The first operates in a cascaded-cascode FET configuration while the second stage amplifier is fully bipolar. Two 100% discrete, high-voltage, symmetrical Pure Class A signal amplifiers are utilized per channel. 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. The input signal selector, high pass filter, polarity-phase reverse, +48v power and the 20dB input attenuator all utilize local sealed relay operation. Sealer silver relays are used for minimal signal invasion. Split low-ratio primary windings are carefully combined within a custom mu-metal core for extended smooth frequency response and very low distortion. The AD2022 incorporates the most advanced high-performance microphone transformer available. 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. The Avalon AD2022 Class A Dual Mono Microphone Preamp is Avalon's fourth generation of fully discrete, symmetrical Pure Class A microphone preamplifiers.
The Avalon AD2022 Microphone Preamp is a fully discrete, symmetrical pure Class A microphone preamplifier, offers selectable mic source loading for optimized cable/mic matching, improved high-voltage Class A power supplies, 2 Z instrument inputs, and low level signal transfer.
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