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2016 SBS Designs Iso-Q2(S) Studio


Jan 2, 2016 SBS Designs Iso-Q2 (S) Studio Series Review by Multiple gold platinum Grammy award mix engineer; Barry Rudoplh – from New Toys section

The studio version of SBS Designs’ Iso-Q2 Advanced Isolator & Focusing Equalizer has now been updated with resettable, detented gain controls making it easier to recall previous settings. Introduced in 2011, the 1U SBS Iso-Q2 has already seen use as a three-band program EQ in live sound for nightclubs, touring DJs, and has lately found its way into recording and mastering studios.

Key to its design philosophy is the way the Iso-Q2 handles its three bands of equalization. The front panel has separate Bass Frequency and Mid-High Frequency sweepable controls that set the exact lower and upper crossover frequencies between the Bass frequency and High frequency equalizer sections on either side of the central Mid-Range equalizer section.

The Low Frequency sweeps from 50Hz to 400Hz while the Mid-High Frequency sweeps from 3.1kHz to 12.6kHz. It gets fun when I figured out that the three, large detented Bass, Mid-Range Gain and Mid-High Gain controls range from off at fully CCW and up to +15 dB of boost at full CW. They are at unity gain position straight up in the 12noon position; essentially reproducing that band of frequencies at whatever level is presented at the input.

For program equalization, it easy to “build up” the spectral “shape” of a mix by defining these three bands with the application of different amounts of boost or cut using the three bands’ gain controls.

However, the SBS Iso-Q2 does not have frequencies or gain amounts silkscreened on the front panel and this encourages the engineer to listen to what it sounds like. I liked the smooth operation of these controls and the super clean sound. Probably because it is controlling a large amount of very hearable frequencies, I also found the Mid-Range Gain level to be a little touchy to set compared to the Bass and Mid-High Gain controls. It seems that the range of boost/cut in the Mid-Range section could be spread out on the control.


I wanted to accurately set up the Iso-Q2 for my first use. I set (as a kind of default) all three Gain controls and the Bass Frequency control fully CCW and put the Mid-High Frequency control at full CW. I then passed a 1kHz tone through the unit and obtained unity gain at the output when only the Mid-Range Gain control was set straight up at 12noon. I found little interaction (overlap) of the other controls for this measurement.

It would be a nice touch if there was a way to have this Mid-Range Gain control “click” when at unity–actually I’d be fine with silkscreen marking unity gain on the front panel. The calibrated Mid-Range Gain control (at unity), the Bass Frequency at CCW, the Mid-High Frequency at CW and both the Bass and Mid-High Frequency Gain controls at full CCW or off would be my starting setup whenever I would begin using the ISO-Q2 during a session.

The SBS Iso-Q2 has no hardwire bypass feature so when I connected it to my Pro Tools HDX system’s I/O, I set up two stereo paths (one with the unit in the path and one without) to A/B, with and without, the Iso-Q2′s effect quickly just like when using any other equalizer in the studio.

In The Studio

I tried the Iso-Q2 on full program mixes and individual instrument and vocal stereo tracks in my Pro Tools mixes. I found the unit to be super quiet and noise-free and best suited for overall equalizing of finished mixes, stereo keyboards–pianos and synth pads, orchestral strings, and stereo drum loops. The manual offers several tips for usage along with the approximate knob locations of the Bass and Mid-High frequency points on the front panel.

The Iso-Q2 has balanced XLRs input and output connectors as well as unbalanced inputs and outputs on RCA jacks. There are also RCA jack connections for a selectable unbalanced loop insert path along with a rear panel master gain control.

The Iso-Q2 Studio Version is made in the US and has a ten-year warranty. For more information, check: Distributed by
Full review by Barry Rudolph Coming soon Music Connection Magazine

Barry Rudolph Gold & Platinum sales awards

Recording Industry Association Of America GOLD AND PLATINUM SALES AWARDS
More About The History Of The Collectible Gold And Platinum Awards Here!
“Talk On Corners” The Corrs •143 Records/Atlantic MULTI-PLATINUM
“Street Survivors” Lynyrd Skynyrd •MCA TRIPLE PLATINUM
“Daryl Hall and John Oates” Daryl Hall And John Oates (Silver Album) •RCA GOLD
“Songs of West Side Story” (Various Artists) •BMG/RCA GOLD
“Enrique Iglesias” Enrique Iglesias •Fonovisa TRIPLE PLATINUM
“Sara Smile” single From Hall and Oates’ Album •RCA GOLD
“Are You Ready For The Country” Waylon Jennings •RCA GOLD
“Just An Illusion” Najee •Orpheus/EMI GOLD
“Solo Pienso En Ti” Lucero •Melody Records GOLD
“Show and Tell” Al Wilson •Bell/Rocky Road Records GOLD
“Lynyrd Skynyrd Box Set” Lynyrd Skynyrd •MCA Records GOLD
“Diana, Princess of Wales Tribute” (Various Artists) •Sony Records MULTI-PLATINUM
“Show And Tell” single From Al Wilson’s Album •Bell/Rocky Road Records GOLD
“Back Here” Single from BB Mak’s Album •Hollywood Records GOLD
More About The History Of The Collectible Gold And Platinum Awards Here!


National Academy Of Recording Arts And Sciences THE GRAMMY AWARDS
More About All Of The Grammy Awards Here!
1992-Participation Certificate for “Best Contemporary Soul Gospel Album” “Handel’s Messiah” (Various Artists)
1996-Participation Certificate for “Best Latin Pop Performance” “Enrique Iglesias”
1996-Participation Certificate for “Best Pop Contemporary Gospel Album” “Tribute-The Songs of Andrae Crouch” (Various Artists)

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