Avalon AD 2022 Dual Class A Mic Pre Amplifier

Avalon AD 2022 Dual Class A Mic Pre Amplifier

The Avalon AD-2022 is the fourth generation of fully discrete, symmetrical Pure Class A microphone preamplifiers. This dual mono mic pre features the original sonic capabilities and transparency of the M2, M22 and M5 preamplifiers. Plus several additional features, including selectable microphone source loading for optimized cable/mic matching, improved high-voltage Class A regulated power supplies, two high Z instrument inputs, variable-passive high pass filter, quality/silver wiring and doubled plated circuit boards for superior low level signal transfer.

Avalon AD2022 Features

• Symmetrical Pure Class A design, two channels
• Microphone and hi-Z instrument inputs
• Gain switched 4dB steps plus +/- 3dB fine output trim
• Selectable microphone input impedance matching
• Low noise -126dB EIN
• Ultra high quality, low-ratio, balanced input transformer
• Balanced, high-current Class A output to +36dB
• Large illuminated analog VU meters and twin peak LED's
• Regulated phantom power supply +48v
• Input polarity phase reverse
• High headroom +36dB input before overload
• Input -20dB pad for high level signals
• Sealed silver relays for all signal routing
• External AC 150w toroidal power chassis
• Fully discrete Class A regulated audio power supplies
• Deep, musical sound-stage, transparent amplification

Specifications

• Circuit Topology: Twin cascode FET and bipolar low level signal amplifiers, high-voltage, 100% discrete, symmetrical Pure Class A
• Input Type and Load: Transformer balanced low-ratio, 50, 150, 600 and 1k5 ohm input load selection
• Maximum Mic Level: +36dB balanced XLR pin 2 hot (with -20dB passive attenuator)
• Maximum Instrument Level: +18dB at 100k ohms instrument input level, standard mono 1/4 inch jack
• Input Attenuator: -20dB resistive pre transformer primary, sealed silver relay
• Phantom Power: +48v regulated 50mA capability, sealed silver relay
• High Pass Filter: Passive, variable from 30Hz to 185Hz @ 6dB per octave, sealed silver relay.
• Polarity Reverse: Sealed silver relay on microphone input
• Gain Range Input: +20dB to +64dB in 4dB steps
• Gain Output Range: +/- 3dB variable conductive plastic potentiometer
• Maximum Output Level: +36dB balanced 600 ohms, DC coupled, discrete symmetrical Pure Class A
• Output Type: XLR connector, pin 2 hot
• Noise EIN Unweighted: -126dB 150 ohm
• Noise 20kHz Unweighted: -102dB
• Distortion THD, IMD: 0.05% nominal
• Frequency Response -3dB: 1Hz to 120kHz transformer limit
• System Bandwidth: DC to 1MHz
• Output Meter: High quality, illuminated analog VU meter 0dB = +4dB.
• Peak Meter: Bi-color LED's 0dB and +20dB peak detection circuit.
• AC power supply B2T: External toroidal 100V to 240V, 50-60Hz selectable, 150 watts maximum.
• Cables: 90V ac, 4 pin male power input connector, B2T required, internal DC regulation
• Dimensions: 19 x 12 x 3.5 in (482 x 305 x 89mm)
• Weight: 15lbs (6.8kg)
• Dimensions - Shipping Carton: 24 x 21.5 x 7.5 in (610 x 546 x 190mm)
• Weight - Packed: 25lbs (11.4kg)