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Crown PIP-AMCB Reference Manual
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Crown PIP-AMCB Reference Manual

Crown pip-amcb input processors: reference guide
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P . I.P . – AMCb
AMC
Programmable
Input Processor (P.I.P.)
©2003 by Crown Audio, Inc., P.O. Box 1000, Elkhart, IN 46515-1000 U.S.A. Tele-
phone: 574-294-8000. Fax: 574-294-8329. Trademark Notice: PIP, PIP2 and Studio
Reference are trademarks and Crown , Macro-Tech , Com-Tech , IOC and P.I.P. are
registered trademarks of Crown International. Other trademarks are the property of
their respective owners.
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 574-294-8200.
Note: 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.
Printed on
recycled paper.
O U T P U T
I N P U T
3
GND
1
2
100403-4
8/03

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Summary of Contents for Crown PIP-AMCB

  • Page 1 ©2003 by Crown Audio, Inc., P.O. Box 1000, Elkhart, IN 46515-1000 U.S.A. Tele- phone: 574-294-8000. Fax: 574-294-8329. Trademark Notice: PIP, PIP2 and Studio Reference are trademarks and Crown , Macro-Tech , Com-Tech , IOC and P.I.P. are registered trademarks of Crown International. Other trademarks are the property of their respective owners.
  • Page 2 P.I.P.–AMCb Page 2...
  • Page 3 Crown’s P.I.P. ® –AMCb . PIP are designed to quickly install in the back of many Crown amplifiers. PIP stands for “Programmable Input Pro- cessor.” Each PIP has features that ex- pand the capabilities of your amplifier, enabling you to customize it for your particular needs.
  • Page 4 Programmable Input Processor (P.I.P.) THRESHOLD Page 4 O U T P U T I N P U T CROSSOVER SIP1 SIP2 HI EQ CH2 OUT CH1 OUT COMP CONTROL Fig. 2.1 Front & Bottom Views P.I.P.–AMCb BOX EQ THRESHOLD...
  • Page 5 P.I.P.–AMCb 2 Facilities A. Thumb Screws Use these thumb screws to fasten the PIP to the amplifier. A circlip prevents them from falling out. B. Auxiliary SIP sockets The two auxiliary SIP sockets hold spare crossover SIP resistors. SIPs with values of 33, 20 and 10 kohm are pro- vided.

  • Page 6: Installation

    3 Installation Before installing any P.I.P. in your am- plifier, turn down the amplifier’s level controls, turn off the amplifier and disconnect the AC power. Even though the amplifier is off, there could still be enough energy in the circuitry to cause electric shock. Crossover Selection The crossover is a fourth-order Link- witz-Riley type with state-variable to-...
  • Page 7 P.I.P.–AMCb CHANNEL 1 –6 –12 FREQUENCY (Hz) Fig. 3.2 Crossover Frequency Response (800 Hz) Low-Frequency EQ After the crossover, low frequencies are equalized by a second-order high pass filter with a Q of 2. Such a filter is specified by Thiele more recent paper by Keele it is used to form a sixth-order Butterworth high pass response with...
  • Page 8 FLAT –6 Fig. 3.5 Low-Frequency EQ Response Curves Constant-Directivity Horn EQ After the crossover, the high-fre- quency band is equalized for the in- herent roll-off in constant-directivity horns. Both a first-order shelving net- work and a second-order low pass fil- ter are provided.
  • Page 9 P.I.P.–AMCb HORN EQ = 1.8 kHz –6 –12 –18 FREQUENCY (Hz) HORN EQ = 2.4 kHz –6 –12 –18 FREQUENCY (Hz) HORN EQ = 4 kHz –6 –12 –18 FREQUENCY (Hz) Fig. 3.7a High-Frequency EQ Response Curves (800 Hz Crossover) –6 –12 –18...
  • Page 10 HORN EQ = 10 kHz –6 –12 –18 FREQUENCY (Hz) Fig. 3.7b High-Frequency EQ Response Curves (800 Hz Crossover) Compressor Threshold Tracing the signal path, the compres- sors follow the crossover and equal- izers. Variable-threshold signal- driven compressors are provided for both the high and low frequencies, but by default, the compressors are error-driven.
  • Page 11 P.I.P.–AMCb THRESHOLD CONVERSION W @ 2Ω W @ 4Ω W @ 8Ω RMS Volts 32.5 16.2 8.12 8.06 34.9 17.4 8.72 8.35 37.5 18.7 9.37 8.66 40.3 20.1 10.1 8.98 43.3 21.6 10.8 9.31 46.5 23.3 11.6 9.65 50.0 25.0 12.5 10.0 53.7...
  • Page 12 CH1 & CH2 COMPRESSOR THRESHOLD SETTINGS Switch Settings Note: Threshold voltages and power levels are only valid for Dual (stereo) and Parallel-Mono modes of operation. Voltages shown must be doubled for Bridge-Mono mode. Fig. 3.9a Compressor Threshold Settings Page 12 Threshold* MA-3600VZ 107.5...
  • Page 13 P.I.P.–AMCb CH1 & CH2 COMPRESSOR THRESHOLD SETTINGS Switch Settings Also Note: To use the P.I.P.–AMCb as a "clip" eliminator, set all six switches ON. Remember, the Macro-Tech 5000VZ also has a built-in compressor! Only use one at a time. Fig. 3.9b Compressor Threshold Settings Threshold* MA-3600VZ (RMS Volts)

  • Page 14: Compressor Control

    Output Channel Control The P.I.P.–AMCb provides several options for routing high and low fre- quency signals from each of its two output channels to the amplifier in- puts. The “CH OUT” jumpers are used to set this (see Figure 2.1). These jumpers can be set so that each amplifier channel is supplied with either the high- or low-frequency...

  • Page 15: Input/Output Wiring

    P.I.P.–AMCb Input/Output Wiring A balanced mono input is provided via a female 3-pin XLR connector where pin 1 is ground, pin 2 is noninverting, and pin 3 is inverting. Figures 3.11 and 3.12 illustrate this: – INPUT Fig. 3.11 Balanced Input Wiring SHIELD INPUT Fig.
  • Page 16 Fig. 3.13 Installation into a Standard PIP Amplifier Page 16 PIP2 Amplifiers: (Requires a PIP2 input adapter. Crown part number Q43528-1.) Connect the PIP2 input adapter to the two input cables of the amplifier (see Figure 3.14). No- tice that the PIP2 input adapter...
  • Page 17 Do not tamper with the circuitry. Circuit changes made by unauthorized per- sonnel, or unauthorized circuit modifi- cations are not allowed. Remember: Remember: Remember: Crown is not liable for Remember: Remember: any damage resulting from overdriv- ing other components in your sound system.

  • Page 18: Specifications

    4 Specifications Signal to Noise Ratio: Greater than 85 dB (equivalent input noise) from 20 Hz to 20 kHz. Common Mode Rejection: Greater than 90 dB at 60 Hz; greater than 60 dB at 20 kHz. Crosstalk: Greater than 46 dB below the signal level at 20 kHz.
  • Page 19 P.I.P.–AMCb Notes: Page 19...
  • Page 20 For Technical Support contact: Crown Audio Technical Support Group 1718 W. Mishawaka Rd., Elkhart, Indiana 46517 U.S.A. Phone: 800-342-6939 (North America, Puerto Rico and Virgin Islands) or 574-294-8200 Fax: 574-294-8301 Internet: http://www.crownaudio.com...