Warm Audio JUDE: the Sound Techniques console preamp is back, 60 years on

On September 8th, Warm Audio finally revealed the product it had been teasing for days under the codename “JUDE”. This isn't another loose reinterpretation of a classic: it's an official collaboration with Sound Techniques, and a faithful reproduction of the mic preamp from the A-Range consoles designed by Geoff Frost. Two models make up the range: the single-channel JUDE-MP and the stereo JUDE-MP2.

Fourteen consoles, and a good chunk of the records you know

Sound Techniques started in Chelsea, founded by Geoff Frost and John Wood, who first kitted out their own studio before building desks for everyone else. Between 1964 and 1971, only fourteen A-Range consoles ever left the workshop. Fourteen — and they landed just about everywhere rock history was being written.

De Lane Lea at Kingsway came first, from 1965, home to the Are You Experienced? sessions with Hendrix, plus Fleetwood Mac, the Yardbirds and The Who. Then Sunset Sound, which in 1967 imported what is reported to be the first British recording console ever brought into the United States: Los Angeles tracked The Doors on it, and the mix of “When The Levee Breaks” went through it too. Trident followed in 1968, Elektra Sound Recorders the same year, and De Lane Lea Wembley in 1971. A System 12 even ended up in Kingston at Randy's, exactly as reggae was becoming a global music — Bob Marley cut the Catch a Fire sessions there.

That's where the name comes from. “Hey Jude” was recorded at Trident in 1968 on the studio's first eight-track A-Range. The same desks carried the White Album, Bowie's Hunky Dory and Ziggy Stardust era, Elton John's earliest recordings, “Keep Yourself Alive” and the mix of “Killer Queen”.

Z-Match, or why this preamp doesn't behave like the others

At the heart of the JUDE sits the dual-discrete 3035 Class-A gain stage, carried over from the original circuit. But Geoff Frost's real signature — the thing that separates an A-Range from a Neve or an API — is the impedance-matching circuit he called Z-Match.

In practice, the control offers nine positions: three input impedances (60 Ω, 200 Ω and 1.5 kΩ) crossed with three input gain settings (−15, −7 and 0 dB). This isn't a gimmick. The way a microphone “sees” the preamp's input impedance changes its frequency response, its transient behaviour and its harmonic character — a ribbon doesn't react like a dynamic, and a tube condenser reacts differently again. Those nine combinations therefore deliver nine genuinely distinct characters from a single microphone, making the JUDE a preamp you tune to the source rather than one with a single fixed colour.

The rest of the build follows the same logic: custom-spec CineMag USA and nickel transformers, Wima and Nichicon capacitors, carbon resistors and hand-wired construction. Every unit is hand-tested at Warm Audio's Austin, Texas facility and covered by the brand's five-year warranty.

The numbers

• Gain: 65 to 76 dB
• Frequency response: 10 Hz – 25 kHz
• Gain stage: dual-discrete 3035, Class A
• Z-Match: 9 positions — 60 Ω / 200 Ω / 1.5 kΩ impedance, −15 / −7 / 0 dB input gain
• Transformers: custom CineMag USA and nickel
• Formats: JUDE-MP (1 channel), JUDE-MP2 (2 channels)

What it's for, in 2026

Warm Audio leads with vocals, and for good reason: the A-Range character is known for placing a voice out in front of the mix without any harshness up top. But Z-Match reaches well beyond that one use case. On acoustic guitar, switching impedance lets you pick between a woody, midrange-forward tone and a more open attack; on piano, it dials in how much percussion you keep; on a guitar amp captured with a ribbon, it finds bite without touching an EQ.

More prosaically, it's also one of the few ways to get at this particular circuit. The fourteen original consoles have largely been broken up, scattered or absorbed into collections, and the modules that surface on the used market go for figures that bear no relation to a new rack unit.

Price and availability

The single-channel JUDE-MP is announced at $749 and the stereo JUDE-MP2 at $1,399 (US MSRP, excluding tax). Both are available now from Warm Audio. Official euro pricing had not been announced at the time of writing — we'll update this article as soon as it is.