Mic Archive
Earthworks SR40V
Photo: Earthworks, from its manual (Recording Hacks copy), p. 1.

Earthworks Audio

Earthworks SR40V

Handheld hypercardioid condenser vocal mic (prepolarised), transformerless, 40 kHz response, wire-mesh windscreen

Approximate Some readings for this mic are uncertain; see the graphs.

Type
Condenser (electret)
Pattern
Hypercardioid
Sensitivity
−40 dBV/Pa
Self-noise
15 dB(A)
Max SPL
145 dB SPL
Impedance
65 Ω
Rated range
20 – 40k Hz

Frequency response

Angle
Distance

Frequency response: from the manual (Recording Hacks copy), p. 2. Fig. 2 "Frequency Response (Typical) of SR40V" in the 2011 owner's manual; relative dB, 3 dB per division, 1 Hz to 100 kHz shown. Room and smoothing not stated. Dashed line, labelled "1m (3.3')"; drawn from about 50 Hz until it joins the 30 cm line.

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

Polar pattern

Polar pattern: from the spec sheet, p. 2. "Polar Response" on page 2 of the 2020 data sheet; full circle, rings every 5 dB (outer ring 0 dB, centre -30 dB). Measuring conditions not stated. The 2011 manual's Fig. 4 shows the same four frequencies. Approximate reading error up to about 1 dB.

Compare with other mics

All specs

From the spec sheet
Sensitivity−40 dBV/Pa (10 mV/Pa). "10mV/Pa (-40dBV/Pa)"; the same in all four documents.p. 2
Self-noise15 dB(A); also 20 dB(A), 2022 user guide; also 22 dB(A), 2011 manual and data sheet. "15dB (A weighted)". The 2022 user guide says "20dB SPL (A weighted)", the 2011 manual "22dBA equivalent".
Max SPL145 dB SPL. "145dB SPL". The 2011 sheet: "up to 145 dB producing no more than 3% THD".
Signal-to-noise ratio79 dB, A-weighted. "79dB A-weighted" (94 dB SPL minus the 15 dB noise).
Output impedance65 ohm, balanced, between pins 2 and 3; also 100 ohm, 2011 manual and data sheet: balanced, 50 ohm each pin. "65Ω bal. (between pins 2 & 3 )".
Rated load impedance600 ohm, minimum, balanced between pins 2 and 3
Rated frequency range20 Hz to 40 kHz; also [30, 40000], ±2 dB at 30 cm, 2011 data sheet; ±1.5 dB at 30 cm, 2011 manual. "20Hz to 40kHz", no tolerance given.
Poweringphantom 24-48 V. "24-48V Phantom, 10mA". The 2011 documents say 48 V phantom.
Current draw10 mA
ConnectorXLR-3 male (pin 2 hot). "XLR-3 (pin 2+)".
Weight225 g; also 363, 2022 user guide (".80lb (363g)") and 2011 manual ("12.8 oz (363g)"). "0.5 lbs. (225g)"; the 2011 data sheet says the same.
Dimensions184 × 55.3 mm. Length x maximum diameter of the tapered body: "7.25 in. (184 mm)", "1.95 in (55.3mm) max dia."; "0.97 in (27.5mm) min dia.".
Applications (Earthworks)Vocals on stage or in the studio, voice-overs, instruments; "Three singers can sing on one SR40V"p. 1
From the spec sheet (Recording Hacks copy)
Capsulesingle capsule, single membrane, back-electret. "of a single capsule, single membrane design".p. 1
Finishblack metal body, wire-mesh windscreen. "The microphone shall be made of metal with a black finish"; "a wire-mesh windscreen".
Impulse responseRise time no longer than 25 µs; total settling time, rise time included, no longer than 120 µs
Polar characteristics"uniform in all planes to form a hypercardioid of revolution"; uniform frequency response at 0°, 45° and 90°
From the user guide
Supplied accessoriesmicrophone clip; protective fabric bag. "1 SR40V Microphone, 1 Microphone Clip, 1 Protective Fabric Bag".p. 2
From the manual (Recording Hacks copy)
PatentUS Patent No. 6,091,829p. 2

Documents

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

Recording Hacks

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