Warm Audio WA-251 Large-Diaphragm Tube Condenser Microphone (Demo, minor marks) is a used item in excellent condition, listed on Reverb. The asking price is £741. It is offered by Blackout Audio through Reverb. Local pickup is available. It is in our Microphones category. This listing is no longer listed on the shop; it may have sold or been withdrawn. Used Gear Hunter first saw this listing on 1 October 2026 and last saw it on 2 November 2026. It has been seen 16 times in our scans. Prices are converted from the seller's currency when we scan the listing, so the amount you pay may differ slightly. The seller sets shipping, and import duty or VAT may apply, so check the final cost and the item's details on Reverb before buying.
From the seller
Store demo unit with minor cosmetic marks.
The Warm Audio WA-251 is an all-vacuum-tube, large-diaphragm, transformer-balanced condenser microphone based on the classic ELA M 251. It uses a custom all-brass CK12-style capsule, a JJ 12AY7 vacuum tube, and a CineMag USA output transformer paired with WIMA, Solen, and polystyrene capacitors. Three polar patterns are selectable from the external power supply. The WA-251 is known for its controlled bass (with a built-in roll-off below 50 Hz), present midrange, and a smooth 5-10 kHz dip in cardioid mode that tames harshness on vocals, acoustic guitars, and other acoustic sources.
The built-in 50 Hz high-pass characteristic keeps the WA-251's low end tight in the mix rather than muddy or boomy. With most usable bass frequencies running from 60 to 250 Hz, the WA-251 captures lows and mids with definition. In cardioid mode, the 5-10 kHz dip smooths out the high end, making it forgiving on sibilant vocalists and bright acoustic instruments. This frequency shaping is inherent to the capsule and circuit design, not a switchable filter, giving the WA-251 its signature sound from the moment it is plugged in.
The CK12-style capsule, JJ 12AY7 tube, and CineMag USA transformer work together to deliver the warm, balanced tone that made the original 251-style microphone one of the most sought-after studio tools ever produced. Three polar patterns (cardioid, omnidirectional, and figure-8) provide flexibility for different recording setups and room acoustics.
Specifications
Type: Tube condenser
Capsule: WA-12-B-60V, edge-terminated, dual-backplate, all-brass CK12-style
Tube: JJ Slovak 12AY7
Transformer: CineMag USA
Polar patterns: Cardioid, omnidirectional, figure-8
Frequency response: 20 Hz to 20 kHz
Max SPL: 132 dB (<0.5% THD)
Output impedance: 200 Ohms
Self-noise: 12 dBA
S/N ratio: 80 dBA
Dynamic range: 125 dBA
Cable: Gotham 5 m GAC-7, 7-pin
Mic dimensions: 247 x 46 mm (9.72" x 1.81")
Total weight: 5.44 kg (12 lb) including PSU, shockmount, and cables
In the Box
WA-251 microphone
External power supply with IEC cable
Shockmount
Gotham 5 m 7-pin GAC-7 cable
Wood storage box
