Warm Audio WA-251 Large Diaphragm Tube Condenser Microphone - Long & McQuade Music Educator Site
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Warm Audio WA-251 Large Diaphragm Tube Condenser Microphone

Departments > Pro Audio & Recording > Microphones > Mics - Large Diaphragm Condensor > Warm Audio > WA-251 Large Diaphragm Tube Condenser Microphone
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The WA-251 is an all vacuum tube, large diaphragm, transformer balanced, multi-pattern, large condenser microphone, based on the classic '251 that has been used on countless hit records for the last 50+ years. The WA-251 is designed for pro studio, home studio, live, and broadcast applications and sounds great on vocals, acoustic/electric guitars, acoustic/electric bass, drums, piano, strings, brass/woodwind instruments, and an array of other sources.

The WA-251 offers a classic microphone design to a new generation of recording artists at an affordable price.


All Brass Capsule
The WA-12-B-60V is an all-brass, edge-terminated capsule that captures all the smoothness, rich top end, and warm vintage sonics of the original CK12 capsule. The diaphragm is 24k gold sputtered 6 micron, NOS PET film (mylar). The end result is a very consistent, reliable capsule which matches the frequency response and tonality of the classic 1970's classic capsule.

The Transformer
The WA-251 utilizes an American made CineMag USA transformer. This transformer helps provide the present top end and the large bottom end one would hope to get from a 251-style condenser microphone.

The Tube
A Slovak Republic JJ 12AY7 vacuum tube is used in the WA-251. The frequency response of the JJ tube, and the way it contributes to the circuit is tonally smooth and vintage in nature.

The Capacitors
The WA-251 proudly uses polystyrene coupling capacitors, wima film capacitors throughout, and an imported Solen French capacitor on its output.

The Cable
Warm audio partnered with Gotham Audio in Switzerland to use their very carefully built high-end 5 meter GAC-7, 7-pin Tube Microphone Cable. Using this cable increases top end presence and the overall size of the recorded image in the stereo field by reducing phase shift and the parasitic effect often experienced in poorly built cables. Gotham Cabling is very expensive and boutique in nature and shouldn't be considered a small addition to the WA-251 package.


• Wima, Solen French, and Polystyrene Capacitors
• Polar Patterns: 3 Patterns - Cardioid, Omni, Figure-Of-Eight
• Frequency Range: 20 Hz to 20 kHz
• Output Impedance: 200 Ohms
• Maximum SPL: 132Db (< 0.5% THD)
• Rated Load Impedance: >= 2 kOhms
• S/N Ratio: 80 dBA
• Equivalent Noise: 12dBA (IEC651)
• External IEC Grounded PSU
• Total Weight (Mic, PSU, Shockmount, Cables) - 12 lbs
• Mic Dimensions: 247mm X 46mm
• Dynamic Range: 125dBA
• Includes: Microphone, Wood Box, PSU, Shock-Mount and Gotham Cable.
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Beck Black - "Don't Call Me Darlin'" WA-251 Tube Condenser Microphone
L&M @ NAMM 2019: Warm Audio Microphones
Description: Bryce from Warm Audio shows the new WA-251 tube condenser microphone and WA-84 small diaphragm condenser mics at NAMM 2019.