POLAR
PATTERN
PHASE COHERENT
CARDIOID
®
MICROPHONE
T
he Crown
®
PCC
®
-170SW 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 ap-
plications include churches, courtrooms and
council chambers.
The PCC-170SW has a silent-operating mem-
brane switch which is normally off. The switch
can be confi gured for touch on/off, momentary
on or momentary off operation. This confi gura-
tion is set by a bottom-mounted DIP switch. A
high-intensity LED lights when the unit is on.
The PCC-170SW is intended for multiple-
microphone use on a conference table where
each person wants control of his or her micro-
phone.
The microphone attenuates 70 dB when the
switch is in the off position. Since the micro-
phone capsule is placed on a boundary or
surface, direct and refl ected sounds arrive at
the diaphragm in-phase, resulting in a wide,
smooth frequency response free of phase inter-
ference. 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-170SW has a low-impedance
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 spe-
cial-ordered with a ¼-inch (6.35-mm) stereo
phone plug on the bottom of the base plate as
the PCC-170SWSPP.
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 particular applications.
Membrane Switch
The PCC-170SW membrane switch can be con-
fi gured to work three ways:
1.
Touch on/off.
Touch the switch to turn on
the mic; touch it again to turn off the mic.
2.
Momentary on.
Touch and hold the switch to
turn on the mic momentarily. Release the switch
to turn the mic back off.
3.
Momentary off.
Touch and hold the switch
to turn off the mic momentarily. Release the
switch to turn the mic back on. This option can
serve as a cough or privacy button.
After choosing the option you prefer, set the DIP
switches according to the label on the bottom of
the microphone (see Fig. 5). The LED in the mi-
crophone housing will light when the mic is on.
Specifi cations
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 = 0.0002 dyne/cm
2
), A-weighted.
S/N ratio:
72 dB at 94 dB SPL.
Maximum SPL:
120 dB SPL produces 3% THD.
Off Attenuation:
70 dB at 1 kHz.
Turn-on time:
250 msec.
Turn-off time:
125 msec.
Polarity:
Positive pressure on the diaphragm
produces 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:
6 mA nominal.
Connector:
Switchcraft TB3M in model PCC-170SW.
Bottom-mounted ¼-inch (6.35-mm) stereo phone
plug in model PCC-170SWSPP. 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:
Black.
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/cm
2
= 10 microbars = 94 dB SPL.
Features
Perfect for multimiking applications in telecon-
ferencing, distance learning, and boardrooms
Phase Coherent Cardioid
®
design prevents
coloration from surface sound refl ections
Half-supercardioid polar pattern reduces
ambient noise and room reverberation
Programmable on/off membrane switch
Balanced XLR output
PCC
®
-170SW
Fig. 1
Frequency in Hz
Frequency Response
Fig. 2
Horizontal-Plane Polar Response
Fig. 3
Vertical-Plane Polar Response