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Sennheiser MD 431 II
Photo: Sennheiser, from its spec sheet, p. 1.

Sennheiser

Sennheiser MD 431 II

Dynamic, supercardioid, handheld vocal mic with shock-mounted capsule, hum-bucking coil and lockable reed on/off switch

Type
Dynamic
Pattern
Supercardioid
Sensitivity
−54 dBV/Pa
Impedance
250 Ω
Rated range
40 – 18k Hz

Frequency response

Angle
Distance

Frequency response: from the spec sheet, p. 1. Titled "Frequency response"; legend 0°, 90°, 120°; drawn as absolute sensitivity ("dBv"). Distance, room and smoothing not stated.

The manufacturer draws absolute sensitivity (dBV/Pa); shifted here by a constant so 1 kHz is near 0 dB.

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. 1. Titled "Polar pattern". Each frequency is drawn on one side only (125 to 1000 Hz left, 2000 to 16000 Hz right); the pattern is taken as symmetric. Measuring conditions not stated.

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All specs

From the spec sheet
Sensitivity−54 dBV/Pa (2 mV/Pa), free field, no load, 1 kHz; ± 3 dB; also −53 dBV/Pa, 2003 instructions: field open-circuit sensitivity at 1 kHz, "2.2 mV/ Pa ± 2.5 dB ( = - 53 dBV)". "Sensitivity (free field, no load, 1 kHz) 2.0 mV/Pa ± 3 dB"; converted (20 log10 0.002).p. 1
Output impedance250 ohm, nominal, 1 kHz
Rated load impedance1000 ohm, minimum terminating impedance. "Min. terminating impedance 1 kΩ".
Rated frequency range40 Hz to 18 kHz. "Frequency response 40 – 18,000 Hz"; the 2003 instructions give the same "transmission range".
Poweringnone (passive). Not stated by the manufacturer: A dynamic mic; no powering is mentioned.
Switchespower: on, off. "On/off switch (reed switch) can be locked in the ‚ON‘ position if required"; recessed in the handle.
ConnectorXLR-3
Weight250 g; also 230, 2003 instructions, "aprox. 230 g"
Dimensions49 × 200 mm. "Ø 49 x 200 mm" (diameter by length); the 2003 instructions agree.
Supplied accessoriesMZA 4031 quick release clamp. "Delivery includes".
ConstructionShock-suspended capsule, hum-bucking (hum compensating) coil, steel-mesh grille, integral pop filter
Proximity effectInternal electronics for refining proximity effect
Article number001605
From the manual (Recording Hacks copy)
Acoustic operating modePressure-gradient receiverp. 2
Optional accessoriesStageHand quick-change clamp (art. no. 3388); MZW 4032 pop/windshields in five colours; MZW 416-1 windshield

Documents

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

Product page on sennheiser.comRecording Hacks

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