Warm Audio WA-47 Large-Diaphragm Tube Condenser Microphone

Warm Audio WA-47 Large-Diaphragm Tube Condenser Microphone

Warm Audio WA-47 Large-Diaphragm Tube Condenser Microphone

B&H # WA47 MFR # WA-47
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Warm Audio WA-47 Large-Diaphragm Tube Condenser Microphone

Warm Audio WA-47 Large-Diaphragm Tube Condenser Microphone

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Product Highlights

  • Nine Polar Patterns
  • K47-Style Capsule Reproduction
  • Gold-Sputtered, 6-Micron Mylar Diaphragm
  • TAB-Funkenwerk (AMI) Output Transformer
  • JJ 5751 Vacuum Tube
  • WIMA, Solen, and Polystyrene Capacitors
  • Gotham Premium 7-Pin Cable
  • Includes Wood Box and Shockmount
  • Includes External Power Supply
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Warm Audio WA-47 overview

  • 1Description

The Warm Audio WA-47 is a large-diaphragm tube condenser microphone designed to provide the tonal characteristics of classic U47 microphones for vocalists, musicians, and recording engineers in home, project, and commercial recording studios. Thanks to nine polar patterns—cardioid, omnidirectional, figure-8, and six intermediate patterns—selectable from the included external power supply, its versatility allows it to excel at anything from close-up vocals to distant room sounds.

The K47-style capsule reproduction features dual gold-sputtered, 6-micron Mylar diaphragms with a single backplate. Tone-enhancing components, including a JJ 5751 vacuum tube, TAB-Funkenwerk (AMI) output transformer, and WIMA, Solen, and polystyrene capacitors, have been carefully selected to impart vintage-flavored tone characterized by a smooth, uncompressed high end and strong, warm low frequencies. Even the 7-pin cable, manufactured by Gotham Audio in Switzerland, rises to meet the demands of uncompromised audio production. It ensures the integrity of high frequencies and minimizes phase shift between the microphone and the power supply.

The WA-47 ships with a wood box and a shockmount, which reduces rumble and decouples it from problematic vibrations.

Custom Capsule
The WA-47 utilizes a custom reproduction of the vintage K47-style capsule that was used in the classic U47 microphone—designed with the same hole pattern and frequency response. Warm Audio's version of this capsule (model WA-47-B-80v) is carefully manufactured by an Australian capsule manufacturer whose precision and consistency allows sonic replication of the most important piece of this classic style of microphone.
JJ Vacuum Tube
The JJ 5751 vacuum tube from the Slovak Republic is a lower gain, low-noise tube that forces much of the sonics of the capsule and transformer to be heard more significantly than some higher-gain tubes might allow. After auditioning four different tube brands, the folks at Warm Audio fell in love with the JJ 5751. Its frequency response and tonal contributions are smooth and vintage in nature.
AMI Transformer
The WA-47 utilizes an American-made TAB-Funkenwerk (AMI) USA transformer with imported large-core German laminations. This transformer helps provide the creamy smooth top end and the larger-than-life bottom end one would expect from a U47-style condenser microphone.
Premium Cable
One component of a tube microphone often overlooked is the 7-pin cable that connects the microphone to its power supply. When auditioning the WA-47 and other tube microphones, Warm Audio learned a lot about 7-pin cables and how the shielding and wire gauge can drastically change the sonic characteristics of a tube microphone. Warm Audio partnered with Gotham Audio in Switzerland to use their carefully built, premium 7-pin GAC-7 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 found in poorly built cables.
Tone-Impacting Capacitors
The WA-47 uses a polystyrene coupling capacitor for uncompressed top-end response from the capsule. WIMA film capacitors are present throughout and an imported Solen capacitor drives the TAB-Funkenwerk (AMI) USA output transformer.
UPC: 713541493117
In the Box
Warm Audio WA-47 Large-Diaphragm Tube Condenser Microphone
  • Wood Box
  • External Power Supply
  • Shockmount
  • Gotham 7-Pin GAC-7 Cable
  • IEC Cable
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Warm Audio WA-47 specs

    Analog Performance
    Sound Field Mono
    Operating Principle Pressure Gradient
    Transducer Condenser
    Tube Yes
    Polar Pattern Cardioid, Figure-8, Omnidirectional

    Six additional mixed polar patterns are also selectable via power supply

    Pattern Selection Switched
    Frequency Range 20 Hz to 20 kHz
    Signal to Noise Ratio 82 dB A-Weighted
    Equivalent Noise Level 10 dB A-Weighted
    Maximum SPL 140 dB SPL
    Pad None
    Impedance 200 Ohms
    Load Impedance 2 kOhms
    Sensitivity Not Specified by Manufacturer
    Low-Cut Filter None
    CMRR Not Specified by Manufacturer
    Dynamic Range 130 dB A-Weighted
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    Output Connectors 1 x 7-Pin XLR
    1 x 3-Pin XLR

    7-pin XLR on microphone
    3-pin XLR on power supply

    Cable Length 16.40' / 5 m

    Detachable Gotham GAC-7 cable

    Operating Voltage Not Specified by Manufacturer
    AC Input Power 115 to 230 VAC, 50 / 60 Hz
    Length 10.00" / 254 mm
    Diameter 3.54" / 90 mm
    Weight 9 lb / 4.08 kg

    Microphone, power supply, shockmount, and cables

    Packaging Info
    Package Weight 12.75 lb
    Box Dimensions (LxWxH) 19.0 x 13.7 x 5.7"

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