Crown PIP-XOV Owners manual

P.I.P.-XOV

Programmable Input Processor

REFERENCE

MANUAL

Obtaining Other Language Versions: To obtain information in another language about

the use of this product, please contact your local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.

This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance.

The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.

Trademark Notice:

IOC

and

the property of their respective owners.

P.I.P.

PIP and PIP2

are registered trademarks of Crown International. Other trademarks are

are trademarks and

Telephone: 574-294-8000

Crown, Macro-Tech, Com-Tech

,

125975-2

2/02

P.I.P.-XOV

Fig. 1.1 P.I.P.-XOV

1 Welcome

Thank you for purchasing the Crown

PIP

quickly install in the rear panel of many Crown amplifiers. PIP 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 P.I.P. -XOV is a versatile and economical mono crossover filter that plugs into Crown amplifiers with PIP compatibility. It provides high-pass and low-pass filters with 18 dB/octave (3rd order) slopes for bi-amp and tri-amp systems.

P.I.P.®-XOV

TM

modules are designed to

accessory.

Five two-position sliding switches make it easy for the user to select one of twenty-four modes of operation.

Plug-in resistor and capacitors make it easy to change the crossover frequencies.

Features

❏ 18 dB/octave high-pass and

low-pass filters.

❏ User-selectable Butterworth,

Bessel, or Chebyshev response.

❏ Fully protected from output

shorts.

❏ Unity gain. ❏ Very economical. ❏ Twenty-four modes of operation. ❏ Both 3-pin XLR connectors and

1

/4-inch phone jacks are provided

for input and output connection.

Page 3

BACC B A

P.I.P.-XOV

Page 4

S1 S2 S3 S4

S5

D E

Fig. 2.1 Front & Bottom Views

A

B

P.I.P.-XOV

2 Facilities

A. Thumb Screws

Use these two thumb screws to fasten the PIP to the amplifier. An E-ring prevents them from falling out.

B. Balanced Phone Jacks

A balanced 1/4-inch phone jack is provided at both the input and output of the P.I.P.-XOV. Each phone jack is parallel to its XLR connector counterpart.

C. XLR Connectors

A balanced 3-pin XLR connector is provided at both the input and output. A female connector is used for the input and a male connector is used for the output. These connectors are wired with pin 2 high and are parallel to their phone jack counterparts.

D. Mode Switches

Five slide switches (S1–S5) are used to configure the P.I.P.-XOV in any of its 24 different modes of operation. Each switch has two positions: A (up) and B (down). See the table in Figure

3.1 for a description of each mode and their respective switch settings.

E. User-Replaceable Components

Six resistors (R1–R6) and six capacitors (C1–C6) can be easily unplugged and replaced with components of different values to change both the crossover frequency and the response curve (Bessel, Butterworth, or Chebyshev).

Page 5

P.I.P.-XOV

3 Installation

Mode of Operation

Use switches S1 through S5 to configure the P.I.P.-XOV in the desired operating mode. The following five modes are just a sample of the twenty-four different modes which are available:

• Mode 3: High-pass to Ch. 1, lowpass to Ch. 2, unprocessed signal to the output connectors for daisy-chaining.

• Mode 5: Low-pass to Ch. 1, highpass to Ch. 2, unprocessed sig-

MODE

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

SWITCH SETTINGS FUNCTION

S1 S2 S3 S4 S5 CH. 1 CH. 2

A

B

A

B

A

B

A

B

A

B

A

B

A

B

A

B

A

X

A

X

A

X

B

A

B

A

B

A

B

nal to the output connectors for daisy-chaining.

• Mode 16: Band-pass to Ch. 1 for mono operation, with unprocessed signal to the output connectors for daisy-chaining.

• Mode 20: High-pass to Ch. 1 for mono operation, with low-pass signal routed to the output connectors.

• Mode 22: Low-pass to Ch. 1 for mono operation, with high-pass signal routed to the output connectors.

