M 930 - Microphone Microtech Gefell - Free user manual and instructions

Product Type	Large Diaphragm Condenser Microphone
Brand	Microtech Gefell
Model	M 930
Category	Microphone
Transducer Type	Condenser (externally biased)
Polar Pattern	Cardioid
Frequency Response	20 Hz – 20 kHz
Sensitivity	20 mV/Pa ± 1 dB
Maximum SPL	140 dB (1% THD)
Equivalent Noise Level	14 dB (A-weighted)
Output Impedance	50 Ω
Power Supply	48 V Phantom Power (P48)
Connector	XLR 3-pin
Dimensions	58 mm Ø × 210 mm
Weight	450 g
Accessories Included	Elastic suspension mount, windscreen, wooden case
Application	Studio recording, vocals, acoustic instruments, overheads
Maintenance	Clean with soft dry cloth; store in dry place
Safety	Use only with P48 phantom power; avoid moisture and drops
Spare Parts / Repairability	Contact Microtech Gefell service for diaphragm replacement

Frequently Asked Questions - M 930 Microtech Gefell

What type of microphone is the M 930?

The M 930 is a large diaphragm condenser microphone with a cardioid polar pattern, ideal for studio recording.

Does the M 930 require phantom power?

Yes, it requires 48 V phantom power (P48) to operate. Most audio interfaces and mixers provide this.

What is the polar pattern of the M 930?

The M 930 features a cardioid polar pattern, which rejects sound from the rear and sides, minimizing room ambience.

How do I clean the M 930 microphone?

Clean the exterior with a soft dry cloth. Avoid liquids. For the grille, use a soft brush. Do not open the microphone.

What is the frequency response of the M 930?

The frequency response is 20 Hz to 20 kHz with a gentle presence boost around 5–10 kHz for clarity.

Can the M 930 handle loud sound sources?

Yes, it can handle up to 140 dB SPL (1% THD) before distortion, suitable for drums and guitar amps.

What accessories are included with the M 930?

The microphone comes with an elastic suspension mount, a windscreen, and a wooden storage case.

Is the M 930 suitable for vocals?

Yes, it is excellent for vocals with its warm, detailed sound and built-in pop protection.

What cable does the M 930 use?

It uses a standard XLR 3-pin male connector. Use a high-quality balanced XLR cable for best performance.

How should I store the M 930?

Store in the provided wooden case in a dry, dust-free environment, away from extreme temperatures.

USER MANUAL M 930 Microtech Gefell

microphones & acoustic systems - founded 1928 by Georg Neumann

M 930
M 940
M 950

STUDIO CONDENSER MICROPHONES

Polar pattern:

Cardioid, super-cardioid, wide-cardioid

■ Extreme dynamic range
■ Noise floor 7 dB-A
■ Universal applications
■ New large diaphragm capsule
■ Advanced circuit design
■ Transformerless output
■ Internal elastic suspension
Compact design

Close-up of a metallic H930 microphone with attached black and white plastic connector (no visible text or symbols)

Studio condenser microphones M 930, M 940, M 950 4

Delivery 6

Accessories, optional 7

Technical specification 8

Frequency responses 8 - 9

XY- and ORTF Stereo recordings 10

Surround arrangement INA 5 - indoor 12

Surround arrangement INA 5-R - outdoor 14

Close-up of a studio microphone with adjustable neck and antenna, no visible text or symbols

STUDIO CONDENSER MICROPHONES

High output level and exceptionally low noise

M 930 with cardioid directional pattern

M 940 with super-cardioid directional pattern

M 950 with wide-cardioid directional pattern

The M 930, M 940, M 950 studio condenser microphones combine modern large diaphragm capsule technology with the latest in semiconductor circuit topology. They are specifically designed to meet the needs of professional and semi-professional users who demand the highest performance.

The microphones are ideally suited for universal miking applications in broadcast and sound studios. They are also attractive for project studios. Applications include vocalists, announcers, dialog pickup and as spot microphones for recording guitars, keyboard, percussion, wind and string instruments.

