Sennheiser
Sennheiser e 904
Dynamic, cardioid, compact drum mic with integral stand mount and rim clip
Power None: a dynamic mic needs no power. Low output: it needs a lot of preamp gain.
- Type
- Dynamic
- Pattern
- Cardioid
- Sensitivity
- −54 dBV/Pa
- Among 78 dynamics: more output than 47%
- Among 311 mics: more output than 16%
- Rated range
- 40 – 18k Hz
vs 44 end-address dynamics
More output than 56% of 44 end-address dynamics.
Each stripe is one end-address dynamic with a published sensitivity, and each bar counts them; further right means more output. This mic is in blue.
Proximity effect: the bass it gains up close
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
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.
In practice
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 impedance | 350 ohmnominal, 1 kHz | |
| Rated load impedance | 1000 ohmminimum. "Min. terminating impedance 1 kΩ". | |
| Rated frequency range | 40 Hz to 18 kHz | |
| Weight | 125 g | |
| Dimensions | 41 × 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 accessories | MZH 604 drum clip; pouch"Delivery includes". | |
| Body | Robust reinforced metal casing, very short body with integrated stand mount and a universal rim clip | |
| From the manual (Recording Hacks copy) | ||
| Connector | XLR-3, gold-plated, turned by 45°"Gold-plated XLR connector (turned by 45°)" (p. 2); the spec sheet says XLR-3. | p. 2 |
| Hum | Humbucking coil protects against electromagnetic interference | |
| PlacementSennheiser | 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
- evolution wired e 904 Product SpecificationSP 1214 v1.0
- e 904 Instructions for usePubl. 03/07, 094274/A04
- e 904 product sheetCat. No. 500200
Copies kept by Mic Archive (manufacturers move and drop their documents). Each is © Sennheiser, unchanged, with its original address.
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