Crown PCC-170 User manual

POLAR
PATTERN
PCC®-170
PCC-170W
PHASE COHERENT CARDIOID
MICROPHONE
Horizontal-Plane Polar Response
Fig. 3
Fig. 1 Frequency Response
The Crown®PCC-170 is a surface-
mounted supercardioid microphone of
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.
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.
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.
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.
The PCC-170W is finished in off-white to blend
with church altars and other surroundings where
the lighter color is appropriate.
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.
How to Set the Bass Tilt Switch
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.
• The FLAT position provides a flat low-frequency
response, for normal usage. The PCC-170 is
shipped from the factory in flat position.
• The CUT position rolls off the bass, useful in
noisy or boomy surroundings.
• The BOOST position boosts the bass for a more
natural sound when the mic is used on a small
surface such as a lectern.
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:
(Continued on back)
Specifications
Type: Phase Coherent Cardioid.
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.
Impedance: 150 ohms, balanced (recommended load
impedance 1000 ohms or greater).
Open circuit sensitivity (typical): 22 mV/Pa* (–33 dB
re 1 volt/Pa).
Power sensitivity: –30.5 dB re 1 mW/Pa*. EIA rating
–125 dBm.
Equivalent noise level (self-noise): 22 dB SPL typi-
cal (0 dB = .0002 dyne/cm2), A-weighted.
S/N ratio: 72 dB at 94 dB SPL.
Maximum SPL: 120 dB SPL produces 3% THD.
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.
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.
Cable: 15-foot, black, two-conductor shielded cable
with Switchcraft TA3F and A3M connectors. No
cable supplied with SPP option.
Materials: High-impact molded plastic and steel
mesh grille.
Finish: PCC-170: black. PCC-170W: off-white.
Net weight: 6 oz. (170 g).
Dimensions: See Figs. 4 and 7.
Optional accessories: Crown PH-1A phantom power
supply (single channel, battery or AC adapter
powered).
*1 pascal = 10 dynes/cm2= 10 microbars = 94 dB SPL.
Frequency in Hz
Features
Perfect for multimiking applications in telecon-
ferencing, distance learning, boardrooms and
courtrooms
Phase Coherent Cardioid design prevents color-
ation from surface sound reflections
Half-supercardioid polar pattern reduces
ambient noise and room reverberation
Small and inconspicuous
Available in black (PCC-170) or white (PCC-
170W)
Vertical-Plane Polar Response
Fig. 2

Crown International, Inc.
P. O. Box 1000
Elkhart, IN 46515-1000
TEL: [phone]
FAX: [phone]FAX
www.crownaudio.com
©2005 Crown Audio®, Inc. Specifications subject to
change without prior notice. Latest information avail-
able at www.crownaudio.com. Crown, Crown Audio,
PCC and Phase Coherent Cardioid are registered
trademarks of Crown international.
7/05 126257-4A
PCC-170
PCC-170W
1. On the bottom of the microphone, find the hole
labeled HF ADJ. This trim pot adjusts the high-fre-
quency response as shown in Fig. 1.
2. Using the supplied small screwdriver, turn the
pot clockwise for high-frequency boost (a brighter
sound); turn the pot counter-clockwise for high-
frequency rolloff (a duller sound).
Installation
Typical placement for each microphone is at arm’s
length from the user. Place one microphone in
front of each person or one between every two
people. The front of the microphone is indicated by
an arrow on the bottom of the base plate.
If the microphone is used on a lectern, place it
on an open surface, not in a cavity. Otherwise
the frequency response and polar pattern will be
degraded.
Connect the far end of the mic cable to the input of
a phantom power supply, such as a Crown PH-1A.
Connect the output of the phantom power supply
to a mixer mic input. Or, if your mixer has phan-
tom power built in, connect each mic cable directly
to a mixer mic input.
The PCC includes two keyhole slots in its base to
accept mounting screws. To screw the PCC to a
table top, follow this procedure:
1. Punch out the keyholes marked on the label
underneath the base plate (use a razor blade, small
screwdriver, etc.).
2. Using the template (Fig. 6), mark the location
of two holes in the table where you want to mount
the mic. These holes are 1.6 in. (4.06 cm) apart,
center-to-center. They are 2.2 in. (5.588 cm) from
the rear of the mic. See Fig. 5.
3. Screw two #8 woodscrews (.270-in. [0.686-
cm] dia. head) into the table at the locations you
marked.
4. Loosen the screws enough to receive the mic
and to hold it with a friction fit.
If your model is the SPP type, install 0.25-in.
(0.635-cm) phone jacks in your table. Fig. 7 shows
the optimum jack wiper locations.
Jack contacts should be close to these dimensions.
To mount a Switchcraft 152B thick-panel phone jack,
drill a 0.5-in. (1.27-cm) diameter hole with a 0.625-
in. (1.588-cm) diameter, 0.125-in (0.318-cm) deep
counterbore.
Architects’ and Engineers’ Specifications
The microphone shall be the Crown Model PCC-
170 (black) or PCC-170W (off-white) or equiva-
lent. The microphone shall be a half-supercardioid
electret condenser type, utilizing a subminiature
transducer of rugged construction.
The microphone shall employ the principle of
phase coherency achieved by mounting a small-
diameter element very near a boundary, thus elimi-
nating comb filtering in the audible spectrum. The
microphone will exhibit excellent off-axis response
and gain-before-feedback.
A 15-ft (4.6-m), two-conductor shielded cable with
TA3F and A3M connectors shall be supplied with
the microphone. As an option, the microphone
may be obtained with a bottom-mounted 0.25-in.
(0.635-cm) stereo phone plug (model PCC-
170SPP, no cable provided).
Nominal sensitivity shall be 22 mV/Pa. Maximum
SPL shall be 120 dB SPL for 3% THD. Equivalent
noise shall be 22 dBA nominal. Frequency re-
sponse shall be 50 Hz to 20,000 Hz with a uniform
off-axis response, over 20 dB down at the rear
nulls.
The Crown Model PCC-170 is specified.
Warranty
Crown professional microphones products are
guaranteed against malfunction for a period of
three years from date of original purchase. See en-
closed warranty sheet for additional information.
Service
If the microphone does not function properly,
check that it is aimed correctly and is configured
and connected as described in this data sheet.
Double check the DIP-switch settings. If there is
hum or no signal, first repair or replace the cable.
If you determine the microphone product(s) is
defective, order a replacement PCC-170 mic cap-
sule from Crown (part no. M43197-9) or return
the complete product in its original packaging
to: Crown Factory Service, 1718 W. Mishawaka
Road, Elkhart, IN 46617-9439. for further assis-
tance or technical support call 800-342-6939.
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Dimensions are to outside of plastic housing.