Microtech Gefell KEM 975 User manual

KEM 975
Cardioid-Plane-
Microphone
with non-rotatinal symmetrical directivity
Manual
M.EN 201180.01
Date of issue: 31.08.2016
User Manual

Adress Microtech Gefell GmbH
Georg-Neumann-Platz
07926 Gefell
Germany
Telephone [phone]
Fax [phone]
Internet www.microtechgefell.de
E-Mail [e-mail]
2 M.EN 201180.01
Address

Operating elements
KEM 975
On/Off
switch for
LED-light
socket for
delta capsule
4-pole
connector for
delta capsule
LED-light
XLR5M-
connection
microphone holder
MH 975
Power supply N 975
rotary switch
GAIN
on/off
switch
OUTPUT PIN1
switch
XLR3M-
connection
XLR5F-
connection
safety
switch
power
supply
line
level
meter
M.EN 201180.01 3
on/off
switch for
LED indicator
4-pole
connector for
Delta capsule
LED indicator
socket for
Delta capsule
microphone holder
MH 975
XLR-5M
connector
IEC mains
connector
fuse holder / voltage
change switch
OUTPUT PIN 1
switch (earth lift)
XLR-3M
output
connector
XLR-5F
microphone
input
connector
rotary switch
GAIN
level
meter
on/off
switch

Rackmount kit
front panel
connector
housingrack
adapter rack
adapter
4 M.EN 201180.01
rack
adaptor
“ear”
joining
connector
blank panel
rack
adaptor
“ear”

10
M.EN 201180.01
Contents
1 Technical specifications 07
2 Delivery 08
3 Accessories 09
4 About this manual 10
5 General Safety Instructions 10
5.1 Danger and information signs . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . 10
5.2 Normal Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.3 Unauthorised Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.4 Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Initial Steps 11
6.1 Setting up the equipment .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11
6.1.1 Setting up the KEM 975 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1.2 Setting up the N 975 power supply . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Installing the rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11
6.2.1 Installing the N 975 into a half-19” Rack . . . . . . . . . . . . . . . . . . . . . 12
6.2.2 Installing the 19” Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.3 Connecting the equipment .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13
6.4 Aligning the microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 13
6.5 Disassembling and storing the microphone.. . . . . . . . . . . . . . . . . . . . . . .. 14
6.5.1 Storage at the venue . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 14
6.5.2 Storage in the transport case ... . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Individual settings 14
7.1 Setting the supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14
7.2 Setting the level ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.3 Setting grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8 Use of the accessories 16
8.1 Using the DM 21 Delta capsule .. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16
8.1.1 Installing the DM 21 Delta capsule . . . . . . . . . . . . . . . . . . . . . . . . 16
8.1.2 Removing the DM 21 Delta capsule .. . . . . . . . . . . . . . . . . . . . . . 17
8.2 Using a microphone stand .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17
8.3 Using the KH 975.1 or KH 975.03 anti-vibration mount . . . . . . . . . . . . . . . . . . 17
8.3.1 Installing the KH 975.1 or KH 975.03 anti-vibration mount . . . . . . . . . . .. 17
8.3.2 Removing the KH 975.1 or KH 975.03 anti-vibration mount . . . . . . . . . .. 18
8.4 Using the MA 975 auditorium hanger . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.4.1 Installing the MA 975 auditorium hanger . . . . . . . . . . . . . . . . . . ... 19
8.4.2 Removing the MA 975 auditorium hanger . . . . . . . . . ... . . . . . . . . . 19
9 Cleaning and Maintenance 19
9.1 Cleaning . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . .. 19
9.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
M.EN 201180.01
5

10
M.EN 201180.01
10 Guarantee 20
11 Disposal of old equipment 21
6

1 Technical specifications
Cardioid-Plane-Microphone KEM 975
Poar pattern horizontal super cardioid
vertical club shaped
Recording angle horizontal 120 Grad
vertical 30 Grad
Acoustic operating principle Pressure gradient
transducer
Frequency range 40 bis 18000 Hz
Sensitivity 775 mV/Pa
at 1 kHz, Gain 0 dB
Rated impedance 40 Ohm
Equivalent loudness level CCIR 468-4 24 dB
DIN EN 60268-4 15 dB(A)
Max. SPL for THD 0,5 Gain 12 dB 104 dB
Gain 0 dB 116 dB
Gain -12 dB 128 dB
Gain -24 dB 140 dB
Gain -36 dB 152 dB
Connecting plugs Neutrik XLR5M
Weight 1,07 kg
Length 343 mm
Diameter Mesh 38 mm
Gain 25 mm
Finish nickel matt,
dunkel bronze
Power supply N 975
Power supply voltage 230/115 V AC
±10%, 50/60 Hz
Connecting plugs KEM 975 XLR5F
Audiosignal XLR3M
Weight 1,6 kg
Width 221 mm
Depth 170 mm
Height 45 mm
M.EN 201180.01 7
Polar pattern
Output connector
Neutrik XLR-5M
120º
30º
40 - 18,000 Hz
40 Ω
Housing
Connectors
Audio output
XLR-5F
XLR-3M
satin nickel
dark bronze
Connectors
Connectors
Output connector

