AKG PZM11 User manual

®
T
PRESSUREZONE
MICROPHONE®
PZM11(LL)
heAKG/Crown PZM11 is a Pressure
Zone Microphone® designed for
security, surveillance, and conference-
room applications. It can be mounted in
theceilingor wall in astandard
electrical outlet box. Providing excellent
intelligibility, the PZM11 is designed to look
like something other than a microphone so as
not to draw attention.
Like other Pressure Zone Microphones, the
PZM11 utilizes the Pressure Recording Pro-
cess™in which a miniature condenser
microphone capsule is mounted very close to
a sound-reflecting plate or boundary. The cap-
sule is mounted in the “Pressure Zone”just
above the boundary, a region where sound
coming directly from the sound source com-
bines in-phase with sound reflected off the
boundary. Thebenefits areawide, smooth fre-
quency response free of phase interference,
excellent clarity and “reach,”and consistent
pickup anywhere around themicrophone.
In the PZM11, low frequencies below the
voicerangearerolled off to reducepickup of
Specifications
Type: Pressure ZoneMicrophone.
Element: Electret condenser.
Frequencyresponse (typical): 80 Hzto 20,000 Hz.
SeeFig. 1.
Polar pattern: Hemispherical.
Impedance: 225 ohms, balanced. Recommended
minimum load impedance1000 ohms.
Opencircuit sensitivity: 5mV/Pa* (–46 dBV/Pa).
Power sensitivity: –45.5 dBm/Pa*
Fig. 1
air-conditioning rumble. Thehigh-frequency
response is boosted slightly to aid clarity and
articulation.
Themicrophoneconnector is arow of screw
terminals for easy installation. The output is
balanced, low impedance, which allows
long cable runs without hum pickup or
high-frequency loss. Powering is via 12 to
48 volts phantom power.
Installation
1. Please refer to Fig. 3 and locateall the parts
shown.
2. Run a 2-conductor shielded microphone
cable to the ceiling or wall holewhereyou in-
tend to install the microphone. Install a stan-
dard electrical outlet boxin thehole.
3. Run the mic cable throughtheholein the
electrical box and through the hole in the
chassis.
4. Servicethe end of themic cable.
5. Attach the leads to the screw terminals.
Connect thecable shield to 1, light-colored
lead to 2, and darker lead to 3.
6. Place thechassis over the two long screws.
Using the nuts provided, secure the chassis to
thefaceplate.
EIA rating: –139 dBm.
Equivalent noise level (self-noise): 26 dBSPL
typical (0 dB= .0002 dyne/cm2), A-weighted.
S/NRatio: 68 dBat 94 dBSPL.
MaximumSPL: 120 dB SPL produces 3% THD.
Output connector: Threescrew terminals.
1 = ground, 2 =audio (hot), 3 = audio (return).
Polarity: Positive pressure on the diaphragm
produces apositive voltageon screw terminal 2
with respect to screwterminal 3.
Operating voltage: Standard phantom power, 12 to
48 volts DC on screw terminals 2 and 3 with
respect to screw terminal 1.
Current drain: 400 microamperes.
Materials: Steel plate and high-impact plastic
capsule holder.
Finish: Off-white.
Net weight: 2.5 oz. (71 g).
Dimensions: SeeFig.2.
Optional accessories: AKG/CrownPH1A
phantom power supply (1 channel, battery or
ACadapter powered), AKG/Crown PH4B
phantom power supply (4 channels, AC
powered).
*1pascal =10 dynes/cm2 = 10 microbars = 94 dBSPL.
Fig. 2

AKG ACOUSTICS GMBH
LAXENBURGERSTRASSE 254
1230 VIENNA
AUSTRIA
AKG ACOUSTICS, U.S. SERVICE
24950 GROVE VIEW ROAD
MORENO VALLEY, CA 92551
U.S.A
© 2015 HARMAN International Industries,
Incorporated. All rights reserved. AKG is a trademark
of AKG Acoustics GmbH, registered in the United
States and/or other countries.
Features, specifications and appearance are subject
to change without notice.
www.akg.com
®
Fig. 3
MIC
CABLE
ELECTRICAL
BOX
NUTS
10. Connect the output of the phantom sup-
ply to your equipment mic input. Or, if your
mic input has phantom power built in, simply
connect themic cableto themic input.
11. If the mic cable is run in metal conduit,
ground loops might occur that can cause
hum. If hum is present after installation, re-
Service
FACEPLATE
SCREW
CHASSIS
LONG
SCREWS
movetheground-lift jumper (labeledGND
LIFT) ontheprinted-circuit board.
Architects’andEngineers’Specifications
Themicrophoneshall betheAKG/Crown
Model PZM11 or equivalent. The
microphoneshall beaPressureZone
Microphone, electret-condenser type,
with built-in electronics interface.
The microphone capsule holder shall be
mounted on a standard switch plate. The
microphone shall be powered from 12-48V
phantom power. The output shall be low im-
pedancebalanced. Frequency responseshall
If the unit fails to work, first replace or repair the
mic cables and check the power supply. Re-
check your connections to the microphone
screw terminals If you determine that the
microphone product is defective, return the
complete product in its original packaging to
one of the addresses below. For further
assistance or technical support call the
international helpdesk at
[phone]
7. Using thetwo screws provided, securethe
faceplatetotheelectrical box.
8. If you plan to use acableconnector, solder
the other end of the mic cableto a 3-pin pro-
fessional audio connector (XLR-type). Solder
the cableshield to pin 1, light-colored lead to
pin 2, and darker leadto pin3.
9. If you plan to useacableconnector, con-
nect the3-pin pro audio connector to theinput
of aphantom power supply. AKG/Crown
makes a PH4Bphantom power supply
(4 channels,AC-powered)andPH1A phantom
power supply (1 channel, battery or AC-
adapter powered).
befrom 80 Hzto 20,000 Hz. Lowfrequencies
below the voice range shall be rolled off.
Open-circuit sensitivity shall be5mV/Pa
(–46 dB re 1V/Pa). Maximum SPL capability
shall be 120 dB SPL at 3% THD. Equivalent
noise shall be 26 dBA typical (0 dB = .0002
dyne/cm2). The AKG/Crown model PZM11
microphoneis specified.
Warranty
AKG/Crown professional microphones are
guaranteed unconditionally against
malfunction from any cause for a period of
three years from date of original purchase.
See enclosed warranty sheet for additional
information.
PZM11 Schematic
PZM11 (LL)