Table of Contents
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Table of Contents
Related Manuals for Crown Pulse 4X300
Summary of Contents for Crown Pulse 4X300
- Page 1 Professional Power Amplifier User Manual...
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Page 2: Table Of Contents
6.0 Indicators ...10 A. AC Present ... 10 B. Operate ... 10 C. Fault ... 10 D. Temp 1-2 & 3-4 ... 10 E. Signal ... 11 F. Clip ... 11 G. Bridge ... 11 7.0 Typical applications ... 12 a. -
Page 3: Important Safety Instructions
PROTECTIVE GROUND OR SIGNAL CABLE SHIELD CONNECTIONS TO PREVENT GROUND LOOPS. ANY SUCH DISCONNECTIONS ARE OUTSIDE THE RECOMMENDED PRACTICE OF CROWN AND WILL RENDER ANY EMC OR SAFETY CERTIFICATION VOID. For continued compliance with international EMC legislation ensure that all input cables are... -
Page 4: Introduction & Unpacking
Unpacking As part of the Crown system of quality control, we check every product carefully before packing to ensure that it reaches you in flawless condition. Before you go any further, please check the unit for any physical damage and retain the shipping carton and all relevant packing materials for use, should the unit need returning. -
Page 5: Mechanical Installation
2 . 0 Mounting & unit dimensions If the unit is likely to undergo extreme vibration through trucking and touring, front rack ear reinforcement brackets and rear mounting plates must be fitted. These are available from your dealer. Damage caused by insufficient support is not covered by the warranty. -
Page 6: Ac Power Connection
Green and Yellow...Ground Blue...Neutral Brown...Live/Hot IMPORTANT: The PULSE 4x300 is designed to use 50/60Hz AC power. Acceptable AC input supply voltage ranges from 180V to 265V The application of voltages above those specified may cause permanent damage that is not covered by your warranty. -
Page 7: Audio Connections
Unbalanced operation When feeding the PULSE 4x300 from unbalanced sources, connect the signal conductor to pin 2 of the XLR or the phone jack TIP, with the cable screen going to pins 1 and 3 of the XLRs or the SLEEVE and RING (if avaialable) of the phone jack. -
Page 8: Outputs
Outputs Your Pulse 4x300 amplifier can be fitted with either ® binding post or Speakon connectors for each channel. Note that it is possible to lever the caps out of the ends of the binding posts to insert 4mm banana type plugs but this will invalidate the product safety approvals in some territories. -
Page 9: Control Operation
5 . 0 a. Power Switch Pressing this switch so that the white dot is closest to the front panel signals to the microprocessor that the user wishes to turn on the power supply. Note that the microprocessor will only switch the power supply on once it has assured that there are no internal faults. -
Page 10: Indicators
This may either continue indefinitely (for example a shorted output in bridge mode) or stop after a number of attempts. D. Temp 1-2 & 3-4 These lights come on if the microprocessor detects that the corresponding channel’s heatsink has ex- ceeded the maximum allowed temperature. -
Page 11: Signal
I n d i c a t o r s . . . E. Signal This indicator lights when a signal exceeding approximately -26dBu is applied to a channel. In bridge mode only the channel 1 and/or channel 3 light operate(s). F. -
Page 12: Typical Applications
Four Channel Sound Reinforcement In this example, each channel of the PULSE 4x300 is being used independently to control the sound level in all four corners of a venue. For this application, ensure that both rear panel BRIDGE switches are in the NORMAL position. -
Page 13: Three Channel Operation
Four Channels Driving Two Actively Crossed 2 Way Monitors Capable of driving a pair of 2 way monitors, the PULSE 4x300 is great for tour sound. As all channels are used independently in this application, the speakers may be 2 ohm impedance if required. See section 7e of this manual for more information about how to calculate impedance. -
Page 14: Calculating Impedance
8 & 8 = 4 or to take this further, four 8 ohm drivers = 2 ohms (8 & 8 = 4 ... 8 & 8 = 4 ... 4 & 4 = 2). -
Page 15: Glossary
8 . 0 G l o s s a r y In this section many of the terms used throughout this manual are explained in more detail. Active Active electronic circuits are those which are capable of voltage and power gain by using transistors and integrated circuits. - Page 16 G l o s s a r y . . . dBu or dBv The addition of a lower case ”u” or “v” after dB indicates an absolute scaling for the dB ratio. 0dBu (or 0 dBv) = 778mV or 0.778 Volts, and it has no regard for power or impedance. This term is widely used for expressing signal voltages in modern audio equipment with high input impedances and low output impedances.
- Page 17 G l o s s a r y . . . Transient A sudden burst of energy in an audio signal which only lasts for a small period of time relative to the rest of the signal. The level of these transients can often reach 10 times (+20dB) or so above the normal operating level of the audio equipment, and may cause distortion if headroom is inadequate.
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Page 18: Power Ratings
9 . 0 Power Ratings Pulse 4x300 Stereo Measured per channel, both channels driven at 1kHz to no more than 0.1% THD+N 8 ohms 170W rms 4 ohms 300W rms 2 ohms 330W rms* * Note: 2 ohm spec is at 1% THD... -
Page 19: Troubleshooting
Are the input connectors properly wired? Are you using an unbalanced input? Does the noise stop if the equipment driving the amp is switched off? T r o u b l e s h o o t i n g... -
Page 20: Status Indication
1 hour without an input signal, check the rear panel fuse. If the fuse is blown and a replacement also fails (or the fault persists), return the amplifier to an authorized service center. Information is in the Service & Warranty section. -
Page 21: Worldwide Service
Crown Technical Support to verify the need for servicing. This unit has very sophisticated circuitry which should only be serviced by an authorized Crown Service Center.. This is one reason why each unit bears the following label: CAUTION: To prevent electric shock, do not remove covers. - Page 22 Warranty. ITEMS EXCLUDED FROM THIS CROWN WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts.
- Page 23 Version 2.0 CB 190901 ZM10091-01 Crown part number 133783-1 Crown is a registered trademark of Crown International. Other trademarks are the property of their respective owners A division of Harman International Industries...
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