The pick-up pattern is perpendicular to the direction of the microphone axis (side addressed). The model number and pick-up pattern symbol mark the front of the microphone.

The condenser capsules exhibits a smooth frequency response with a slight presence boost in the 7 to 11 kHz range. The polar response exhibits an exceptionally high degree of rejection for sounds impinging from the rear (cardioid) or sides (super-cardioid) of the microphone.

The electronic impedance converter uses a newly perfected circuit topology. This design reduces the noise floor to an extremely low level while also raising the maximum output capability. As a result, these microphones have a clean, distortion free sound over an extremely wide dynamic range. RFI susceptibility is very low.

The microphone capsule and electronics are elastically suspended inside the compact metal housing. This reduces the sensitivity to mechanical impact and structure born noise. The microphone stand holder MH 93.1 can be exchanged for an elastic suspension EA 93 or EH 93 P to further attenuate noise in extreme situations.

The M 930, M 940, M 950 connect to the microphone cable with a standard 3-pin XLR plug. Powering must be provided by an external 48 V phantom supply according to IEC 61938.

The microphones are finished in either a satin nickel or dark bronze color.

Close-up of a black audio recording device with a metallic grille and a blue cable, placed on a wooden surface (no visible text or symbols)

M 930 with EA 93 and A 93 satin nickelM 930 with EH 93 P and P 1

Close-up of a studio microphone with black foam roller and metallic head (no text or symbols visible)

M 930 with EH 93 P and P 110.20 dark bronze

Close-up of a metallic NDA studio microphone with adjustable stand (no text or symbols visible)

Close-up of a desktop microphone with a mesh head attachment, mounted on a stand (no visible text or symbols)

DELIVERY

Microphone M 930 with the microphone holder MH 93.1 in a wooden case

1x d x h 180 x 106 x 78 mm

satin nickel Order-No. 211150

dark bronze Order-No. 211151

Microphone M 940 with the microphone holder MH 93.1 in a wooden case

1x d x h 180 x 106 x 78 mm

satin nickel Order-No. 211156

dark bronze Order-No. 211157

Microphone M 950 with the microphone holder MH 93.1 in a wooden case

1x d x h 180 x 106 x 78 mm

satin nickel Order-No. 211191

dark bronze Order-No. 211192

Microphone M 930 with elastic suspension EA 93

satin nickel Order-No. 2111129

dark bronze Order-No. 2111130

Microphone M 930 with elastic suspension EH 93 P and Popscreen P 110.20

satin nickel Order-No. 2111159

dark bronze Order-No. 2111160

Ordering example:

M 930 with MH 93.1, satin nickel

M 930 with MH 93.1, dark bronze

Open wooden box containing a metallic microphone with mesh grille, placed on black wood (no text or symbols visible)

Open wooden box containing a metallic microphone with a small connector, no visible text or symbols.

ACCESSORIES optional

Windscreen, anthracite W 76 Order-No. 202407

Popscreen, black P 110.20 Order-No. 600085

Microphone holder, satin nickel MH 93.1 Order-No. 202304

Microphone holder, dark bronze MH 93.1 Order-No. 202303

Elastic suspension, satin nickel EH 93 P Order-No. 202357

Elastic suspension, dark bronze EH 93 P Order-No. 202358

Elastic suspension incl. A93, satin nickel EA 93 Order-No. 212311

Elastic suspension incl. A93, dark bronze EA 93 Order-No. 212312

Adaptor, satin nickel A 93 Order-No. 202354

Adaptor, dark bronze A 93 Order-No. 202355

Connection cable C 70 Order-No. 202212

W 76

Black cylindrical object with a hollow center, isolated on white background (no text or symbols)

EH 93 P satin nickel

Close-up of a mechanical component with a metallic fitting and black housing (no visible text or symbols)

EA 93 satin nickel

Metal mechanical structure with a spherical frame and a black-and-white helmet (no text or symbols visible)

EH 93 P dark bronze

Close-up of a black mechanical connector with a flanged tip and threaded end (no text or symbols visible)

