Avalon Designs AD2022 Dual Mono Microphone/Instrument Preamplifer
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, improved high-voltage Class A regulated power supplies, two Hi-Z instrument inputs, variable-passive high pass filter and doubled plated circuit boards for superior low level signal transfer.
- Symmetrical Pure Class A design, two channels
- Microphone and hi-Z instrument inputs
- Selectable microphone input impedance matching
- Regulated phantom power supply +48v
- Ultra high quality, low-ratio, balanced input transformer
- Balanced, high-current Class A output to +36dB
- Large illuminated analogue VU meters and twin peak LED's
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The AD2022 incorporates the most advanced high-performance microphone transformer available. Split low-ratio primary windings are carefully combined within a custom mu-metal core for extended smooth frequency response and very low distortion. Sealer silver relays are used for minimal signal invasion. The input signal selector, high pass filter, polarity-phase reverse, +48v power and the 20dB input attenuator all utilise local sealed relay operation. A variable passive high pass filter provides a minimum phase shift design while eliminating low frequency rumble, wind noise and mechanical vibration at sub sonic frequencies.
Symmetrical Pure Class A Design
Two 100% discrete, high-voltage, symmetrical Pure Class A signal amplifiers are utilised per channel. The first operates in a cascaded-cascode FET configuration while the second stage amplifier is fully bipolar. The twin amplifiers share the total available gain requirement. This shared architecture increases the high level headroom capability, improves transient response and doubles the internal bandwidth of the ultra-high performance pure Class A signal amplifiers.
Output And Metering
High-current DC coupled, Class A discrete amplifiers are utilised for the output drive interface with +36dB capability into all known loads. Two large, high-quality analogue VU meters indicate accurate signal readings while bi-colour LED's offers peak indication at 0dB and +20dB.
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Specifications No On demo in store No stock message Ordered on request Brand Avalon Condition New
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