AD2077: Dual Mono, Pure Class A Mastering
Equalizer |
CLICK TO SEE ENLARGED
VERSION |
"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!
|
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 |
CLICK TO SEE ENLARGED
VERSION
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.
AD2077 SPECIFICATIONS |
Circuit
Topology |
High-voltage
100% discrete, balanced and symmetrical Class A Unity gain |
OutputGain Range |
Unity
Gain |
MaximumInput Level |
+30dB balanced
XLR pin 2 hot |
MaximumOutputLevel |
+32dB balanced
600 ohms, DC coupled, high-current discrete Class A |
Input /
Output Type |
XLR type, pin 2
hot balanced |
Noise
20kHzUnweighted |
-94dB (EQ
in) |
Distortion
THD, IMD |
0.5% (typical
0.05% at +6dB 1kHz) |
FrequencyResponse -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) | | |