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EQ2484 | Dual Mono Classic Inductor Based Mastering / Recording Equalizer

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Classic Analogue Design

Inductor Based EQ Filters

Active Hybrid’84 Discrete Circuitry

Transformer Coupled Inputs and Outputs

Made with Selected NOS Components

Handcrafted and Tested in England

Limited Number of Preamps Available!

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Brand new, fully assembled, tested and ready to use.

$1779

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EQ2484 | Inductor Based Equalizer

In modern era of digital recording the need for high quality analogue recording equipment is constantly growing. The DAW systems make recording engineers task much easier and we all know that.

However there is the price to pay for that convenience. Sound produced by digital workstations is often different from what we would wish.

Music recorded and produced with analogue equipment sounds better and more pleasing. This is why in the professional recording studios discrete transistors equipment is used all the time.

The use of classic outboard gear built according to “old-school” design practice adds valuable missing magic to the tone.

Inductor / Transistor Circuitry

Custom HRK Transformers

Hybrid’84 Circuitry

Handmade Analogue Preamps

The EQ2484 is made with custom made HRK multi-taped Inductors.

The frequency can be selected with rotary switch. Each switch position couples inductor tap and capacitor to create resonance circuit for selected frequency.

Today inductors can be found only in very expensive gear.

Vintage Inductor based EQ’s have unique sonic character.

This is why equalizers restored from old recording consoles are well regarded by sound engineers.

EQ2484 Inputs and Outputs are coupled with Large Format Handmade HRK Audio Transformers.

The output transformers are powered by ultra-low distortion transistor driver circuit.

EQ2484 introduce very low THD to the audio signal but it adds subtle colouration to the signal, typical for Analogue Outboard Preamps.

Hybrid’84 Circuitry uses Solid Sate Opamps to achieve low THD levels and Discrete NOS Transistors to produce warm and rich sound.

All transistors have been selected for the best performance and sound characteristics.

Hybrid’84 Circuitry uses Solid Sate Opamps to achieve low THD levels and Discrete NOS Transistors to produce warm and rich sound.

All transistors have been selected for the best performance and sound characteristics.

Features which makes EQ2484 Unique!

Equalizer Characteristics

EQ2484 | Performance Specification

Discrete Transistor Circuitry Design – similar like in vintage recording equipment from 60’s and 70’s

Selected high quality NOS transistors – I spent a lot of time to find right transistors to create perfect tonal performance

Inductor based EQ – signature of high value recording equipment – transistors and coils were widely used in the vintage circuits

Custom Large Format HRK transformers – capable of transfering large signals – the sound is natural with the bit of pleasant colouration

Transformer coupled inputs and output – another well regarded solution in the professional equipment

Pristine sonic performance – class A discrete circuitry and transformers produce almost only 2nd harmonic distortions – warm and rich sound!

Lows Shelf

6kHz -/+ 18dB
8kHz -/+ 18dB
10kHz -/+ 18dB
12kHz -/+ 18dB

Low Mids

220Hz -/+ 18dB
330Hz -/+ 18dB
470Hz -/+ 18dB
680Hz -/+ 18dB
820Hz -/+ 18dB
1.2kHz -/+ 18dB

High Mids

1.5kHz -/+ 18dB
2.3kHz -/+ 18dB
3.5kHz -/+ 18dB
4.5kHz -/+ 18dB
6kHz -/+ 18dB
8kHz -/+ 18dB

Highs Shelf

6kHz -/+ 18dB
8kHz -/+ 18dB
10kHz -/+ 18dB
12kHz -/+ 18dB

Number of channels: 2
Inputs: Line input – channel 1 and 2

Each channel is independent and consist Low shelf, Low Mid’s bell, High Mid’s bell and High shelf section.
Low and High band has 4 selectable frequency settings. Low and high Mid’s have 6 selectable frequency settings.

Noise floor (EQ bypassed) – less than -90dBu
Noise floor (EQ engaged, controls set to 0)
less than -89dBu

THD+N (EQ bypassed)
less than 0.012% @ 1kHz in Bandwidth 10Hz – 80kHz
THD+N (EQ engaged, controls set to 0)
less than 0.02% @ 1kHz in Bandwidth 10Hz – 80kHz

The most dominant source of Harmonic Distortions are input and output audio transformers.
The THD content is mostly consists of second harmonic distortion
and following even harmonics.

Frequency response (EQ bypassed): -0.5dBr@10Hz – +0.4dBr@20kHz
Note: Relative to 0dBu@1kHz