Mic Archive
Warm Audio WA-47jr
Photo: Warm Audio, from its manual, p. 4.

Warm Audio

Warm Audio WA-47jr

Large-diaphragm FET condenser, transformerless, 47-style (K47) capsule; omni, cardioid and figure-8, -10 dB pad and 70 Hz high-pass filter

Type
Condenser
Pattern
Omni / cardioid / figure-8
Sensitivity
−40 dBV/Pa
Self-noise
9 dB(A)
Max SPL
147 dB SPL
Impedance
100 Ω
Rated range
20 – 20k Hz

Frequency response

Angle
Distance

Frequency response: from the graph cardioid. Product-page chart without a title or measuring conditions; relative dB, labelled +10dB to -20dB, 0 dB through the mid range.

Dashed: outside the rated range, or simulated (other angles and distances). Hover or tap the graphs for values.

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All specs

From the manual
Sensitivity−40 dBV/Pa (10 mV/Pa). "-40dB" (no reference printed; 10 mV/Pa is -40 dBV/Pa).p. 6
Self-noise9 dB(A); also 10 dB(A), "Equivalent Noise: 10dBA (IEC651)" (product page). "Self-Noise: 9dBA"; the 2019 manual (p. 6) also gives "Equivalent Noise: 9dBA (IEC651)", the product page 10 dBA.
Dynamic range138 dB, A-weighted (IEC 651). "Dynamic Range: 138dBA"; "(IEC651)" in the 2019 manual.
Output impedance100 ohm. "Output Impedance: 100 Ohms".
Rated frequency range20 Hz to 20 kHz. "Frequency Range: 20 Hz~20 KHz"; no tolerance given.
Low cutoff, 70 Hz; 70 Hz. "70 Hz High-Pass Filter"; slope not given (p. 2: "eliminates bass frequencies under 70 Hz").
Pad−10 dB. "-10 dB Pad".
Supplied accessoriesshock mount; hard mount; leather storage pouch. "Includes: Shockmount, Hard Mount, Leather Storage Pouch".
WA-47jr SEA cardioid-only version without pad or filter: single-backplate K47-style capsule, -37 dBV (14 mV/Pa), self-noise 9 dBA, maximum SPL 147 dB, 100 ohm; hard mount and leather pouchp. 58
From the manual 2019
CapsuleWA-47-B-80v: 34 mm K47-style, gold-sputtered dual 6 µm Mylar diaphragms; made in Australia. "Custom made Warm Audio k47 style 34mm capsule (model# WA-47-B-80v)"; "gold sputtered, dual large diaphragm, single backplate, 6 microns mylar"; "manufactured by an Australian capsule supplier" (p. 3). The 2025 manual (p. 6) says "Dual-Backplate"; see status.p. 6
Max SPL147 dB SPL, 1 kHz, 1 kohm load, 0.5% THD; also 157 dB SPL, -10 dB pad. "Maximum SPL: 147/157dB (@1kHz 1kOhms 0.5% THD, 0/-10dB)"; the 2025 manual: "147/157dB (Without/With Pad)".
Signal-to-noise ratio85 dB, A-weighted (IEC 651). "S/N Ratio: 85dBA (IEC651)".
Rated load impedance1000 ohm, minimum. "Rated Load Impedance: ≥1kOhms".
PoweringP48 phantom. "48v phantom powered".
ConnectorXLR-3 male, gold-plated. "3-Pin Gold-Plated XLR".
CircuitFully discrete, transformerless; Toshiba FETs, WIMA film capacitors, Panasonic electrolytic capacitors
Maximum output16 dBu at 1 kHz, 1 kohm, 0.5% THD
From the product page
Weight499 g. Not stated by the manufacturer: "Weight: 1.1 Lbs" (also in the 2019 manual), converted: 1.1 × 453.6 g.p. 1
Dimensions210 × 52 mm. "Diameter: 52mm | Length: 210mm" (length × diameter).

Documents

Copies kept by Mic Archive, because manufacturers move and drop their documents. Each is © Warm Audio, unchanged, with its original address.

Product page on warmaudio.com

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