EA 93 dark bronze

Black and white photo of a mechanical assembly with a star-like frame and a circular base (no text or symbols visible)

P 110.20

Black and white photo of a small object with a curved arm and a textured circular body, possibly a device or device component (no visible text or symbols)

MH 93.1 satin nickel

Metal pipe fitting with a cylindrical end, shown in angle (no text or symbols visible)

A 93 satin nickel

Close-up of a cylindrical mechanical component with textured surface and black base (no visible text or symbols)

MH 93.1 dark bronze

Metal pipe fitting with a curved handle and flange (no text or symbols visible)

A 93 dark bronze

Close-up of a black cylindrical mechanical component with threaded end (no visible text or symbols)

CE Certificate

TECHNICAL SPECIFICATIONS

M 930 M 950M 940

Polar pattern Cardioid Super-cardioid Wide-cardioid
Acoustic operating principle Pressure gradient transducer
Frequency range 40 ... 20.000 Hz
Sensitivity at 1 kHz 21 mV/Pa		23 mV/Pa 20 mV/Pa
Output impedance 100 Ω 100 Ω 100 Ω
Noise level CCIR 468-4 13 dB		12 dB		13 dB
	DIN EN 60268-4	7 dB-A	6 dB-A	7 dB-A
Signal-to-noise ratio (re 1 Pa at 1 kHz)	CCIR-weighted	81 dB	82 dB	81 dB
	A-weighted	87 dB	88 dB	87 dB
Max. SPL for K < 0,5 %		142 dB	141 dB	142 dB
Max. output level	RL= 1 kΩ	17 dBu	17 dBu	17 dBu
	RL= 10 kΩ	18 dBu	18 dBu	18 dBu
Dynamic range of electronics		135 dB	135 dB	135 dB
Current consumption (P 48, IEC 61938)		3,6 mA	3,6 mA	3,6 mA
Output connector		3-pin XLR connector, goldplated contacts
Weight without MH 93.1		210 g
Dimensions (L x ∅)		118 mm x 45 mm
Finish		satin nickel, dark bronze

FREQUENCY RESPONSES M 930

FREQUENCY RESPONSES M 940

FREQUENCY RESPONSES M 950

Polar patterns M 950

XY- AND ORTF-STEREO RECORDINGS

M 930 with cardioid directional pattern

M 940 with super-cardioid directional pattern

M 950 with wide-cardioid directional pattern

The exceptionally low self noise floor of these microphones, 6 respectively 7 db-A, the extremely high output level and the very low RFI susceptibility emphasize their practical value for stereo recordings.

The attractive shape of the currently smallest, extremely compact large diaphragm microphones makes possible stereo recordings in XY-technology, picture 1 or ORTF-arrangement, picture 2.

The XY-technology is the most widely used intensity stereophony. That can be favourably realised by a coincident arrangement of two mono microphones with considerable directional pattern. Both microphones are adjusted against each other in an angle of 45^-180^ according to the recording situation.

Also, the ORTF-arrangement of the micro-

phones, developed by the French broad-casting, can be easy handled as a variable solution. The M 930, M 940 or M 950 are mounted on the TD 93 tandem in a distance of 170 mm and an angle of 110° - adjusted to ORTF -. Distance and angle can be adjusted according to the demand. Transmission time and intensity differences of the signals are used for ORTF-stereo recordings.

Together with the specifically microphone holders, SH 93 stereo holder and TD 93 tandem, a equivalent to a stereo microphone can be offered.

The M 930, M 940 or M 950 are delivered as matched pairs for that applications.

