper

Joshua Casper is an Artist, Musician, and Blogger.

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