Instruction/ maintenance manual of the product 133472-1A Crown Audio
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1 Amplifi er Application Guide Amplifi er Application Guide © 2006 by Cro wn A udio ® Inc., 1718 W . Misha waka Rd., Elkhart, IN 46517-9439 U.S .A.
2 Amplifi er Application Guide The inf or mation fur nished in this manual does not include all of the details of design, production, or v ariations of the equipment. Nor does it cov er e very possible situation which ma y ar ise during installa- tion, operation or maintenance .
3 Amplifi er Application Guide T able of Contents Introduction .................................................................................................. 4 Chapter 1: Crown Amplifi ers In-Depth ...............................................
4 Amplifi er Application Guide Intr oduction This application guide provides useful inf or mation designed to help you best use your ne w Crown ® amplifi er . It is designed to complement your amplifi er’ s Operation Manual , which describes the specifi c features and specifi cations of your amplifi er .
Chapter 1: Crown Amplifi ers In-Depth 5 Amplifi er Application Guide In This Chapter • Rack Cooling • System Wir ing • Amplifi er Load Impedance • Multi-W ay Systems • Distributed Speak er Systems • Setting System Gain Structure T his chapter provides inf or mation to help you get optimum perf or mance from your Cro wn amplifi er .
6 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide sides) is not bloc ked or cov ered by cab les. Also , if y our Crown amp has f oam fi lters , they can be cleaned with mild dish detergent and water when needed.
Chapter 1: Crown Amplifi ers In-Depth 7 Amplifi er Application Guide 1.2 System Wiring The inf or mation in this section cov ers making input and output wir ing connec- tions, as w ell as troubleshooting prob lems relating to system wir ing.
8 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide Unbalanced, Grounded Sour ce , T win-Lead Shielded Cable F or use with components equipped with three-wire grounded A C line cord or other ground connection.
Chapter 1: Crown Amplifi ers In-Depth 9 Amplifi er Application Guide 1.2.2 Solving Input Prob lems Infrasonic (Subaudible) Frequencies Sometimes large infrasonic (sub- audible) frequencies are present in the input signal. These can damage loudspeakers b y ov er loading or ov erheating them.
10 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide 1.3 Output Wiring 1.3.1 Output Connector Wiring 5-W ay Binding P ost If the amplifi er is set f or Stereo (Dual), connect the positive (+) and negative (–) leads of each loudspeaker to the appropri- ate Channel 1 and Channel 2 output connectors as shown in Figure 1.
Chapter 1: Crown Amplifi ers In-Depth 11 Amplifi er Application Guide Barrier Block If the amplifi er is set f or Stereo (Dual), connect the positive (+) and negativ e (–) leads of each loudspeaker to the appropriate Channel 1 and Channel 2 output connectors as shown in Figure 1.
12 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide 3b . If the Mode switch is in the “Stereo” posi- tion (f or stereo con- fi guration), connect the positiv e (+) and negativ e (–) leads of each wire to the appropriate Chan- nel 1 and Channel 2 connectors as shown in Figure 1.
Chapter 1: Crown Amplifi ers In-Depth 13 Amplifi er Application Guide T o connect the Speakon plug into the mating connector on the speaker , line up the notches between the inser t and the mating connector , then inser t the plug and tur n one quar ter-tur n clockwise as shown in Figure 1.
14 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide Each speaker has an impedance rating, typically 4 or 8 ohms. Connect- ing one 8-ohm speaker to an amplifi er channel presents an 8-ohm impedance to the channel.
Chapter 1: Crown Amplifi ers In-Depth 15 Amplifi er Application Guide 1.3.3 Determining Appr opriate Speaker Wire Gaug e Y ou should choose loudspeaker cab les with suffi cient gauge (thic kness) f or the length being used.
16 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide T wo different types of fuses are required f or ther mal protection and v oltage protection. Slow-b low fuses are usually selected to protect loudspeakers from thermal damage because they are similar to loudspeakers in the w ay the y respond to ther mal conditions ov er time.
Chapter 1: Crown Amplifi ers In-Depth 17 Amplifi er Application Guide 4. Nev er connect the amplifi er’ s input and output grounds together . 5. Nev er tie the outputs of multiple amplifi ers together . 6. Keep loudspeak er cables well separated from input cab les.
18 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide le vel to driv e the speaker , and are connected across the wires (see Figure 1.
Chapter 1: Crown Amplifi ers In-Depth 19 Amplifi er Application Guide Figure 1.27 T ypical Single-Amp, Stereo, T wo-Way Hookup Figure 1.28 T ypical T wo-Amp, Bridge-Mono, T wo-Way Hookup.
