Crown Microphone PZM 6D User Manual

PRESSURE ZONE  
®
MICROPHONE  
PZM®-6D  
he PZM-6D is a Pressure Zone Microphone  
designed for professional recording, sound  
Treinforcement, teleconferencing and broad-  
casting. Its low profile, unobtrusive appearance  
is appreciated in conference rooms, as well as  
on television, film and video productions. When  
suspended over an orchestra on a clear panel,  
the PZM practically disappears. Its miniature,  
permanently attached cable also reduces visual  
clutter.  
The PZM-6D has a switchable dual frequency  
response: rising or flat. The risingposition  
adds brilliance. This makes it useful wherever a  
crisp attack is desired, such as on percussion,  
drums or piano. The user can get a bright sound  
without boosting high frequencies on the re-  
cording console; the benefit is lower noise. The  
flatposition provides a smooth, flat high-fre-  
quency response for natural sound reproduc-  
tion.  
Fig. 1  
Specifications  
+15  
Type: Pressure Zone Microphone.  
Transducer: Electret condenser.  
Frequency response: 20 Hz to 20 kHz. See Fig. 1.  
+10  
RISING  
FLAT  
+5  
dB 0  
5  
Polar pattern: Hemispherical when used on a floor,  
wall or ceiling.  
10  
15  
20  
25  
30  
Open circuit sensitivity: 7 mV/Pa* (43 dB re 1  
volt/Pa).  
Capable of withstanding up to 150 dB SPL with-  
out distortion, the PZM will never overload in  
practical use. Its electret condenser capsule  
provides a wide, smooth frequency response  
from 20 Hz to 20 kHz. Self noise is low, and  
sensitivity is high enough to override mixer  
noise in distant-miking applications.  
Power sensitivity: 43 dB re 1 mW/Pa. EIA sensitiv-  
ity: 135 dBm.  
35  
20  
10K  
100  
1K  
Frequency in Hz  
Impedance: 240 ohms, balanced. Recommended  
minimum load impedance 1000 ohms.  
Legend –––––––––– RISING  
- - - - - - - - - FLAT  
Self-Noise: 20 dB equivalent sound pressure level,  
A-weighted.  
Low frequency response depends on size of surface.  
S/N ratio: 74 dB at 94 dB SPL.  
Like other Pressure Zone Microphones, the 6D  
utilizes the Pressure Recording Processin  
which a miniature condenser microphone cap-  
sule is arranged very close to a sound-reflecting  
plate or boundary. The capsule is mounted in the  
Pressure Zonejust above the boundary, a  
region where sound coming directly from the  
sound source combines in phase with sound  
reflected off the boundary. The benefits are a  
wide, smooth frequency response free of phase  
interference, excellent clarity and reach,a  
hemispherical polar pattern and uncolored off-  
axis response.  
Maximum Sound Pressure Level: 150 dB SPL at the  
microphone produces 3% THD.  
Fig. 2  
3 in.  
(7.62 cm)  
Polarity: Positive pressure on the diaphragm pro-  
duces positive voltage on pin 2 with respect to pin  
3 of the output connector.  
Operating voltage: Phantom power, 12-48 volts DC,  
positive voltage on pins 2 and 3 with respect to pin  
1 of the output connector.  
Current drain: 1.1 mA.  
2.5 in.  
(6.35 cm)  
Cable: Permanently attached 15-foot (4.58-m) black  
cable with an XLRM connector.  
Switch: Frequency-response select switch for rising  
or flat response.  
Operating Instructions  
Color: Black.  
The PZM-6D features self-contained electronics  
in the attached XLRM connector housing, which  
allows it to plug directly into a standard 12-48  
VDC phantom power supply.  
Dimensions: 3-in. x 2.5-in. x .375-in. (7.62-cm x  
6.35-cm x .95-cm). See Fig. 2.  
Included accessories: PZM windscreen, carrying  
pouch.  
.375 in.  
(0.95 cm)  
Optional accessories: PH-4B phantom power supply  
(4 channels, AC powered). PH-1A phantom power  
supply (1 channel, battery or AC-adapter pow-  
ered).  
Crown makes an AC-powered model PH-4B  
supply for powering up to four PZMs. Also avail-  
able is a single-channel AC/battery supply,  
Crown model PH-1A. For special applications,  
you can make your own battery supply as sug-  
gested in Fig. 3.  
2.5 in.  
(6.35 cm)  
3.8 in.  
(9.65 cm)  
* 1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.  
.750 in.  
(1.91 cm)  
Using 2-conductor shielded microphone cable,  
plug the microphone into a phantom power sup-  
ply. Connect the power supply output to a  
DIA.  
FLAT  
RISING  
 

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