Akg PCC170 Bruksanvisning
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T
PHASEC O H E RE NT
CARDIOID
®
MICROPHONE
he A K G / C r o w n PCC170 (left) 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 include churches,
courtrooms and council chambers.
Because of its highly directional pickup pattern,
the PCC170 minimizes background noise and
feedback. 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 cancella-
tions. 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 PCC170 has a low-impedance mic-
level balanced output which permits long cable
runs without hum pickup or high-frequency loss.
The connector is a Switchcraft TB3M.
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.
The PCC170 SW Version (right) has
additionally a silent-operating programmable
membrane switch that can be configured for
touch ON/OFF, momentary ON or
momentary OFF. The PCC170 SW O looks
identical to the PCC170 SW but features a
pair of extra leads in the mic cable to allow
isolated remote sensing of the microphone
switch closure.
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 PCC170 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:
1. On the bottom of the microphone, find the
hole labeled HF ADJ. This trim pot adjusts the
high-frequency response as shown in Fig. 1.
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
typical (0 dB = .0002 dyne/cm
2
), 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 pro-
duces 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
Cable: 15-foot, black, two-conductor shielded
cable with Switchcraft TA3F and A3M connec-
tors.
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: A K G / Cro w n PH1A phantom
power supply (single channel, battery or AC
adapter powered), AKG / Crown PH4B phantom
power supply (4 channels, AC powered).
* 1 pascal = 10 dynes/cm
2
= 10 microbars = 94 dB SPL.
Fig. 1
Fig. 2
Fig. 3
Frequency Response
Frequency in Hz
Vertical-Plane Polar Response
Horizontal-Plane Polar Response
PCC170
PCC170 SW
PCC170 SW O
Produktspecifikationer
| Varumärke: | Akg |
| Kategori: | mikrofon |
| Modell: | PCC170 |
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