Warm Audio WA-47jr Large-Diaphragm FET Condenser Microphone

SKU: WA-47JR Category:

Key Features

  • For Studio Voice and Instrument Miking
  • Cardioid, Omni & Figure-8 Polar Patterns
  • K47-Style Capsule Reproduction
  • -10 dB Pad Prevents Distortion
  • 70 Hz High-Pass Filter
  • Includes Shockmount and Hardmount
  • Gold-Sputtered, Dual Large Diaphragms
  • Fully Discrete Signal Path
  • Transformerless Balanced XLR Output
  • Requires 48V Phantom Power


Out of stock

Offered here in a silver finish, the Warm Audio WA-47jr is a large-diaphragm FET condenser microphone designed to provide the tonal characteristics of classic solid-state U47 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 a switch on the front of the body, its versatility allows it to excel at anything from dry, close-up vocals to ambient room sounds. A -10 dB pad switch raises the maximum SPL from 147 dB to a high of 157 dB, enabling safe use when miking kick drums and cranked guitar and bass amps. Excessive low frequencies from proximity effect are easily reduced via the high-pass filter, which rolls off lows below 70 Hz.

The K47-style capsule reproduction features dual gold-sputtered, 6-micron Mylar diaphragms with a single backplate. The fully discrete signal path includes Toshiba FETs, WIMA film capacitors, and Panasonic electrolytic capacitors to deliver the clean tone associated with transformerless microphones. With a gold-plated XLR 3-pin connector and operability via 48V phantom power, it is compatible with most mixing consoles and mic preamps. It comes with a vibration-reducing shockmount and a compact hardmount to allow flexibility in placement and positioning.

Custom Capsule

The WA-47jr utilizes a custom reproduction of the vintage K47-style capsule that was used in the classic U47 microphone—designed with the same 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.

Low Noise

The WA-47jr’s discrete signal path pairs with the true U47-style capsule to obtain a very similar tone to the classic U47 microphone. The low self-noise of only 9 dBA enables pristine capture of quiet sound sources.

Tone-Impacting Components

The WA-47jr incorporates a modernized and simplified circuit design. Toshiba FETs, WIMA film capacitors, and Panasonic electrolytic capacitors contribute to the signature tone of the mic.

Configuration Flexibility

Three polar patterns and a -10 dB pad enable versatility for close and distant positions and loud and quiet sources. The 70 Hz high-pass filter aids in reducing rumble, proximity effect, and excessive low frequencies.

Features at a Glance

  • Updated transformerless version of the highly coveted classic ’47 microphone
  • Custom-made Warm Audio K47-style 1.3″ capsule (model# WA-47-B-80v)
  • Gold-sputtered, dual large diaphragms (6-micron Mylar) with a single backplate
  • Fully discrete signal path, Toshiba FETs, Wima film capacitors, and Panasonic electrolytic capacitors
  • Cardioid, figure-8, and omnidirectional polar patterns
  • 70 Hz high-pass filter
  • -10 dB pad
  • XLR 3-pin output
  • Requires 48V phantom power
  • Includes shockmount, hardmount, and pouch


Primary Applications

Studio Recording

Form Factor

Large Diaphragm Mic / Stand/Boom Mount

Intended Sound Sources

Vocals, Instrument

Sound Field


Operating Principle

Pressure Gradient




1.3" / 34 mm

Polar Pattern

Cardioid, Figure-8, Omnidirectional

Pattern Selection

Switched (Adjustable on Mic)


Side Address


Solid-State (FET)


-10 dB

High-Pass Filter

70 Hz

Tone Adjustment


Gain Adjustment




On-Board Controls

High-Pass Filter, Pad, Polar Pattern




Frequency Range

20 Hz to 20 kHz

Maximum SPL

147 dB SPL (1 kHz, .5% THD, 1-Kilohm Load)
157 dB SPL (1 kHz, .5% THD, 1-Kilohm Load, with Pad)


100 Ohms

Load Impedance

≥ 1000 Ohms


-40 dB

Dynamic Range

Dynamic Range

Signal-to-Noise Ratio

85 dB A-Weighted

Equivalent Noise Level

9 dB A-Weighted


Output Connectors (Analog)

1 x XLR 3-Pin Male (on Mic)

Headphone Connector



Bus Power


Operating Voltage

48 V (Phantom Power)





Mic Clip, Shockmount (Included)

Included Case

Zipper Pouch

Included Filters



ø: 2 x L: 8.3" / ø: 5.2 x L: 21 cm


1.1 lb / 0.5 kg

Packaging Info

Package Weight

3.83 lb

Box Dimensions (LxWxH)

11.15 x 10 x 6.2"


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  • Warm Audio WA-47jr Large-Diaphragm FET Condenser Microphone
  • Shockmount
  • Hardmount
  • Zippered Storage Pouch