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Avalon AD2022 Dual Mono Preamp

The AD2022 is Avalon's fourth generation of fully discrete, symmetrical Pure Class A microphone preamplifiers.

The dual mono AD2022 includes 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.

-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

AD2022 PREAMPLIFIER 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)



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