Avalon Design AD 2022 Overview
2 Channel Mic PreThe newest member of Avalon Design's AD2000 Series, the AD2022 is a two-channel, fully discrete solid-state microphone preamplifier. The AD2022 shares lineage with Avalon's M5 mic pre, though the AD2022 employs a fully balanced signal path and its maximum output level is higher than that of the M5.
Perhaps most intriguing, each channel of the AD2022 features a five-position rotary switch for adjusting the input impedance. A balanced input transformer allows the load to be matched to the particular microphone in use. Though this concept has been largely overlooked in modern mic preamp design, it's interesting to note that manufacturers such as RCA produced mic preamps specifically matched to load their microphones correctly. As of this writing there's only one other preamp I know of providing this feature (GT Electronics' VIPRE).
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- Summary: Two-channel, discrete Class-A microphone preamplifier with DI
- Strengths: Variable mic input impedance. Quiet. Transparent signal path. Excellent headroom. Easy operation.
- Weaknesses: Remote power supply. Manual needs to furnish more information regarding variable impedance settings.
- Maximum input gain 64 dB
- Noise level -102 dB, unweighted at 20 kHz
- Frequency range 1 Hz to 120 kHz
- Input impedance 50, 150, 600, or 1.5k ohms
- Distortion 0.05% nominal
