Skip Navigation Website Accessibility
Five Star Guitars Logo

Warm Audio WA-47jr LDC Microphone

WA-47jrTransformerless FET Condenser Microphone - Nickel

WA-47jr Transformerless FET Condenser Microphone - Nickel: Contemporary Version of the Popular '47-Style Studio Mic

The WA-47jr is a contemporary multi-pattern, transformerless, FET condenser mic designed to deliver the sound profile of the coveted '47-style tube microphone at an unthinkable price. Like the original vintage U47 tube microphone, the 47jr features a proper large-diaphragm 34mm K-47-style capsule. This capsule is so revered for its ability to capture detail with analog depth that it has been used as the basis for several ultra-unattainable microphone designs of the last half-century. Combining possibly the greatest condenser capsule of all time with our carefully crafted, modern circuit delivers that analog warmth and pristine detail for capturing everything from vocals to toms to acoustic guitar. With three polar patterns, a -10dB pad, and a 70Hz Hi-Pass filter, the WA-47jr will easily become the most versatile mic in your locker.

Past, Meet Present

The WA-47jr is equally at home in a project studio or in a world-class live room run by Grammy-nominated engineers. Achieving the sound profile of the WA-47jr requires honoring the past and embracing the present. The heart of the WA-47jr is the custom gold-sputtered, dual large-diaphragm, single backplate K47-style capsule. The premium Toshiba FETs in the WA-47jr allow even more top-end information compared to the original U47-style tube microphone, making the WA-47jr more pristine in the upper register. Boutique-grade polystyrene, Panasonic electrolytic, and WIMA film capacitors are used throughout the WA-47jr, allowing for exceptional signal transfer throughout the microphone. Finally, the WA-47Jr wouldn’t be a Warm Audio product if it wasn’t a completely discrete signal path, no ICs here - just real-deal analog circuitry!

Elite Versatility, Vintage Sound

Recording quality audio often means that different artists, songs, and parts require different treatment during the recording process. The WA-47jr is a highly adaptable and versatile professional studio microphone. Whether it’s vocals, drums, guitar cabs, acoustic guitars, strings, overheads, horns, bass cabs, there’s likely a part out there where the WA-47jr will excel and bring the sound in your head to life. Here are just a few ways that engineers and artists have used the WA-47jr to achieve fantastic results.

Premium Components - Elite Build Quality - Superior Sound

The WA-47-B-50v capsule is a true reproduction of the large, dual-diaphragm K47-style capsule and the same capsule in the award-winning WA-47 tube microphone. This capsule captures authentic analog detail across the 20Hz-20kHz frequency response. With the warmth of the capsule combined with extra top-end information from the FET, the WA-47jr will be right at home on many sources. The WA-47jr uses premium Toshiba transistors that deliver professional audio fidelity. The WIMA film capacitors and Panasonic electrolytic capacitors in the WA-47jr provide critical signal conversion, allowing the 47jr to get the full benefit of the K47-style capsule with the added top-end boost from the Toshiba FETs.

Patterns, Pads, & Filters

The WA-47jr is a multi-pattern mic with available cardioid, omnidirectional, and figure-8 patterns. A selectable -10dB pad allows the 47jr to handle SPLs up to 157dBs making capturing loud sources easy. Engaging the 70 Hz Hi-Pass filter helps filter unwanted bass rumble and noise at the source instead of playing with potentially tone-destructive EQ during the mixing process. The WA-47jr is encased in an ultra-durable nickel-plated brass body. Every single WA-47jr is meticulously hand-inspected at Warm HQ in Austin, TX by real musicians and engineers with a passion for superior sound.


  • FET Transformerless '47 Style Condenser Microphone
  • Custom True '47 Capsule Reproduction (K47 Style)
  • Model# WA-47-B-80v
  • Capsule Makeup: Gold Sputtered, Dual Large Diaphragm, Single Backplate, 6 Microns NOS Mylar (PET Film)
  • Polar Patterns: Cardioid, Figure-Of-Eight, And Omnidirectional
  • Pad: -10db
  • High-Pass Filter: 70Hz
  • Self-Noise: 9dBA
  • Dynamic Range: 138dBA
  • Fully Discrete Signal Path, Toshiba FETs, Wima Film Capacitors, Panasonic Electrolytic Capacitors
  • Maximum SPL: 147/157dB (@1kHz 1kOhms 0.5% THD, 0/-10dB)
  • Frequency Range: 20 Hz~20 KHz
  • Sensitivity: 10mV/Pa Or -40dB
  • Output Impedance: 100 Ohms
  • Rated Load Impedance: 1kOhms
  • Equivalent Noise: 10dBA (IEC651)
  • Total Weight: 1.1 Lbs
  • Mic Diameter: 2-1/16 inches
  • Mic Length: 8-1/4 inches
  • Includes: Shockmount, Hard Mount, Zipper Storage Pouch

This microphone ships fully insured with signature required.