EQ 2.2 / EQ 2.2-VU / EQ 8
Rackmounted EQ modules from the Ark8 console


Based on modules from the Ark8 console, our rackmount equalisers offer the quality of the Ark8 in an affordable package.
Not ready for the Ark8 yet, but want the great sound?
One of our rackmounted EQ modules may very well be the solution.


The EQ section of the Ark8 is pretty amazing.
While adding silky smooth colour to any track, you also get a lot of control.

The EQ section of the Ark8 is the
IP211 module.
The IP211 features 4-band Inductive Equaliser, Hi-Cut filter, Lo-Cut filter and Swing EQ.
But since the Ark8 is an inline console, the IP211 has 2 audio paths.
Each of the four EQ sections - of each module - can be independently used on either “A” or “B” audio path.
(on the Ark8 console these are called “Large Fader” and “Small Fader” audio path)

The EQ 2.2 features
two of these IP211 modules, mounted horizontally in a 2U 19 inch rack.
Each module has 2 in- and outputs, and 2 audio paths, actually making the EQ 2.2 an EQ with 4 I/O

The EQ 8 features
eight of these IP211 modules mounted vertically in a 6U 19 inch rack.
Each module has 2 in- and outputs, and 2 audio paths, actually making the EQ 8 an EQ with 16 I/O

The EQ 2.2 and EQ 8 are built-to-order only.


In short:

The EQ 2.2 has 2 channels with 2 audio paths and 2 in- and outputs each.
Each channel has 4 EQ sections which can be used on either of the two audio paths.

The EQ 8 has 8 channels with 2 audio paths and 2 in-and outputs each.
Each channel has 4 EQ sections which can be used on either of the two audio paths.

Each module (channel) of the EQ 2.2 or EQ 8 has 4 EQ sections.
- Hi-Cut filter
- Lo-Cut filter
- 4-band Inductive Equaliser
- Swing EQ

All our EQs are based on the IP211 EQ module from the Ark console.
Full details can be found on the
IP211 page

All four EQ sections of the IP211 / EQ 2.2 / EQ8 can be used independently from each other,
on either of the audio paths, or can be combined for “extreme” EQ-ing.

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Hi-Cut filter
(also called Low-Pass filter)

As it’s name implies, the Hi-Cut filter cuts off the high frequencies.

It sweeps over 5 octaves from 16 KHz down to 500 Hz
Our Hi-Cut filter can be used on the A or B signal path,
and separate or in combination with the other EQ sections.
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Hi-Cut filter (also called Low-Pass filter)
EQ 2.2, EQ 2.2-VU and EQ 8


As it’s name implies, the Hi-Cut filter cuts off the high frequencies.

It sweeps over 5 octaves from 16 KHz
down to 500 Hz, and has a 12 dB per octave cut.
The Hi-Cut filter can be used on the A or B signal path,
and separate or in combination with the other EQ sections.

Click Image for more

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Lo-Cut filter
(also called Hi-Pass filter)

As it’s name implies, the Lo-Cut filter cuts off the low frequencies.

It sweeps over 5 octaves from 25 Hz up to 800 Hz
Our Lo-Cut filter can be used on the A or B signal path,
and separate or in combination with the other EQ sections.

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Lo-Cut filter (also called Hi-Pass filter)
EQ 2.2, EQ 2.2-VU and EQ 8


As it’s name implies, the Lo-Cut filter cuts off the low frequencies.

It sweeps over 5 octaves from 25 Hz
up to 800 Hz, and has a 12 dB per octave cut.
The Lo-Cut filter can be used on the A or B signal path,
and separate or in combination with the other EQ sections.

Click Image for more.

4-band inductive EQ
EQ 2.2, EQ 2.2-VU and EQ 8

Inductor based circuits are the “holy grail” of equaliser designs.

These were used for example in the much favoured Pultec equaliser design, which dates back to the late 1950’s.
Owing to their unique electro-mechanical properties, inductors impart a character all of their own, which is very distinctive.

Each channel of our inductive EQ uses 16 inductors spread out over the four bands, with custom-wound Carnhill inductors in the low-mid and low bands, giving precise control and the distinctive inductor sound on each band.

This is a Class-A, discrete design, with all components carefully chosen and matched to provide an extremely musical sound. You’ll get a very distinctive sound, which most sound engineers love.
However, this circuit is a decidedly modern design with updated techniques and components that were simply not available 60 years ago.
This is definitely not a “clone”or “copy” (we at Interphase Audio do not build clones or copies of anything)

As a consequence of using inductors, this provides a “peaking” or “bell” characteristic, giving much tighter control of the frequency selected.

Each band provides switch selection of any of 6 carefully selected frequencies chosen at musically pleasing intervals.
Each band uses a fader - instead of a rotary control - for cut and boost, allowing a maximum of plus or minus 15dB per band.

Our 4-band inductive EQ can be used on the A or B signal path, separate or in combination with the other EQ sections.

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Four bands with switchable, overlapping fequencies

- Low (Hz): 50, 80, 100, 150, 300, 600
- Low Mid (Hz): 125, 250, 500, 1K, 2K, 4K
- Hi Mid (kHz): 1.5, 3, 5, 6, 7, 8
- High (kHz): 8, 9, 10, 12, 14, 16
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Four bands with switchable, overlapping fequencies

- Low (Hz): 50, 80, 100, 150, 300, 600
- Low Mid (Hz): 125, 250, 500, 1K, 2K, 4K
- Hi Mid (kHz): 1.5, 3, 5, 6, 7, 8
- High (kHz): 8, 9, 10, 12, 14, 16

But why faders instead of rotary controls ?