2 Delivery
Cardioid-Plane-Microphone KEM 975
Microphone holder MH 975
Power supply N 975
Connection cable (10 m) C 975.1
Main cable
Rack mounting set
Reducing nut 5/8” on 3/8” or 1/2”
Tommy-screw 8 mm for MH 975
Socket wrench 8 mm for MH 975
Suitcase 450 x 160 x 365 mm
satin nickel Order-No. 211180
dark bronze Order-No. 211181
Prior to each use of the microphone make sure that all the parts are in a perfect condition. We also rec-
ommend to inspect the device for residual dust at appropriate intervals and to have the Microtech Gefell GmbH
examine it, if necessary.
8 M.EN 201180.01
IEC mains cable
Thread adaptor: ⅝” male to ⅜” & ½” female
8mm Allen key for MH 975
Transit case 450 x 160 x 365 mm
Prior to each use of the microphone make sure that all parts are in perfect condition.
We also recommend that the microphone is inspected for residual dust at appropriate intervals and to have
Microtech Gefell GmbH examine it, if necessary.

3 Accessories
Microphone connection cable 10 m C975.1 Order-No. 202224
Microphone connection cable 20 m C975.2 Order-No. 202225
Microphone connection cable 30 m C975.3 Order-No. 202226
Microphone connection cable with angle plug 10 m C975.1 W Order-No. 202227
Delta-Capsule DM 21
satin nickel Order-No. 201246
dark bronze Order-No. 201247
Cone holder for elastic-stationary fixing KH 975.03
Reducing nut 5/8” on M10
nickel matt Order-No. 202374
dunkel bronze Order-No. 202375
Cone holder for elastic-stationary fixing KH 975.1
Reducing nut 5/8” auf M10
satin nickel Order-No. 202376
dark bronze Order-No. 202377
Microphone hanger MA 975
1x Microphone holder MH 975
2x Reducing nut 5/8” on M6
2x Ring screw M6
Tommy-screw und socket wrench 8 mm
satin nickel Order-No. 202380
dark bronze Order-No. 202381
Prior to each use of the microphone make sure that all the parts are in a perfect condition. We also recommend
to inspect the device for residual dust at appropriate intervals and to have the Microtech Gefell GmbH examine
it, if necessary.
M.EN 201180.01 9
Microphone connection cable with rt.angled plug 10m
satin nickel
dark bronze
Anti-vibration mount for permanent fixing - 10cm
Thread adaptor ⅝” to M10
Anti-vibration mount for permanent fixing - 3cm
Thread adaptor ⅝” to M10
Auditorium hanger
2 x Thread adaptor ⅝” to M6
2 x Ring screw M6
Tommy-screw and Allen key 8mm
Prior to each use of the microphone make sure that all parts are in perfect condition.
We also recommend that the microphone is inspected for dust at appropriate intervals and to have
Microtech Gefell GmbH examine it, if necessary.

10
M.EN 201180.01
4 About this manual
Please read this User Manual carefully before use
to minimise the risk of physical injury or damage to
property or to the equipment.
Keep this User Manual handy during installation
and store it in a safe place in case it is needed by a
user at a later date. If you are an installation
company, please make sure this Manual is passed
on to the customer on completion of the installation.
Please pass this User Manual on to any subsequent
owners to ensure safe use of the product.
5 General Safety Instructions
5.1 Danger and information signs
5.2 Normal Use
The KEM 975 is a line array microphone with the
main sound input direction perpendicular to the
front of the microphone. It is not a rotationally
symmetric polar-pattern, but a cardioid pattern at
rt.angles to the microphone and a narrow 30 !angle
in the other direction.
The microphone serves to capture one or more
sound sources from a spatially extended area.
It is designed for indoor use and, with the
corresponding accessories, for temporary outdoor
use.
5.3Unauthorised Use
This product should not be used by children or
persons with impaired physical, sensory or mental
abilities; nor by persons who have a lack of
experience, unless they are being supervised.
5.4Intended Use
Do not expose yourself to extreme noise levels