20 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide Figure 1.29 T ypical Three-Amp, Bridge-Mono, Three-Way Hookup Figure 1.30 Fault Status External Circuit Design When you use an activ e crossov er to split the pow er drive to the loudspeak er components, y ou gain a wide range of advantages , including: 1.
Chapter 1: Crown Amplifi ers In-Depth 21 Amplifi er Application Guide 1.5 F ault Monitoring The F ault (RJ-11) jack, which looks like a telephone plug, is located on the back of y our amplifi er (if equipped). It gives y ou an easy wa y to remotely monitor the amplifi er’ s f ault status.
22 Chapter 1: Crown Amplifi ers In-Depth Amplifi er Application Guide 1.6.1 System Levels When setting system gain, star t at the front of the system and work your wa y toward the amplifi er . A system with the low est noise fl oor and maximum o v erall gain will ha ve most of its gain early in the signal chain.
Chapter 2: T roub leshooting 23 Amplifi er Application Guide In This Chapter • T roubleshooting Flo wchar ts T his section provides fl o wchar ts to assist you in troub leshooting problems with your amplifi er . In some situations the problem ma y not be with the amplifi er , but r ather ma y be caused by a system condition.
24 Chapter 2: T roub leshooting Amplifi er Application Guide Figure 2.2 No Power 2.1 No P ower No Powe r I s the P ow er (Enabl e) sw itch o n? I s am p plugged in to the AC sour ce? P lug am p in to the AC source . Turn the Pow er (Enabl e) sw itch on.
Chapter 2: T roub leshooting 25 Amplifi er Application Guide Figure 2.3 No Sound 2.2 No Sound No Sou n d Ar e th e le v e l contr ols turned up? A re signal ind ica to r s bli nki ng? Chec k si gnal s ource for adequate output . Turn up level control s unti l you hear out put.
26 Chapter 2: T roub leshooting Amplifi er Application Guide Figure 2.4 Bad Sound Figure 2.5 Amp Overheating Am p Ov e r he atin g Is t h e a m p operating w ithi n its r a te d im pedance? A re the fil ters (if equi pped) cl ogged? Cl ean or replace filters.
Chapter 3: Glossar y of T erms 27 English Amplifi er Application Guide In This Chapter • Glossar y of T er ms T his section provides a handy glossary of ter ms used in the discussion of profes- sional audio amplifi ers. Some ter ms are unique to Crown amplifi ers .
2 8 Chapter 3: Glossar y of T erms Amplifi er Application Guide Bus In audio terms, a Bus is a point in a circuit where many sig- nals are brought together . F or e xample: Most electronic items hav e a Ground Bus where all of a device’ s individual ground paths are tied together .
Chapter 3: Glossar y of T erms 29 English Amplifi er Application Guide manif ests itself as some type of hum, static, or b uzz. Such electromagnetic fi elds are produced by fl uorescent lights, pow.
3 0 Chapter 3: Glossar y of T erms Amplifi er Application Guide I Load/ I Limit Indicator An indicator of some Crown amplifi ers that shows current fl ow to the loudspeakers (“current load”) and the maxim um cur- rent av ailable from the amplifi er (“current limit”).
Chapter 3: Glossar y of T erms 31 English Amplifi er Application Guide the amplifi er that allows a single input to f eed two combined output channels in order to provide a single output with twice the current of an individual channel in Stereo or Dual mode.
3 2 Chapter 3: Glossar y of T erms Amplifi er Application Guide Sound Pressure Level (SPL) The acoustic volume or perceiv ed loudness of sound, measured in decibels.
Appendix: Suggested Reading 33 English Amplifi er Application Guide T his Appendix provides a a list of suggested pub lications for fur ther reading about prof essional audio .
34 Appendix: Suggested Reading Amplifi er Application Guide NORTH AMERICA SUMMAR Y OF W ARRANTY The Crown A udio Division of Crown Inter national, Inc.
Appendix: Suggested Reading 35 Amplifi er Application Guide WORLD WIDE SUMMAR Y OF W ARRANTY The Crown A udio Division of Crown Inter national, Inc., 1718 W est Mishaw aka Road, Elkhar t, Indiana 46517-4095 U .
An important point after buying a device Crown Audio 133472-1A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Crown Audio 133472-1A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Crown Audio 133472-1A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Crown Audio 133472-1A you will learn all the available features of the product, as well as information on its operation. The information that you get Crown Audio 133472-1A will certainly help you make a decision on the purchase.
If you already are a holder of Crown Audio 133472-1A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Crown Audio 133472-1A.
However, one of the most important roles played by the user manual is to help in solving problems with Crown Audio 133472-1A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Crown Audio 133472-1A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
