Mic Archive
Sennheiser e 904
Photo: Sennheiser, from its spec sheet, p. 1.

Sennheiser

Sennheiser e 904

Dynamic, cardioid, compact drum mic with integral stand mount and rim clip

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

Frequency response

Angle
Distance

Frequency response: from the spec sheet, p. 2. Titled "Frequency response"; drawn as absolute sensitivity (dBV), labelled "0°, 1 m". 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. 2. 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, 1 kHz. "2 mV/Pa"; converted (20 log10 0.002). The manual says "2.0 mV/Pa (at 1 kHz)", free field, no load.p. 1
Output impedance350 ohm, nominal, 1 kHz
Rated load impedance1000 ohm, minimum. "Min. terminating impedance 1 kΩ".
Rated frequency range40 Hz to 18 kHz
Weight125 g
Dimensions41 × 63 mm. "⌀ 41 x 63 mm": diameter × length. The drawing on page 2 gives 40.74 × 62.75 mm, and 74.46 mm high with the mount. The 2009 product sheet prints "Ø 63 x 41 mm".
Supplied accessoriesMZH 604 drum clip; pouch. "Delivery includes".
BodyRobust reinforced metal casing, very short body with integrated stand mount and a universal rim clip
From the manual (Recording Hacks copy)
ConnectorXLR-3, gold-plated, turned by 45°. "Gold-plated XLR connector (turned by 45°)" (p. 2); the spec sheet says XLR-3.p. 2
HumHumbucking coil protects against electromagnetic interference
Placement (Sennheiser)On drums: 3-5 cm above the batter head; the angle sets the ratio of fundamental to overtones, most balanced at 30-60°. A second e 904 can pick up the resonant head and snares (reverse the polarity of one).p. 4

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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