Finish: satin nickel, dark bronze.

picture 1: XY-arrangement

picture 2: ORTF-arrangement

XY-arrangement with SH 93 ORTF-arrangement with TD 93

Close-up of metallic audio recording equipment with adjustable knobs and a stand (no visible text or symbols)

DELIVERY

Matched pair of condenser mics for XY-stereo recording with microphone holder MH 93.1 and Stereo holder SH 93 in wooden case l x d x h 334 x 148 x 76 mm
M 930-Stereo	satin nickel Order-No. 211161
dark bronze Order-No. 211162
M 940-Stereo	satin nickel Order-No. 211163
dark bronze Order-No. 211164
M 950-Stereo	satin nickel Order-No. 211193
dark bronze Order-No. 211194

Matched pair of condenser mics for ORTF-stereo recording with microphone holder MH 93.1

and Double mount TD 93 in wooden case I x d x h 334 x 148 x 76 mm

M 930-Stereo	satin nickel Order-No. 211165
dark bronze Order-No. 211166
M 940-Stereo	satin nickel Order-No. 211167
dark bronze Order-No. 211168
M 950-Stereo	satin nickel Order-No. 211195
dark bronze Order-No. 211196

SURROUND-ARRANGEMENT INA 5

with elastic suspension

Close-up of a multi-position microphone setup with connected cables and a close-up inset showing internal components (no text or symbols visible)

The INA 5 configuration - Ideale Nieren Anordnung / ideal cardioid arrangement - is an extension of the stereo INA 3 layout for surround recording. INA 3 and INA 5 are fully compatible with the 3/2 stereo format as specified in ITU 775.

This microphone bracket is especially well suited for use with our large diaphragm cardioid microphone M 930, M 940, M 950 with the matching MH 93 microphone holder, or EH 93 elastic suspension.

When the guard rings are unscrewed, the

microphones can be moved along the spokes. Other microphone types can also be used, e.g. the M 960 diffuse field microphone. Thanks to the modular construction of the bracket, other recording configurations are also possible on request, e.g. OCT- System, IRT-Surround, Decca Tree.

The three front microphones can be placed up to 17,5 cm away from the centre at an angle of 90°. The right and left surround microphones can be placed up to 59,5 cm from the centre at an angle of 60°.

Surround arrangement INA 5, suspended, TÜV-certificated

Close-up of a black audio recording device with attached microphone and ear clip, labeled 'SR INA 5' (no other text or symbols visible)

DELIVERY

Surround arrangement INA 5 black matt

with Elastic suspension for ∅ 21 mm, Velcro-band, 3 pcs, Ball headed hex screwdriver 3 mm, in suitcase

optionally equipped with

5 pcs	M 930	dark bronze Order-No. 211188
5 pcs	M 940	dark bronze Order-No. 211197
5 pcs	M 950	dark bronze Order-No. 211198

for suspended version:

Microphone suspension MA 5 TÜV-certificated, acc. BGV C1 Order-No. 212318

5 pcs Circlip SR INA 5

suspension-, safety- and adjusting rope, project specific on request

SURROUND-ARRANGEMENT INA 5-R

with elastic suspension

Close-up of a black audio recording device with multiple microphones and connectors (no visible text or symbols)

Surround arrangement INA 5-R, suspended, TÜV-certificated

Surround arrangement INA 5-R, suspended, TÜV-certificated

Close-up of a desktop microphone with attached cable and stand (no visible text or symbols)

Close-up of a black audio recording device with attached ring and mesh components, labeled JR INA 5-R and SR INA 5 (no text on device body)

DELIVERY

Surround arrangement INA 5-R

black matt

with Elastic suspension for ∅ 21 mm,

Connection cable CS.1 INA 5-R (10 m, ELKA 17 RFVD to 5 x XLR 3-pin, Au),

5 pcs Windscreen W INA 5-R, anthracite

5 pcs Rain shield RS INA 5-R,

3 pcs Velcro-band

in suitcase

optionally equipped with

5 pcs M 930

dark bronze Order-No. 2111101

5 pcs M 940

dark bronze Order-No.2111102

5 pcs M 950

dark bronze Order-No. 2111103

for suspended version:

Microphone suspension MA 5-R

TÜV-certificated, acc. BGV C1

Order-No. 212319

5 pcs Circlip SR INA 5

2 pcs Adjusting ring JR INA 5-R

suspension-, safety- and adjusting rope, project specific on request