Avalon AD2077 Pure Class A Dual Mastering 4 band active-passive EQ  

Item #: 
1413580715901
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The sweet science - no, not pugilism, mastering. The art of mastering is a rarified skill, one that has made the careers of engineers whose names inspire something akin to reverence. Whether or not yo... Read More

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Overview

The sweet science - no, not pugilism, mastering. The art of mastering is a rarified skill, one that has made the careers of engineers whose names inspire something akin to reverence. Whether or not you are possessed of "big ears," the Avalon AD2077 makes your fingers more magical than they ever have been. A little cloudy around 2K? A little wooly on the bottom? No problem. The AD2077 has you covered.

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.

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.

Features
  • 100% discrete, pure class A mode
  • Wide bandwidth 1 Hz to 500kHz
  • High headroom (+30dB)
  • Passive and active filter design
  • Transparent minimal signal path
  • Very low noise (-94dB)
  • Balanced DC inputs and outputs
  • Hard wire silver relay bypass
  • Large custom rotary gold switches
  • Stepped slope control -vari Q
  • High resolution 0.5dB to 2dB stepped amplitude control with X2 range multipliers.
  • X10 frequency multipliers in the F2-F3 mid range bands
Specifications
  • Circuit Topology: High-voltage 100% discrete, 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)
Warranty
MANUFACTURER'S WARRANTY
One year parts and labor warranty. 90 day warranty for tubes.


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