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- As of June 1, 2017 -
**THE AD2077 IS DISCONTINUED** |
AD2077:
Dual Mono, Pure Class A Mastering Equalizer |
CLICK
TO SEE ENLARGED VERSION
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"I rely on the AD2077 mastering equalizer for its incredible
depth and elegance. It is the most versatile EQ I've ever
used. The integrity of the stereo image is both wide and true
and the tonal range is extraordinary. I can achieve great
control in the bass, while keeping the midrange smooth and
precise...and the high-end air seems to go on forever!" -
Emily L., NY
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!
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AD2077
EQUALIZER FEATURES |
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Pure Class A, 100% discrete design
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Smooth musical detail and sonic excellence
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Minimum audio signal path
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Dual mono, fully switched controls
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Transparent active and passive filter design
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Very low noise -94dB
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High headroom +30dB
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Fully balanced inputs and outputs
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DC coupled, no transformers in audio path
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104 switched frequencies per channel
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Mid bands use X10 frequency for extended range
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Wide bandwidth -3dB 1Hz to 450kHz
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Low distortion less than 0.5% THD and IMD
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Switched range control 0.5dB, 1dB and 2dB steps
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All signal routing with sealed silver relays
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100% discrete power supplies for audio path
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External 150W toroidal power supply
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CLICK TO SEE
ENLARGED VERSION
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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.
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AD2077
SPECIFICATIONS |
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Circuit Topology
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High-voltage 100% discrete, balanced and symmetrical Class A
Unity gain
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Output
Gain Range
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Unity Gain
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Maximum Input Level
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+30dB balanced XLR pin 2 hot
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Maximum Output
Level
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+32dB balanced 600 ohms, DC coupled, high-current
discrete Class A
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Input / Output Type
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XLR type, pin 2 hot balanced
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Noise 20kHz
Unweighted
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-94dB (EQ in)
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Distortion THD, IMD
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0.5% (typical 0.05% at +6dB 1kHz)
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Frequency
Response -3dB
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1Hz to 450kHz (input band limited)
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Equalizer Type
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Passive high and low bands plus two fully
parametric mid bands
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Bypass
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Hard-wire relay bypass for equalizer L-R in-out plus silent opto
switch for seamless stereo bypass.
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Low Band F1
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Passive, switched amplitude to -20dB to +20dB in 0.5dB, 1dB or
2dB steps
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F1 Frequency Range
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shelf or peak-dip curve, switched 18, 25, 30, 50, 72, 100, 150,
200, 300, 400Hz
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Mid Band F2
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Active, switched amplitude to -10dB to +10dB in 0.5dB or 1dB
steps
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F2 Frequency Range
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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
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Mid Band F3
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Active, switched amplitude to -10dB to +10dB in 0.5dB or 1dB
steps
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F3 Frequency Range
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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
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High Band F4
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Passive, switched amplitude to -20dB to +20dB in 0.5dB, 1dB or
2dB steps,
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F4 Frequency Range
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shelf or peak-dip curve, switched 3k, 4k, 6k, 8k, 10k, 12k, 15k,
17k, 20k, 25kHz
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AC-DC Power
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External AC supply, 150w toroidal transformer, 4 pin cable 90v ac
isolated
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(B2T Power Supply Included)
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100-240v selectable 50/60Hz, 150w max
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Dimensions
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19 x 7 x 15 in (482 x 178 x 380mm)
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Shipping weight
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40lbs (13.6 kg)
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