Avalon Design AD2077 Dual Mono Mastering Equalizer (Black)

Avalon Design AD2077 Dual Mono Mastering Equalizer (Black)

Avalon Design AD2077 Dual Mono Mastering Equalizer (Black)

B&H # AVAD2077BL MFR # AD2077-BL
Avalon Design AD2077 Dual Mono Mastering Equalizer (Black)

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  • 1Description

The black AD2077 Dual Mono Mastering Equalizer from Avalon Design is designed to provide accurate equalization with minimal coloration, making it suited for mastering and mixing applications. It features 100% discrete pure class A signal amplifiers, passive and active filter topologies, and a DC-coupled minimalist signal path. This design offers you alternate tone selections in both filter domains while delivering high resolution and wide dynamic range with low noise.

Custom gold rotary switches give accuracy in 0.5, 1, and 2 dB steps. The 104 switched frequencies per channel with x10 range selectors provide frequency selections from 12 Hz to 25 kHz at 1/4 octave intervals.

The Avalon AD2077 Mastering Equalizer is an advanced, low-noise, fully switched parametric equalizer. Designed for absolute signal integrity and musical performance, this equalizer combines the best active and passive filter topologies for sonic excellence. This special combination enables the AD2077 Equalizer to deliver high-speed transient detail for real-world equalization demands. The passive high and low bands offer alternate musical tone range to the full-function active parametric mid bands.

The full-bandwidth twin mid bands provide variable frequency selection (x10 frequency multipliers for very wide range), switched Q, and amplitude control.

The AD2077 Equalizer is a suitable solution for 2-buss music-program equalization and ultra-high performance analog mastering applications.

The advanced true-symmetry design offers high voltage, large headroom, extended bandwidth, and very low noise. The use of 100% discrete, Class A signal amplifiers gives sonic character and a natural harmonic detail that can enhance the program material.

Class A, 100% discrete design
Minimum audio signal path
Dual mono, fully switched controls
Transparent active and passive filter design
-94 dB of noise
30 dB of headroom
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 of -3 dB, 1 Hz to 450 kHz
Low distortion of less than 0.5% THD and IMD
Switched range control of 0.5, 1, and 2 dB steps
All signal routing with sealed silver relays
100% discrete power supplies for audio path
External 150W toroidal power supply
Passive high and low bands plus 2 fully parametric mid bands
Hard-wire relay bypass for equalizer L-R in-out plus silent opto switch for seamless stereo bypass
In the Box
Avalon Design AD2077 Dual Mono Mastering Equalizer (Black)
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Circuit 100% discrete, balanced, and symmetrical Class A
    Output Gain Unity
    Maximum Input Level 30 dB balanced XLR pin 2 hot
    Maximum Output Level 32 dB balanced 600 Ω, DC coupled, high-current discrete Class A
    Input/Outputs XLR type, pin 2 hot balanced
    Noise 20 kHz Unweighted: -94 dB (EQ in)
    Distortion (THD) IMD: 0.5% (Typical 0.05% at 6 dB 1 kHz)
    Frequency Response 1 Hz to 450 kHz (Input band limited) at -3 dB
    Equalizer Passive high and low bands plus 2 fully parametric mid bands
    Bypass Hard-wire relay bypass for equalizer L-R in-out plus silent opto switch for seamless stereo bypass
    Band Low Band F1: Passive, switched amplitude to -20 to +20 dB in 0.5, 1, or 2 dB steps
    Mid Band F2: Active, switched amplitude to -10 to +10 dB in 0.5 or 1 dB steps
    Mid Band F3: Active, switched amplitude to -10 to +10 dB in 0.5 or 1 dB steps
    High Band F4: Passive, switched amplitude to -20 to +20 dB in 0.5, 1, or 2 dB steps
    Frequency Range F1: Shelf or peak-dip curve, switched 18, 25, 30, 50, 72, 100, 150, 200, 300, and 400 Hz
    F2: Switched 12, 15, 18, 21, 25, 30, 36, 42, 50, 60, 70, 84, 100, 120, 140, 170, 200, 240, 280, 340, 400 Hz, (x10) 120, 150, 180, 210, 250, 300, 360, 420, 500, 600, 700, 840, 1,000, 1,200, 1,400, 1,700, 2,000, 2,400, 2,800, 3,400, 4,000 Hz Q (width) switched 5 positions 6, 9, 12, 15, 18 dB per octave
    F3: Switched 140, 160, 180, 210, 250, 300, 350, 420, 500, 600, 700, 840, 1,000, 1,200, 1,400, 1,500, 1,600, 1,800, 2,000, 2,200, 2,400, (x10) 1,400, 1,600, 1,800, 2,100, 2,500, 3,000, 3,500, 4,200, 5,000, 6,000, 7,000, 8,400, 10,000, 12,000, 14,000, 15,000, 16,000, 18,000, 20,000, 22,000, 24,000 Hz Q (width) switched 5 positions 6, 9, 12, 15, 18 dB per octave
    F4: Shelf or peak-dip curve, switched 3, 4, 6, 8, 10, 12, 15, 17, 20, and 25 KHz
    Power External AC supply, 150 W toroidal transformer, 4-pin cable 90 VAC isolated
    Power Supply 100 to 240 V selectable 50 / 60 Hz, 150 W maximum
    Dimensions 19 x 7 x 15" (482 x 178 x 380 mm)
    Weight 23.0 lb (10.4 kg)

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