Crown PIP-EDCB Owners manual

P.I.P.

–

EDCb

b

EDC

Programmable
Input Processor (P.I.P.)

© 1997 by Crown International, Inc., P.O. Box 1000, Elkhart, IN 46515-1000
U.S.A. Telephone: [phone]. Fax: [phone].
produced by the Professional Audio Division of Crown International, Inc.
Trademark Notice:
registered trademarks of Crown International, Inc. Other trademarks are the
property of their respective owners.

Crown

CH-2 CH-1

PUSH

INPUT

®

,

Macro-Tech

INPUT

®

,

Com-Tech

PUSH

GND

P.I.P.

modules are

®

®

,

IOC

and

P.I.P.

®

3

12

are

Printed on

recycled paper.

125511-1

11/97

P.I.P.–EDCb

Page 2

P.I.P.–EDCb

EDC

Programmable
Input Processor (P.I.P.)

b

CH-2 CH-1

PUSH

INPUT

Fig. 1.1 P.I.P.-EDCb

1 Welcome

Thank you for purchasing the
Crown
modules are designed to
quickly install in the back of
many Crown amplifiers.
stands for “Programmable In­put Processor.” Their versatile
features expand the capabili­ties of your amplifier and en­able you to customize it for your
particular needs.

The
the-art error-driven compres­sion, signal-driven input com­pression with adjustable thresh­old and a configurable sub­sonic (high-pass) filter to each
input of your amplifier. Three
conditions can cause a com­pressor to activate: (1) if the
compressor receives an “er­ror” signal from the amplifier’s
input/output comparator (
circuitry, (2) if the input signal
exceeds its adjustable thresh­old, or (3) if an excessively large

P.I.P.-EDCb. P.I.P.

P.I.P.-EDCb

adds state-of-

P.I.P.

IOC

®

PUSH

INPUT

input signal level is sensed.

®

The compressor circuits acti­vate ahead of all preamp cir­cuitry resulting in low distor­tion.

Each channel’s compressor
can operate independently or
both channels can be tied to­gether causing the compres­sors to track each other.

Balanced XLR connectors are
provided for quick connection.

Feature Summary

❏ Error-driven compression

for each channel.

❏ Variable threshold, signal-

driven compression for
each channel.

❏ User-selectable fast/slow

)

attack and release times.

❏ Each compressor can be

turned off.

❏ Variable subsonic (high-

pass) filter.

GND

3

12

Page 3

P.I.P.–EDCb

ON

BCDCB

Fig. 2.1 P.I.P.-EDCb (Bottom View)

2 Facilities

S2

6789

12345

A

5

0

10

ON OFF

COMPRESSOR

TRACKING

A

5

S1

0

10

Z1

ON

6789

12345

A. Input Connectors

A balanced XLR connector is
provided for input to each chan­nel. The pin assignments are
labeled on the face of the
Refer to your amplifier

Manual

for wiring details.

CAUTION: Input channel 2
should NOT be used in either
mono mode, and its level con­trol should be turned off (fully
counterclockwise).

Page 4

P.I.P.

Owner’s

B. DIP Switches (S1, S2)

A nine-segment DIP switch is
provided for each channel.
Segments 1–6 select the sub­sonic corner frequency and
segments 7–9 configure the
compressor. S1 controls chan­nel 1; S2 controls channel 2.

C. Compressor Threshold

Each channel’s compressor
threshold can be adjusted with
these controls. They set the

P.I.P.–EDCb

maximum output voltage and
can be used to protect loud­speakers and listeners. When
turned to the maximum setting
(fully clockwise), the compres­sor responds only to the
channel’s
When set lower, the compres-

IOC

error signal.

sor responds to a maximum
audio level (see Figure 3.4).

D. Tracking Jumper (Z1)

Moving this jumper to the “ON”
position causes the compres­sors to track each other.

Page 5

3 Installation

Before installing the

it should first be configured.

ule,

3.1

P.I.P.

Configuration

1. Set the corner frequency (–3 dB
frequency) for each subsonic
filter with DIP switches S1 and
S2 (see Figure 3.2). Notice that
the first six switch segments
control the corner frequency.