It’s simple … we like faders.
But also because faders give much better visual control of the level of cut or boost, so you know what’s going on at a glance.

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Swing EQ

Our Swing EQ is a fast and easy way to make a track sound “warmer” or “cooler”.
By turning the one-control-knob counterclockwise, you attenuate the highs and boost the lows, making the sound darker.
By turning the one-control-knob clockwise, you attenuate the lows and boost the highs, making the sound brighter or cooler.
Our Swing EQ can be used on the A or B signal path, separate or in combination with the other EQ sections.

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Swing EQ
EQ 2.2, EQ 2.2-VU and EQ 8

Our Swing EQ is a fast and easy way to make a track sound “warmer” or “cooler”.
By turning the one-control-knob counterclockwise, you attenuate the highs and boost the lows, making the sound darker.
By turning the one-control-knob clockwise, you attenuate the lows and boost the highs, making the sound brighter or cooler.
Our Swing EQ can be used on the A or B signal path, separate or in combination with the other EQ sections.

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Output Level Controls

Each of the 4 outputs has its own level control, with 15dB boost or cut.

The EQ 2.2 has 4 inputs and 4 outputs, which are all doubled.
Each input has a female XLR and a balanced jack connector. These connectors are paralleled, you can use either.
Outputs have male XLR and balanced jack connectors. These connectors are paralleled, you can use both at the same time.

Note: While you can use both XLR and jack outputs at the same time (for example to split the outputs and send these to multiple destinations), it is not a good idea to use both XLR and jack inputs at the same time.

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Output Level Controls
EQ 2.2 and EQ 2.2-VU only

Each of the 4 outputs has its own level control, with 15dB boost or cut.

The EQ 2.2 has 4 inputs and 4 outputs, which are all doubled.
Each input has a female XLR and a balanced jack connector. These connectors are paralleled, you can use either.
Outputs have male XLR and balanced jack connectors. These connectors are paralleled, you can use both at the same time.

Note: While you can use both XLR and jack outputs at the same time (for example to split the outputs and send these to multiple destinations), it is not a good idea to use both XLR and jack inputs at the same time.

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VU meter (EQ 2.2-VU only)

High-quality analogue VU meter with LEDs for illumination installed above the VU.
(These LEDs have a much longer life-span than the standard light bulb in the VU)

The VU meter section features two rotary switches.
The left selects the signal to be read by the VU. This can be any of the 4 inputs or 4 outputs.
The right switch changes the VU level reading.
This can be either standard 0 VU = +4dB or alternatively 0 VU = +10dB


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VU meter
EQ 2.2-VU only

High-quality analogue VU meter with LED illumination.
(These LEDs have a much longer life-span than the standard light bulb in the VU)

The VU meter section features two rotary switches.
The left selects the signal to be read by the VU. This can be any of the 4 inputs or 4 outputs.
The right switch changes the VU level reading.
This can be either standard 0 VU = +4dB or alternatively 0 VU = +10dB


What are Inductors ?

Inductors are wires wound around a coil that provide a form of frequency-dependant resistance. When they saturate, they bring out beautifully musical harmonics that give your tracks the silky-smooth, polished sound that has made classic consoles and equipment so desirable for over sixty years. This is what makes them different from capacitor-based EQ designs, which do a great job at surgical equalisation. But it has always been up to Inductors to provide the tone.

While some of the inductors we use are off-the-shelf, we also use custom inductors. This attention to detail in controlling variables such as the winding and core materials in relation to the surrounding circuitry allows our Inductor EQ’s to capture the classic sound, while at the same time be up to todays standards in sound-quality and noise level.

Rear Panel layout

Inputs and outputs? We’ve got you covered.

The EQ 2.2 has 4 inputs and 4 outputs, which are doubled.
Each input has a female XLR and a balanced jack connector. These connectors are paralleled, you can use either.
Outputs have male XLR and balanced jack connectors. These connectors are paralleled, you can use both at the same time.

The EQ 8 has 16 inputs and outputs, which are tripled.
Each input has female XLR, balanced jack and D-Sub connectors. These connectors are paralleled, you can use either.
Outputs have male XLR, balanced jack and D-Sub connectors. These connectors are paralleled, you can use all of them at the same time.

Note: While you can use XLR, Jack and D-Sub output connectors at the same time (for example to split the outputs and send these to multiple destinations), it is not a good idea to use multiple input connectors - of each channel - at the same time.

EQ 2.2 video - Acoustic Drums

EQ 2.2 video - Electronic Drums

EQ 2.2 video - Keyboard - Superstition

EQ 2.2 video - Solo Vocal - Pump up the Jam

EQ 8 video - Piano and Bass - Bohemian Rhapsody

The EQ 2.2 and EQ 8-R are a number of IP211 modules in a rack case, you can perfectly use the Short Manual and Recall Sheet of the IP211 to get you started.

Our products can be ordered from our store.interphase.audio in your local currency.
You can also click the order button below and go to check out later.
On check out prices will be converted to your local currency.
We don’t have to charge VAT if you’re outside the EU, this is automatically calculated on check out.

EQ 2.2

€ 1980 (excl. VAT)
€ 2395 (incl.VAT)

EQ 2.2-VU

€ 2145 (excl. VAT)
€ 2595 (incl.VAT)

EQ 8

€ 5777 (excl. VAT)
€ 6990 (incl.VAT)