The Avalon AD2077 Stereo Mastering Eq. Delivers great control in the bass, while keeping the midrange smooth and precise and everlasting high-end.
The Avalon 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 one of the most musically transparent analog EQ available today.
The main features of the Avalon AD2077 include:
- 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
- 104 switched frequencies per channel with peak-dip shelf selection for F1 low band and F4 high band
- X10 frequency multipliers in the critical F2-F3 mid range bands enhance the frequency selection from 12Hz to 22kHz
The main specifications of the Avalon AD2077 include:
- Circuit Topology: High-voltage 100% discrete, balanced and symmetrical 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)