Figure 3.1 shows the switch settings and explanation of each mode. The

OUTPUT

A

X

B

A

B

A

B

A

B

A

B

A

B

A

B

LP

A

BP

B

HP

A

LP

B

LP

A

BP

B

HP

X

LP

A

BP

B

HP

A

LP

B

LP

A

BP

B

HP

X

LP

A

BP

B

HP

X

LP

A

BP

B

HP

A

LP

B

LP

A

BP

B

HP

LP

BP

HP

BP

HP

LP

BP

HP

BP

HP

MONO

CONNECTOR

FLAT

LP

BP

HP

BP

HP

X = A or B LP = Low-pass HP = High-pass BP = Band-pass

Page 6

Fig. 3.1 Twenty-Four Operating Modes

P.I.P.-XOV

output connector is provided as a convenient means for “daisy chaining” the signal from amplifier to amplifier. However, please note that modes 8–14 do put signal to the output connector.

Also note that modes 15–24 are to be used figured in one of its two mono modes (BRIDGE-MONO or PARALLEL-MONO). When the P.I.P.XOV is placed in one of these modes, no signal will be fed to the input of Channel 2.

Diagrams illustrating the connection of each mode are included in Appendix A to assist your selection.

not provide any out-

only with the amplifier con-

B e s s e l

A Bessel filter provides minimum phase distortion throughout its passband (i.e. the most constant signal delay), which is desirable for pulse-type waveforms, but has the poorest stopband attenuation of the three filter types.

Crossover Selection

The P.I.P.-XOV is factory-set for a crossover frequency of 800 Hz with a Butterworth response. Included with the PIP are additional resistors to change the crossover frequency to 100 or 500 Hz, and capacitors to change it to 1, 5 or 8 kHz.

Changing the filter type or its crossover frequency is simply a matter of plugging in resistors and capacitors of the desired values. Six resistors and six capacitors are socketed for this purpose (Figure 2.1).

Three filter types are available: Bessel, Butterworth, and Chebyshev. Each differs in its ability to provide ideal frequency response, a constant signal delay, and large stopband attenuation. A brief description of each type follows:

B u t t e r w o r t h

A Butterworth filter provides the flattest response in the passband with a moderate amount of stopband attenuation. This filter is most commonly used in crossover applications.

C h e b y s h e v

A Chebyshev filter has more attenuation in the stopband at the expense of ripple in the passband. For example, a 0.5 dB Chebyshev filter has attenuation varying from 0 dB to 0.5 dB in the passband, but has attenuation in the stopband greater than that of the other two filter types.

Page 7

P.I.P.-XOV

The formulas shown below calculate the correct component values for the low-pass and high-pass filters. The value of constants K1, K2 and K3 determine the filter type.

Notice that the value of resistors R1, R2 and R3 will always be equal. The same is true of capacitors C4, C5 and C6. Resistors R1–R5 should always be greater than 2 K ohms and less than 330 K ohms.

LOW-PASS

FILTER

HIGH-PASS

FILTER

Where:

Note: R1–R5 must all be > 2 K ohms and < 330 K ohms and R6 must be < 1 M ohm. All resistors are 0.25 watt, 1% and all capacitors are 10% film.

C1 =

R4 =

π = 3.14159 FL= Low-pass crossover frequency (Hz) FH= High-pass crossover frequency (Hz) R = R1 = R2 = R3 (ohms) C = C4 = C5 = C6 (farads)

K1

π

2 F R

L

1/K1

π

2 F C

H

Resistor R6 should always be less than 1 M ohm. The value of capacitors C4, C5 and C6 can be any arbitrary value so long as it allows R1–R6 to meet the above criteria.

All resistors should have a 1% tolerance and should be rated for

0.25 watt. All capacitors should

have a 10% tolerance and be of the film type.

C2 =

R5 =

K2

2 F R

π

L

1/K2

2 F C

π

H

C3 =

R6 =

K3

2 F R

π

L

1/K3

2 F C

π

H

Page 8

Filter Type K1 K2 K3

Bessel 0.988 1.423 0.2538 Butterworth 1.392 3.546 0.2024

0.1 dB Chebyshev 1.825 6.653 0.1345

0.25 dB Chebyshev 2.018 8.551 0.1109

0.5 dB Chebyshev 2.250 11.23 0.0895 1 dB Chebyshev 2.567 16.18 0.06428 2 dB Chebyshev 3.113 27.82 0.03113 3 dB Chebyshev 3.629 43.42 0.02533

Fig. 3.2 Resistor / Capacitor Selection Values