Mic Archive
Sennheiser e 908 B
Photo: Sennheiser, from its spec sheet, p. 1.

Sennheiser

Sennheiser e 908 B

Miniature cardioid condenser clip-on for brass, on a long gooseneck with a bell clamp; MZA 900 P in-line phantom adapter

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

Type
Condenser (electret)
Pattern
Cardioid
Sensitivity
−48 dBV/Pa
Self-noise
35 dB(A)
Max SPL
147 dB SPL
Impedance
100 Ω
Rated range
40 – 20k Hz

Frequency response

Angle
Distance

Frequency response: from the spec sheet, p. 2. "Frequency response" graph, absolute sensitivity in dBV/Pa; legend "1 m, 0°", "1 m, 90°", "1 m, 180°", "10 cm, 0°". 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 16 000 Hz right); the pattern is taken as symmetric. Measuring conditions not stated. Approximate some frequencies are identified by reasoning, not by the legend: 125 Hz.

Compare with other mics

All specs

From the spec sheet
Sensitivity−48 dBV/Pa (4 mV/Pa), free field, 1 kHz. "4 mV/Pa"; converted (20 log10 0.004). The 2006 manual: "4.0 mV/Pa (free field, no load at 1 kHz)"; e 908 T ew 0.56 mV/Pa.p. 1
Self-noise35 dB(A), with the MZA 900 P; also 30 dB(A), e 908 B ew, direct. "Equivalent noise level 30 dB(A), 35 dB(A)*", * with MZA 900 P. The 2006 manual: e 908 B and D 35 dB(A), B ew 30 dB(A), T ew 39 dB(A), "A-weighted as per DIN IEC 651".
Max SPL147 dB SPL, k = 3%. "147 dBSPL (k = 3%)". The 2006 manual: "at 1 kHz 147 dB/SPL".
Output impedance100 ohm, nominal, 1 kHz, balanced, with the MZA 900 P
Rated load impedance50 ohm, minimum, with the MZA 900 P; also 2000 ohm, 2006 manual and 2009 sheet. "Min. terminating impedance 50 Ω". The 2006 manual and 2009 sheet say 2 kΩ, and the quick guide gives the MZA 900 P a min. load impedance of 5 kΩ (0 dB) or 2 kΩ (-12 dB) (page 2), so 50 Ω looks doubtful.
Rated frequency range40 Hz to 20 kHz
Poweringphantom 12-48 V, through the MZA 900 P. "Phantom powering 12 - 48 V*", * with MZA 900 P. The quick guide gives the MZA 900 P "P12 – P48; 10 – 52 V; 2.6 – 2.8 mA" (page 2).
ConnectorXLR-3 on the MZA 900 P; the mic cable ends in a locking 3.5 mm jack. "XLR-3*" (with MZA 900 P) for the e 908 B, "3.5 mm jack" for the e 908 B ew. Page 2 drawing: "Stereo miniature plug 3,5 mm with locking screw".
Weight140 g. "140 g"; the quick guide prints "140 g*", * with MZA 900 P. The 2006 manual and 2009 sheet say 311 g.
Supplied accessoriesMZH 908 B microphone clamp; MZA 900 P phantom adapter; pouch; windshield. "Delivery includes" (the MZA 900 P with the e 908 B only).
DimensionsØ 47 x 193 mm
From the quick guide
Low cutoff, 125 Hz, 12 dB/octave; 125 Hz; 12 dB/octave. On the MZA 900 P: "Roll-off filter, switchable 125 Hz (- 3 dB), 12 dB/oct.".p. 2
Pad−12 dB. On the MZA 900 P: "Gain, switchable 0/-12 dB".
MZA 900 P adapterFrequency response 20-20,000 Hz (-1 dB); max. output 1.8 V (P48), 0.6 V (P12) at 0 dB gain, 0.45 V at -12 dB; output noise 3 µV A-weighted, 12 µV CCIR; output impedance 100 Ω; LED for operating and error; Ø 22 x 100 mm, 60 g
Operating conditions (MZA 900 P)-20 to +60 °C, < 95% relative humidity
From the manual (Recording Hacks copy)
Current draw3 mA, with the MZA 900 P. "12–48 V / 3 mA*". The quick guide: 2.6-2.8 mA for the MZA 900 P.p. 9
MountLong flexible gooseneck, shock-mounted head; MZH 908 B clamp for instrument bells (also usable on drums with suspension mounts and congas)p. 2
Placement (Sennheiser)Saxophone: aim partly at the bell and partly at the body; into the bell for less spill. Drums (e 908 D): 3-5 cm above the head, aimed at the centre, at 30-60° for the most balanced soundp. 4
From the spec sheet (Recording Hacks copy)
Modelse 908 B (Art. no. 500203): with MZA 900 P, for brass. e 908 B ew (500204): no adapter, 3.5 mm jack for evolution wireless bodypacks. e 908 D: for drums and percussion, with the MZH 908 D drum clamp and MZA 900 P. e 908 T ew: for trumpets, flugelhorns and trombones on ew bodypacks, 0.56 mV/Pa, 39 dB(A)p. 1

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