Warm Audio WA-251 Large-Diaphragm Tube Condenser Microphone

BH #WA251 • MFR #WA-251
Warm Audio WA-251 Large-Diaphragm Tube Condenser Microphone
Key Features
  • Three Selectable Polar Patterns
  • Cardioid, Omnidirectional & Figure-8
  • Custom Brass CK12-Style Capsule
  • JJ 12AY7 Vacuum Tube
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The Warm Audio WA-251 is a large-diaphragm tube condenser microphone designed to provide the tonal characteristics of classic 251 microphones for vocalists, musicians, and recording engineers in home, project, and commercial recording studios. Thanks to three polar patterns—cardioid, omnidirectional, and figure-8—selectable from the included external power supply, its versatility allows it to excel on anything from close-up vocals to distant room sounds. It handles SPLs up to 132 dB with low distortion and noise, and produces a frequency response of 20 Hz to 20 kHz.
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Warm Audio WA-251 Overview

  • 1Description
  • 2Vintage-Style Microphone
  • 3Custom Capsule
  • 4JJ 12AY7 Vacuum Tube
  • 5CineMag Transformer
  • 6Carefully Selected Capacitors
  • 7Premium Tube Mic Cable

The Warm Audio WA-251 is a large-diaphragm tube condenser microphone designed to provide the tonal characteristics of classic 251 microphones for vocalists, musicians, and recording engineers in home, project, and commercial recording studios. Thanks to three polar patterns—cardioid, omnidirectional, and figure-8—selectable from the included external power supply, its versatility allows it to excel on anything from close-up vocals to distant room sounds. It handles SPLs up to 132 dB with low distortion and noise, and produces a frequency response of 20 Hz to 20 kHz.

The custom CK12-style capsule features brass construction and a gold-sputtered, 6-micron Mylar diaphragm with a single backplate. Tone-enhancing components, including a JJ 12AY7 vacuum tube, an American-made CineMag output transformer, and WIMA, Solen, and polystyrene capacitors, have been carefully selected to impart vintage-flavored tone characterized by a present high end and prominent low frequencies. Even the 7-pin cable, manufactured by Gotham Audio in Switzerland, rises to meet the demands of high-resolution audio production. It ensures the integrity of high frequencies and minimizes phase shift between the microphone and the power supply.

The WA-251 is supplied with a wood box and a shockmount, which reduces rumble and decouples it from problematic vibrations.

Vintage-Style Microphone

Engineered to pay homage to the classic 251 microphone of the 1960s while standing out on its own; ideal for vocals, drums, piano, strings, guitar, bass, brass/woodwind instruments, and more

Custom Capsule

Custom, all-brass, edge-terminated WA-12-B-60V capsule with a 24kt gold–sputtered, 6-micron NOS PET film (Mylar) diaphragm offers the tonality of the classic CK12 capsule with the reliability of modern components

JJ 12AY7 Vacuum Tube

Slovak Republic JJ 12AY7 vacuum tube imparts a characterful frequency response and contributes smoothness to the circuit

CineMag Transformer

American-made CineMag transformer helps provide the present top end and the large bottom end typically desired from a 251-style condenser mic

Carefully Selected Capacitors

Carefully selected capacitors include polystrene coupling capacitors, WIMA film capacitors, and an imported Solen capacitor on the output

Premium Tube Mic Cable

Includes a premium Gotham Audio GAC-7 tube microphone cable, which enhances top-end presence and reduces phase shift
UPC: 860191002128

Warm Audio WA-251 Specs

Microphone
Sound FieldMono
Operating PrinciplePressure Gradient
Pressure Operated
CapsuleCondenser
Polar PatternCardioid, Figure-8, Omnidirectional
Pattern SelectionSwitched
CircuitryTube
PadNone
High-Pass FilterNone
Performance
Frequency Range20 Hz to 20 kHz
Maximum SPL132 dB SPL
Impedance200 Ohms
Load Impedance2 Kilohms
Dynamic Range125 dB A-Weighted
Signal-to-Noise Ratio80 dB A-Weighted
Equivalent Noise Level12 dB A-Weighted
Connectivity
Output Connectors (Analog)1 x XLR 7-Pin (on Mic)
1 x XLR 3-Pin (on Power Supply)
Cable Length16.40' / 5 m
Power
AC Input Power (PSU)115 to 230 VAC, 50 / 60 Hz
Physical
Dimensionsø: 1.81 x L: 9.72" / ø: 46 x L: 247 mm
Packaging Info
Package Weight10.615 lb
Box Dimensions (LxWxH)19.2 x 14.1 x 5.7"
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