Crown Audio Microphone PCC 170 User Manual

POLAR  
PATTERN  
PHASE COHERENT CARDIOID  
MICROPHONE  
®
PCC -170  
PCC-170W  
®
he Crown PCC-170 is a surface-  
mounted supercardioid microphone of  
T
professional quality. This handsomely styled  
unit is appropriate for use on the most elegant  
boardroom table or lectern. Other applications in-  
clude churches, courtrooms and council chambers.  
Features  
Because of its highly directional pickup pattern, the  
PCC-170 minimizes background noise and feed-  
back. The microphone reproduces the voice with a  
clean, clear and natural sound.  
Half-supercardioid polar pattern reduces  
ambient noise and room reverberation  
Perfect for multimiking applications in telecon-  
ferencing, distance learning, boardrooms and  
courtrooms  
Small and inconspicuous  
Available in black (PCC-170) or white (PCC-  
170W)  
Phase Coherent Cardioid design prevents color-  
ation from surface sound reflections  
Since the microphone capsule is placed on a  
boundary or surface, direct and reflected sounds  
arrive at the diaphragm in-phase. This coherent  
addition of direct and reflected waves increases  
sensitivity 6 dB and prevents phase cancellations.  
The mic capsule is small enough to ensure phase  
coherency up to the highest frequencies in the  
audible spectrum, resulting in a wide, smooth  
frequency response free of phase interference.  
Clarity and reach are also enhanced.  
Specifications  
Type: Phase Coherent Cardioid.  
Fig. 1  
Frequency Response  
Element: Electret condenser.  
Frequency response (typical): 50 Hz to 20,000 Hz at  
30 degrees incidence to surface (see Fig. 1).  
Polar pattern: Half-supercardioid (supercardioid in  
the hemisphere above the primary boundary). See  
Figs. 2 and 3.  
Self-contained electronics eliminate the need for  
an in-line preamp. Powered by 12-48V phantom  
power, the PCC-170 has a low-impedance mic-  
level balanced output which permits long cable  
runs without hum pickup or high-frequency loss.  
Although the standard connector option is a  
Switchcraft TB3M, the microphone can be special-  
ordered with a 0.25-in. (0.635-cm) stereo phone  
plug on the bottom of the base plate as the PCC-  
170SPP.  
Impedance: 150 ohms, balanced (recommended load  
impedance 1000 ohms or greater).  
Open circuit sensitivity (typical): 22 mV/Pa* (–33 dB  
re 1 volt/Pa).  
Frequency in Hz  
Power sensitivity: –30.5 dB re 1 mW/Pa*. EIA rating  
–125 dBm.  
Fig. 2  
Equivalent noise level (self-noise): 22 dB SPL typi-  
Vertical-Plane Polar Response  
cal (0 dB = .0002 dyne/cm2), A-weighted.  
The PCC-170W is finished in off-white to blend  
with church altars and other surroundings where  
the lighter color is appropriate.  
S/N ratio: 72 dB at 94 dB SPL.  
Maximum SPL: 120 dB SPL produces 3% THD.  
RFI suppression is included. Self-noise is low and  
sensitivity is very high. A bass-tilt switch allows  
the user to tailor the low-end response for particu-  
lar applications.  
Polarity: Positive pressure on the diaphragm produc-  
es positive voltage on pin 2 with respect to pin 3.  
Operating voltage: Phantom power, 12 to 48 volts DC  
on pins 2 and 3 with respect to pin 1.  
Current drain: 4 mA nominal.  
How to Set the Bass Tilt Switch  
Connector: Switchcraft TB3M in model PCC-170.  
Bottom-mounted 0.25-in. (0.635-cm) stereo  
phone plug in model PCC-170/SPP. See Fig. 7.  
On the bottom of the microphone is a BASS-TILT  
switch with three positions: FLAT, CUT, and  
BOOST. It adjusts the low-frequency response as  
shown in Fig. 1.  
Cable: 15-foot, black, two-conductor shielded cable  
with Switchcraft TA3F and A3M connectors. No  
cable supplied with SPP option.  
Fig. 3  
• The FLAT position provides a flat low-frequency  
response, for normal usage. The PCC-170 is  
shipped from the factory in flat position.  
Horizontal-Plane Polar Response  
Materials: High-impact molded plastic and steel  
mesh grille.  
• The CUT position rolls off the bass, useful in  
noisy or boomy surroundings.  
Finish: PCC-170: black. PCC-170W: off-white.  
Net weight: 6 oz. (170 g).  
• The BOOST position boosts the bass for a more  
natural sound when the mic is used on a small  
surface such as a lectern.  
Dimensions: See Figs. 4 and 7.  
Optional accessories: Crown PH-1A phantom power  
supply (single channel, battery or AC adapter  
powered).  
How to Adjust the High-Frequency Response  
The microphone is factory-set for flat response  
at high frequencies. You can raise or lower the  
high-frequency response for special applications.  
Please follow this procedure:  
*1 pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL.  
(Continued on back)  
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