Warm Audio WA-47jr

The WA-47jr is an FET transformerless version of the highly renowned classic ‘47 microphone that has been used on countless hit records for the last 50+ years. The WA-47jr is fully discrete, has 3 polar patterns and is designed for pro studio, home studio, live, and broadcast applications. The WA-47jr sounds great on vocals, acoustic/electric guitars, acoustic/electric bass, drums, piano, strings, brass/woodwind instruments, and an array of other sources.

The WA-47jr proudly utilizes a custom k47 style capsule reproduction, designed with the same hole pattern and frequency response as the vintage design.  Our version of this capsule (model# WA-47-B-80v) is carefully manufactured by an Australian capsule manufacturer with careful precision and repeat-ability that allows the most important sonic piece of the classic mic to be heard and influence the tone and signature of the WA-47jr.  The WA47jr's low-noise and discrete signal path, when paired with this excellent true '47 style capsule, allows it to obtain a very similar tone to the classic ‘47 microphone, but at a much lower price tag.  The WA-47jr utilizes the same k47 style capsule found in our flagship WA-47 tube condenser microphone.

The WA-47jr circuit uses high quality Toshiba FET’s, Wima film capacitors and Panasonic electrolytic capacitors.  The circuit is modernized and more simple than the classic ‘47 tube microphone, but the components and circuitry are top-notch, and have a sound quality and tone that punches far above anything we’ve ever heard in this price range.

We at Warm Audio are very excited to bring this ‘47 style FET condenser microphone and classic tone to the market at such an affordable price.  We feel confident that you will enjoy a lifetime of beautiful recordings with the WA-47jr.

The WA-47jr proudly utilizes a custom k47 style capsule reproduction, designed with the same hole pattern and frequency response as the vintage part.  Our version of this capsule (model# WA-47-B-80v) is assembled with precision by an Australian capsule manufacturer.  The WA47jr's low-noise and discrete signal path then paired with an excellent true '47 style capsule allows this mic to obtain a very similar tone to the classic ‘47 microphone at a much lower price tag.

The Warm Audio WA-47-B-80v capsule is also used in our flagship WA-47 tube condenser microphone.

Born Out Of Need

When designing our first microphone we knew that the single greatest challenge would be to offer a capsule that was built to a high standard and priced in a range that every-day musicians and engineers could afford. We already knew where to find great microphone transformers, precision resistors, polystyrene, tantalum and WIMA film capacitors; but we came to realize that a quality affordable microphone capsule that met our specifications simply wasn’t out there. We knew we would have to develop our own line of capsules.

The WA (Warm Audio) brand of capsule is the result of several years of research, a lifetime of listening, and a passion for great sound. Above all else, Warm Audio capsules came from the desire to give customers far more quality/value than what they are used to getting in an affordable microphone. Every Warm Audio capsule is made in the same small assembly house in a clean-room environment, and packaged in its own protective jewel case until the moment it is loaded into the microphone. Every capsule visually inspected and electrically tested for imperfections. Every capsule is also made with all brass parts (no teflon or other cost saving material), and is carefully skinned from the same supply of high purity NOS Mylar (PET film). We are confident that you will be just as pleased with our microphone capsules as we are to offer them, and that they will give you a lifetime of great recordings and enjoyment.

Technical Specifications

• FET Transformerless '47 Style Condenser Microphone.

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• Custom True '47 Capsule Reproduction (K47 Style)
  Model# WA-47-B-80v.

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• Capsule Makeup: Gold Sputtered, Dual Large Diaphragm, Single Backplate, 6 Microns NOS Mylar (PET Film).

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• Polar Patterns: Cardioid, Figure-Of-Eight, And Omnidirectional.

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• Pad: -10db

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• High-Pass Filter: 70Hz

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• Self-Noise: 9dBA

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• Dynamic Range: 138dBA

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• Fully Discrete Signal Path, Toshiba FET’s, Wima Film Capacitors, Panasonic Electrolytic Capacitors

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• Maximum SPL: 147/157dB (@1kHz 1kOhms 0.5% THD, 0/-10dB)

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• Frequency Range: 20 Hz~20 KHz

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• Sensitivity: 10mV/Pa Or -40dB

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• Output Impedance: 100 Ohms

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• Rated Load Impedance: ≥1kOhms

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• Equivalent Noise: 10dBA (IEC651)

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• Total Weight: 1.1 Lbs

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• Mic Diameter: 52mm

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• Mic Length: 210mm

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• Includes: Shockmount, Hard Mount, Zipper Storage Pouch

Cardioid Frequency Chart

Figure 8 Frequency Chart

Omni-Directional Frequency Chart