Avalon AD-2077 - Mastering Equalizer  From Avalon

The pinacle of Stereo Mastering EQ's, this is the top of the EQ food chain!

Avalon Design

What We Think

This is an unequalled monster quality mastering EQ, designed for the most discriminating ears. We don't exactly move a ton of these because of the price point, but the second you patch it in, you'll know where every dollar went! For those who can't make the stretch, the Avalon AD2055 EQ suprises a lot of people by just how close it comes to the performance of the 2077. If complete lack of compromise is a must, look towards the 2077, otherwise, if budget is a concern, the 2055 will really do you well!

Manufacturer's Description from Avalon

The AD2077 mastering equalizer is an ultraistic design optimizing absolute signal integrity. Design features include 100% discrete pure class A signal amplifiers, state-of-the-art passive and active filter topologies and a DC coupled minimalist signal path. These unique designs offer the professional mastering engineer alternate tone selections in both filter domains while delivering the highest resolution and wide dynamic range with very low noise. Custom gold rotary switches give accuracy in 0.5dB, 1dB and 2dB steps. 104 switched frequencies per channel with X I0 range selectors provide frequency selections from 12Hz to 25kHz at 1/4 octave intervals. The Avalon AD2077 mastering equalizer is the most musically transparent analog EQ available today!
 

AD2077 EQUALIZER FEATURES:

  • Pure Class A, 100% discrete design
  • Smooth musical detail and sonic excellence
  • Minimum audio signal path
  • Dual mono, fully switched controls
  • Transparent active and passive filter design
  • Very low noise -94dB
  • High headroom +30dB 
  • Fully balanced inputs and outputs
  • DC coupled, no transformers in audio path
  • 104 switched frequencies per channel
  • Mid bands use X10 frequency for extended range
  • Wide bandwidth -3dB 1Hz to 450kHz
  • Low distortion less than 0.5% THD and IMD
  • Switched range control 0.5dB, 1dB and 2dB steps
  • All signal routing with sealed silver relays 
  • 100% discrete power supplies for audio path
  • External 150W toroidal power supply
 

SONIC EXCELLENCE

The Avalon AD2077 Pure Class A mastering equalizer is the most advanced, low noise, fully switched parametric equalizer available today. Designed for absolute signal integrity and musical performance, the AD2077 combines the best active and passive filter topologies for sonic excellence unequaled by lesser designs.  The AD2077 is the perfect solution for two buss music-program equalization and ultra-high performance analog mastering applications. 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 EQ filters. This special combination enables the AD2077 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 favorite with music lovers around the world . . . full bodied, powerful (up to +/-20dB, 40dB  range !) and sweet frequency selections are the benefits of the passive high-low EQ bands. The full bandwidth twin mid bands provide switched frequency selection (X10 frequency multipliers for very wide range), switched Q (width) and amplitude control. 
 

MINIMUM SIGNAL PATH DESIGN

Avalon's 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 mastering engineer unlimited sonic character and a natural harmonic detail that enhances the program material and becomes one with 
the music itself.
Avalon Design

About Manufacturer

Wynton R. Morro founded Avalon with the desire to bring the art of music recording closer to the essence of the original performance. Avalon's pure Class A recording systems provide the world's leading engineers, producers and musicians with state-of-the-art electronics designed especially for high-fidelity music and sound recording, These carefully engineered systems enhance the creative senses and become one with the music itself. Avalon systems utilize 100% discrete, high-bias pure Class A audio amplifiers. These pure Class A amplifiers are incorporated into minimal signal path designs which include sealed silver relays, balanced DC coupled high-current "outside-world" drivers, fully discrete linear DC regulators, low noise toroidal power transformers and selected high quality active and passive components. This powerful combination of design features gives increased musical headroom and greater dynamic transient capability for a truly transparent audio passage. Avalon's unique design features, highest quality components and continued pursuit of sonic excellence assures the most harmonious musical signal transfer available today. Whether you are recording a solo vocalist, capturing the delicate nuance of an acoustic instrument, mastering music and film productions or recording symphonies, let Avalon take you to the leading edge in analog and experience sonic reality like never before!

Specifications

AD2077 SPECIFICATIONS

Circuit Topology

High-voltage 100% discrete, balanced and symmetrical Class A Unity gain

Output Gain Range

Unity Gain

Maximum Input Level

+30dB balanced XLR pin 2 hot

Maximum Output Level

+32dB balanced 600 ohms, DC coupled, high-current discrete Class A

Input / Output Type

XLR type, pin 2 hot balanced

Noise 20kHz Unweighted

-94dB (EQ in)

Distortion THD, IMD

0.5% (typical 0.05% at +6dB 1kHz)

Frequency Response -3dB

1Hz to 450kHz (input band limited)

Equalizer Type

Passive high and low bands plus two fully parametric mid bands

Bypass

Hard-wire relay bypass for equalizer L-R in-out plus silent opto switch for seamless stereo bypass.

Low Band F1

Passive, switched amplitude to -20dB to +20dB in 0.5dB, 1dB or 2dB steps

F1 Frequency Range

shelf or peak-dip curve, switched 18, 25, 30, 50, 72, 100, 150, 

200, 300, 400Hz

Mid Band F2

Active, switched amplitude to -10dB to +10dB in 0.5dB or 1dB 

steps

F2 Frequency Range

Switched 12, 15, 18, 21, 25, 30, 36, 42, 50, 60, 70, 84, 100, 

120, 140, 170, 200, 240, 280, 340, 400Hz, (x10) 120, 150, 180, 210, 250, 300, 360, 420, 500, 600, 700, 840, 1k, 1k2, 1k4, 1k7, 2k, 2k4, 2k8, 3k4, 4kHz Q (width) switched 5 positions 6, 9, 12, 15, 18dB per octave

Mid Band F3

Active, switched amplitude to -10dB to +10dB in 0.5dB or 1dB steps

F3 Frequency Range

Switched 140, 160, 180, 210, 250, 300, 350, 420, 500, 600, 700, 840, 1k, 1k2, 1k4, 1k5, 1k6, 1k8, 2k, 2k2, 2k4, (x10) 1k4, 1k6, 1k8, 2k1, 2k5, 3k, 3k5, 4k2, 5k, 6k, 7k, 8k4, 10k, 12k, 14k, 15k, 16k, 18k, 20k, 22k, 24kHz Q (width) switched 5 positions 6, 9, 12, 15, 18dB per octave 

High Band F4

Passive, switched amplitude to -20dB to +20dB in 0.5dB, 1dB or 2dB steps,

F4 Frequency Range

shelf or peak-dip curve, switched 3k, 4k, 6k, 8k, 10k, 12k, 15k, 17k, 20k, 25kHz

AC-DC Power

External AC supply, 150w toroidal transformer, 4 pin cable 90v ac isolated

(B2T Power Supply Included)

100-240v selectable 50/60Hz, 150w max

Dimensions

19 x 7 x 15 in (482 x 178 x 380mm)

Shipping weight

40lbs (13.6 kg)

Downloads

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Name

Description

Manual