Interphase AudioUnique Pro Audio Gear


Taken from the middle section of the Ark input channels, the EQ 2.2 is the rackmount version of 2 channels of this middle input section.
The EQ 2.2 is designed to add colour to your signal, and silky smooth colour that is.

The EQ 2.2 features 2 modules, each containing 4-band Inductive Equaliser, Hi-Cut filter, Lo-Cut filter and Swing EQ.
Each module has 2 in- and outputs, and 2 audio paths, actually making it an EQ with 4 I/O

Each of the four EQ sections - of each module - can be independently used on either “A” or “B” audio path

The EQ 2.2 is available as a 2 unit 19-inch rackmount unit.


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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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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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Four bands with switchable, overlapping fequencies

- Low : 50, 80, 100, 150, 300, 600 Hz
- Low Mid : 125, 250, 500, 1K, 2K, 4K Hz
- Hi Mid : 2.5, 3, 5, 6, 7, 8 KHz
- High : 8, 9, 10, 12, 14, 16 KHz



Why faders instead of rotary controls ?

Simply, just because we like it.
But also, in our opinion, this gives much better visual control of the level of cut or boost, so you know what’s going on in a glance.


4-band inductive EQ

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.

Our inductive EQ uses inductors in each of the four bands (unlike other so-called inductive EQ’s on the market), giving precise control and the distinctive inductor sound on each band.

As a consequence of using inductors, this provides a “peaking” characteristic, giving much tighter control of the frequency selected.
The inductor values and components have been carefully chosen and matched to provide an extremely musical sound.

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

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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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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Output Level Controls

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

All switches on the EQ 2.2 are illuminated.
The light intensity of all those switch LEDs and the VU meter LEDs can be controlled by the Global Light Trim control, which can be reached through the small hole next to the word output.


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VU meter section

High-quality analogue VU meter with LEDs installed above the VU.
These 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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Rear Panel layout

All inputs and outputs of the EQ 2.2 are doubled.
Inputs have female XLR and balanced jack connectors. These connectors are paralleled, you can use either.
Outputs have male XLR and balanced jack connectors. These connectors are paralleled, but you can use both at the same time.
Below are two short movies of the EQ 2.2
and a movie of the EQ 2.2’s big brother - the EQ 8.
EQ sections and routing on the EQ 2.2 and EQ 8 are the same, so either movie should give you a good idea.
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EQ 2.2 Block Diagram
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Summary

The EQ 2.2 has 2 channels, with 2 audio paths and 2 in- and outputs each.
Each channel has 4 EQ sections.
All four sections of the EQ 2.2 can be used independently from each other, on either of the audio paths of each channel, or can be combined for “extreme” EQ-ing.
Each of the 4 outputs has level control, the VU meter can read either of the 4 inputs or either of the 4 outputs.
© 2015 - 2019 - Interphase Audio