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- As of May 1, 2017 -
**THE AD2055 IS DISCONTINUED**
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AD2055:
Dual Mono, Pure Class A Parametric Music Equalizer |
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"The AD2055 is the best EQ I've ever heard.
Having the cleanest low and low-mid frequencies, combined with the
most open top-end makes this my favorite tool in the studio. I personally
use five of these on all of my mixes." John G., CA
"The
AD2055 in my opinion is the best stereo EQ on the market. Possibly
the best ever made. I like it because it has a very natural, musical
sound. Particularly noticeable are the clear open high frequencies
and warm lows. I use it on whatever is most important in the mix.
Sometimes it's the lead vocal, sometimes the mix buss itself. It
has saved a lot of records." Rob C., CA
The
AD2055 combines 100% discrete, pure class A signal amplifiers with
state-of- the-art passive and active filter topologies. The AD2055's
unique circuitry delivers very high resolution transient detail
at the operational extremes of real world equalization demands.
The AD2055 auto-bias DC servo loop control eliminates the need for
all interstage capacitor coupling. The AD2055 breathes life into
all musical performances!
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AD2055
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 operation
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Transparent
active and passive filter design
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High
headroom +30dB Very low noise -94dB
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Fully
balanced inputs and outputs
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DC
coupled, no transformers in audio path
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Switched
frequencies in high and low bands
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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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All
signal routing with sealed silver relays Conductive plastic
potentiometers for low noise
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External
150W toroidal power supply 100% discrete power supplies for audio path
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Long
lasting, stainless steel hardware
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CLICK TO SEE
ENLARGED VERSION
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SONIC EXCELLENCE
The Avalon AD2055 Pure Class A music equalizer is the most powerful, low
noise parametric equalizer available today. Designed to optimize absolute signal
integrity and musical performance, the AD2055 combines the best of active and
passive filter topologies with sonic excellence unequaled by lesser designs. The
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 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
favorite 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 AD2055 breathes life!
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AD2055
SPECIFICATIONS |
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Circuit Topology
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High-voltage 100% discrete, balanced and
symmetrical Class A
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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 in-out
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Low Band F1
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Passive, amplitude to -32dB to +32dB shelf or
peak-dip curve
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F1 Frequency Range
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Switched 10 position 18Hz, 25, 30, 50, 72, 100,
150, 215, 300, 450Hz
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Mid Band F2
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Active, amplitude to -16dB to +16dB peak-dip
curve
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F2 Frequency Range
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Variable 35Hz to 450Hz (x10) 350Hz to 4k5Hz, Q
(width) 0.3 to 3.0
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Mid Band F3
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Active, amplitude to -16dB to +16dB peak-dip
curve
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F3 Frequency Range
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Variable 160Hz to 2k0Hz (x10) 1k6Hz to 20kHz, Q
(width) 0.3 to 3.0
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High Band F4
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Passive, amplitude to -26dB to +26dB shelf or
peak-dip curve
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F4 Frequency Range
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Switched 10 position 1k5Hz, 2k5, 3k5, 5k, 7k2,
10k, 12k5, 15k, 20k, 25kHz
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AC-DC Power
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External AC supply, 150w toroidal transformer, 4
pin cable 90v 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 3.5 x 12 in (482 x 88 x 305mm)
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Shipping weight
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30lbs (13.6 kg)
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