12345ON6789

Fig. 3.1 S1/S2 DIP Switch

2. Use DIP switches S1 and S2
to configure each compres­sor’s attack and release
times (fast or slow), or turn
each compressor off (see

P.I.P.

mod-

P.I.P.–EDCb

Compressor

Setting

Slow Attack / Slow Release
Slow Attack / Fast Release

Fast Attack / Slow Release
Fast Attack / Fast Release

Approximate Time

Attack Release

5 msec

900 msec

10 msec

220 msec

1.25 msec

900 msec

1.5 msec

220 msec

Fig. 3.3 Compressor Attack and

Release Times (Approximate)

Figure 3.2). Notice that the
last three DIP switch seg­ments control attack and re­lease times. The actual attack
time depends on the release
time. Figure 3.3 provides ap­proximate times for each set­ting.

3. Adjust each channel’s com-
pressor threshold using the
compressor threshold pots
(see Figure 2.1, “C”). Each

Subsonic

Compressor

Page 6

Function

36 Hz Corner Frequency
32 Hz Corner Frequency
28 Hz Corner Frequency

Filter

24 Hz Corner Frequency
Slow Attack / Slow Release
Slow Attack / Fast Release

Fast Attack / Slow Release
Fast Attack / Fast Release

Compressor OFF

Fig. 3.2 S1/S2 DIP Switch Settings

DIP Switch (S1 or S2)

1

2

3

4

5

ON

ON

ON

ON

ON

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

OFF

OFF

OFF

OFF

OFF

ON

OFF

ON

OFF

6

7

8

9

OFF

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

ON

OFF

ON

ON

P.I.P.–EDCb

Mark

0

1

2

3

4

5

6

7

8

9

10

Macro-Tech 3600VZ

36x12

(Channel 1)

Max Sine

Wave RMS

Voltage

13.5
14

14.5
15
16
17
18
19
20
22
24
26
29
32
37
42
48
57
70
92
96

and

Watts into

8 Ohms

23
25
26
28
32
36
41
45
50
60
72

85
105
128
171
220
288
406
612

1058
1152

Max Sine

Wave RMS

Voltage

9.5
10

10.5
11

11.5
12
13
14
15
16
17
19
21
23
26
30
35
41
50
71

102

Fig. 3.4 Compressor Threshold Settings

All Others

Watts into

8 Ohms

11
12
14
15
17
18
21
25
28
32
36
45
55
66

85
113
153
210
313
630

1300

pot has a scale with ten marks
(or settings) which correspond
to the typical thresholds
shown in Figure 3.4.

P.I.P.’s

4. Move the

tracking
jumper (Z1) to the “ON” posi­tion to make the compressors
track each other. In the “OFF”
position, each compressor will
operate independently (refer
to Figure 2.1, “D”).

3.2 Installation Procedures

You may need a phillips screw­driver to remove the existing

P.I.P.

module or panel from your

amplifier.
CAUTION: Before connecting

this or any

P.I.P.

to your ampli­fier, it is important to turn its
level controls down, turn it off

Page 7

P.I.P.–EDCb

and remove the AC power. Don’t
touch the circuitry. Even though
the amplifier is off, there could
still be enough energy remaining
to cause electric shock.

BACK PANEL

OF AMPLIFIER

P.I.P.

MODULE

Fig. 3.5 Installation into a

Standard P.I.P. Amplifier

FROM AMPLIFIER

Q43528-1

B
A

A

18 PIN (B)

B

20 PIN (A)

Fig. 3.6 PIP2 Input Adapter

Connection

BACK PANEL

OF PIP2

AMPLIFIER

PIP2 CONNECTOR

BOARD

P.I.P.

MODULE

Fig. 3.7 Installation into a

PIP2 Amplifier

1. Turn down the level controls
(full counterclockwise), turn off
the amplifier and unplug it from
the AC power source.

2. Remove the existing

P.I.P.

module or panel (two screws).
For

PIP2

amplifiers, this may

involve disconnecting the

P.I.P.

from a

PIP2

input adapter

(see Figures 3.6 and 3.7). If a

PIP2

input adapter is already
present, do not remove the
ribbon cables from the
adapter. Otherwise you will
have to reconnect them in the
next step.

Standard P.I.P. Amplifiers

3.
Align the edges of the

EDCb

in the

P.I.P.

