Crown PIPATNB Owners manual
B
ATN
Programmable
Input Processor (P.I.P.)
+– –
ATTENUATION ATTENUATION
9
8
11
12
7
14
6
16
18
21
24
30
5
4
3
2
1
.5
50
0
∞
dB
12
14
16
18
21
24
30
50
∞
9
11
dB
CH-2 INPUT CH-1 INPUT
+
8
7
6
5
4
3
2
1
.5
0
© 1996 by Crown International, Inc., P.O. Box 1000, Elkhart, IN 46515-1000
U.S.A. Telephone: 219-294-8000. Fax: 219-294-8329. Crown
are produced by the Professional Audio Division of Crown International, Inc.
Trademark Notice:
Crown
®
,
Com-Tech
®
,
Macro-Tech
®
and
P.I.P.
modules
P.I.P.
®
are
registered trademarks of Crown International, Inc. Other trademarks are the
property of their respective owners.
100667-1
9/96
P.I.P.–ATNB
B
ATN
Programmable
Input Processor (P.I.P.)
+– –
ATTENUATION ATTENUATION
9
8
11
12
7
14
6
5
16
18
21
24
30
4
3
2
1
.5
50
0
∞
dB
14
16
18
21
24
30
50
11
12
∞
dB
+
9
8
7
6
5
4
3
2
1
.5
0
CH-2 INPUT CH-1 INPUT
BABA
Fig. 1.1 Front View
S2 S1
FLAT
50 Hz
100 Hz
OFF / ON
EQ2
300 Hz
OFF / ON
OFF
ON
EQ1
Page 2
D
DC
Fig. 1.2 Bottom View
P.I.P.–ATNB
1 Welcome
Thank you for purchasing the Crown
P.I.P.–ATNB
accessory.
grammable Input Processor) modules are designed to quickly install in
the rear panel of Crown
Macro-Tech
®
or
Studio Reference
ries amplifiers. Their versatile features expand the capabilities of your
amplifier and enable you to customize it for your particular needs.
Y ou should find these items when you
unpack:
P.I.P.–ATNB Module
Two 8-32 Phillips Machine Screws
Two Lock Washers
Two Quick-Disconnect Barrier
Blocks
This Reference Manual
Features
❏ Balanced inputs with 1:1 isolation
transformers to minimize input noise.
❏ RFI filter for attenuation of unwanted
ultrasonic frequencies. The RFI filter
is a 12 dB/octave, Bessel-tuned lowpass filter with a 3 dB roll-off point at
33 kHz.
❏ Switchable subsonic/bass filter with
the following settings: flat, 50, 100, or
300 Hz roll-off.
❏ Switchable constant-directivity horn
equalization network.
❏ Calibrated 21 position attenuators
give accurate level control of the input signal.
❏ Removable barrier block connectors
provide greater wiring flexibility and
easy installation.
®
P.I.P.
(Pro-
Com-Tech
se-
Facilities
A. Balanced Input
These removable barrier-block connectors (Figure 1.1) make it quick
and easy to attach an input cable
®
with just three screws. Once the
,
cable is attached, the connector can
be quickly unplugged and, if desired,
moved to a different amplifier.
B. Input Attenuators
Each channel has a calibrated attenuator (Figure 1.1) for accurate
level adjustment. They have 21
detented positions which “click” into
place for ease of use.
C. Subsonic/Bass Switch
A 4-position slide switch for each
channel (Figure 1.2) controls the subsonic/bass filter. This filter is an 18
dB/octave Butterworth high-pass filter which can be selected to attenuate frequencies below 50 Hz, 100 Hz
or 300 Hz. It can also be switched off
(FLAT). The switch positions are labelled on the circuit board between
the two switches.
D. Horn Equalization Jumper
A jumper is provided for each channel (Figure 1.2) to enable/disable the
constant-directivity horn equalization.
The jumper for channel 1 (EQ1) is
shown in the ON position while the
channel 2 jumper (EQ2) is shown in
the OFF position. This equalization
circuit is a 6 dB/octave shelving network with a 3 dB rise at 3.2 kHz and
a peak boost of 12.5 dB at 24 kHz.
Page 3
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