Vintage Digital & Analogue Studio Effects

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Avalon Deisgn AD2055

Avalon Design AD2055 Music Equalizer

The Avalon AD2055 Pure Class A music equalizer is the most powerful, low noise parametric equalizer available today, or at least it was. Designed to optimize absolute signal integrity and musical performance.


The Avalon Design AD2055 is the perfect solution for two buss music-program equalization, special instrument EQ and FX applications and ultra high performance mastering studio’s. Features include state-of-the-art, balanced 100% discrete, Pure Class A signal amplifiers, practical user features and rugged hardware designed to deliver true high performance audio for many years.

Passive-Active Filter Design
Avalon equalizers feature the unique combination of both active and passive filter EQ designs. This special combination enables the Avalon Design AD2055 to deliver high speed transient detail at the operational extremes of real-world equalization demands. The passive high and low bands offer alternate musical tone range to the full function active parametric mid bands.

Passive equalizers have long been a favourite with music lovers around the world. Full bodied, powerful (up to +/-32dB, 64dB range !) and sweet frequency selections are the benefits of the passive high-low EQ bands. The full bandwidth twin mid bands provide variable frequency selection (X10 frequency multipliers for very wide range), variable Q (width) and amplitude control.

Minimum Signal Path Design
Avalon’s advanced true symmetry design offers high-voltage, large headroom, extended bandwidth and very low noise. The use of 100% discrete, Pure Class A signal amplifiers give the serious music professional unlimited sonic character and a natural harmonic detail that enhances the program material and becomes one with the music itself. The Avalon Design AD2055 breathes life!


  • Pure Class A, 100% discrete design
  • Smooth musical detail and sonic excellence
  • Minimum audio signal path
  • Dual mono operation
  • Transparent active and passive filter design
  • High headroom +30dB Very low noise -94dB
  • Fully balanced inputs and outputs
  • DC coupled, no transformers in audio path
  • Switched frequencies in high and low bands
  • Mid bands use X10 frequency for extended range
  • Wide bandwidth -3dB 1Hz to 450kHz
  • Low distortion less than 0.5% THD and IMD
  • All signal routing with sealed silver relays Conductive plastic potentiometers for low noise
  • External 150W toroidal power supply 100% discrete power supplies for audio path
  • Long lasting, stainless steel hardware



Frequency Response: 1Hz-450kHz
Dynamic Range: >94dB
THD: Below 0.5%

Dimensions: 482mm x 88mm x 305mm
Weight: 13.6kg

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Avalon Design AD2055 Rear

Avalon Design AD2055 Music Equalizer Reviews

Have you owned this product? Let others know what you thought of it.

Community Score


(1 Review)

Build Quality 100%
Sound Quality 100%
Usefullness 100%
Mojo/Funk 50%
Reliability 100%

What other owners say...

Surgical EQ at it's best

By Steven

Build Quality 100%
Sound Quality 100%
Usefullness 100%
Mojo/Funk 50%
Reliability 100%

An equaliser should do nothing other than what is asked of it, and that is to alter the sonic qualities of the audio signal passing through it. It should not impart any character or alter the signal in any other way. The Avalon Design AD2055 does just that. Being a parametric equaliser, it is akin to a surgeons knife in it’s ability to fine tune a frequency to adjust.

There is plenty of scope in the available controls to correct any signal you desire, and it will do so flawlessly and without altering the signal with any retro character or noise being added. Yes it is a damn expensive bit of kit but you truly do get what you pay for and the Avalon Design AD2055 is worth ever cent!

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