P.I.P.–

card rails
and firmly push the unit in until
it is seated against the
mounting bracket (see Figure

3.5).

PIP2 Amplifiers:
PIP2

input adaptor. Crown part

(Requires a

number Q43528-1.) Connect
the

PIP2

input adapter to the
two input cables of the
amplifier (see Figure 3.6).
Notice that the

PIP2

input
adapter should be positioned
with the

P.I.P.

edge connector
on top and facing away from
the amplifier. The 20 pin cable
(A) is connected first, then the
18 pin cable (B) is connected.
Both ribbon cables should
extend below the

PIP2

input

adapter.
Next, insert the edge

connector of the

P.I.P.–EDCb

:

Page 8

P.I.P.–EDCb

into the
Figure 3.7) and insert the
assembly into the
opening in the back of the
amplifier.

4. Secure the
the two screws and lock
washers provided. (The lock
washers are important
because they bond the
the chassis ground of the
amplifier.)

5. Connect input and output
wiring.

6. Plug in the amplifier and turn it
on. Adjust its level controls to a
desired setting.

Do not tamper with the circuitry.
Circuit changes made by unau­thorized personnel, or unautho­rized circuit modifications are not
allowed.

Remember: Crown is not liable
for any damage resulting from
overdriving other components in

your sound system.

PIP2

input adapter (see

P.I.P.–EDCb

P.I.P.

with

P.I.P.

to

CAUTION: IF PHONE JACKS
ARE PROVIDED ON THE AM­PLIFIER BACK PANEL, DO
NOT USE THEM AS INPUTS
WITH THIS

The amplifier phone jacks are in
parallel with the
they can be used to “daisy chain”
the inputs of several amplifiers. If
you do this, remember that the
signal feeding the other amplifi­ers will be filtered and com­pressed too.

Important: If the amplifier is used
in either Bridged-Mono or Paral­lel-Mono mode, you
the Ch. 2 amplifier level control
off (fully counterclockwise). The
input and level control of Ch. 2
are not defeated in mono mode
so any signal applied to Ch. 2 will
beat against the signal in Ch. 1.

Refer to the amplifier

Manual

about Bridged-Mono or Parallel­Mono modes of operation.

P.I.P.

INSTALLED.

P.I.P.

outputs, so

must turn

Reference

for more information

Page 9

Electronic image for this figure

were not included due to quality

considerations. Please refer to

the printed documentation.

P.I.P.–EDCb

Page 10

Only one channel shown.

P.I.P.–EDCb

Electronic image for this figure

were not included due to quality

considerations. Please refer to

the printed documentation.

Notes:

1. All resistor values are in ohms,

1

/8 W, 1% unless otherwise specified.

2. All capacitor values are in micro-farads unless otherwise specified.

Page 11

4 Specifications

Note: All specifications are refer­enced to a 0.775 volt input sig­nal.

Signal to Noise: Greater than 95
dB from subsonic filter corner
frequency to 20 kHz.

Frequency Response: ±0.1 dB
from 70 Hz to 30 kHz with sub­sonic filter corner frequency set
to 36 Hz. +0, –3 dB from sub­sonic filter corner frequency to
30 kHz.

Harmonic Distortion (THD):

Less than 0.01% THD at 1 kHz.

Common Mode Rejection:

Greater than 65 dB at 1 kHz.

Crosstalk: Less than 0.5 mV at
20 kHz.

Connectors: 3-pin female XLR
for each input.

Input Impedance: Nominally 30
K ohms balanced. 15 K ohms
unbalanced.

Maximum Input Level: 35 VAC.
Maximum Output Level:

+18

dB with 600 ohm load.
Nominal Gain: Unity ±0.5 dB.

3

Dimensions: 6

/8 x 17/8 x 37/8 in.

(16.2 x 4.8 x 9.8 cm).

For Technical Support contact:

Crown Audio Division Technical Support Group

Phone: [phone] (North America, Puerto Rico and Virgin Islands) or 219-294-8200

Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, Indiana 46517 U.S.A.

Fax: [phone] Fax Back (North America only): 800-294-4094 or 219-293-9200

Fax Back (International): 219-294-8100

Internet: http://www.crownaudio.com