Avalon AD-2022
A dual-mono Class A preamp that engineers reach for when they want the microphone, not the box, to do the talking.
Overview
Avalon Design built its name on outboard that stays out of the way, and the AD-2022 is the two-channel expression of that philosophy. It is a fully discrete, solid-state microphone preamplifier — dual-mono, Class A, with a fully balanced signal path. The design shares its lineage with Avalon's M5 single-channel preamp/DI, but the AD-2022 runs balanced throughout and offers a higher maximum output level than its one-channel forebear. For anyone tracking a pair of microphones — a drum kit, a stereo acoustic guitar, two vocalists — that doubling is the whole reason the model exists.
The transparency is the point. In a survey of preamp choices, one trade publication grouped the AD2022 alongside the Earthworks 1022 and Grace Design m201 as examples of preamps whose signal path is "pristine enough that they pass your audio virtually untouched." That's the reputation the AD-2022 carries: it is not a color box. Engineers who want midrange grit reach for other designs; engineers who want the microphone's own character delivered intact reach for this one.
EQ (December 2000, p.98) reviewed the AD2022 as the newest member of Avalon's AD2000 Series, highlighting its adjustable input impedance as a key feature — the ability to match the preamp's load to a given microphone and cable rather than forcing a fixed impedance on every source. The same review noted the fully balanced topology and the higher output ceiling relative to the M5. Mix (February 2001, p.120) came at it from the other direction, with a reviewer who already owned a pair of M5s and treated the AD2022 as the natural two-channel upgrade — testing it first on vocals.
Practical details from the period documentation: two Hi-Z instrument inputs on the front panel, a variable passive high-pass filter, selectable impedance loading, improved high-voltage Class A regulated power supplies, and Teflon/silver point-to-point hand wiring. Outputs are both balanced and unbalanced. The front-panel instrument jacks matter more than they might appear — they let a guitarist or bassist plug straight in without a separate DI, which is part of why the AD-2022 turns up in project and commercial rooms alike.
On headroom, EQ (December 2000, p.100) reported plenty of it available from the AD2022 — the reviewer noted slamming the VU meter to the +2 or +3 level without trouble, and found that driving the preamp this way paid off in reduced noise introduced to the chain. That's the useful kind of headroom: not a spec-sheet bragging right, but a working margin that lets an engineer ride gain during a take without fear.
The AD-2022 shows up in real session documentation too. In one published vocal-chain breakdown, an Avalon AD2022 sat between the microphone and a Universal Audio 1176LN compressor, feeding Pro Tools at 96K — the kind of straightforward, high-quality front end the preamp was built for. Another studio gear list from the period names the AD 2022 among its processors alongside a UREI LA4. These aren't reviews; they're the paper trail of the unit doing its job in working rooms.
What the record does not supply is production years, original pricing, or a full factory specification set. Collectors and buyers should treat those as unconfirmed. What is well documented is the design intent and the reception: a clean, high-headroom, dual-mono Class A preamp with switchable impedance and front-panel instrument inputs, reviewed favorably by the trade press of its day and still cited as a reference for transparent tracking.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.