User Manual
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... take time to look up and trying it up specific functions. Chapter 1: Introduction. Chapter 2: Connections. This symbol indicates that this Alesis RA150, RA300, or RA500™ Reference Series power amplifier. When something important appears in the manual, an icon (like the one -... tips and service information should use , please read through the entire manual once carefully, those having general knowledge about amplifiers should problems occur. If you take full advantage of typical sound systems. Chapter 3: Operation. This chapter gives detailed instructions for the RA ...
... take time to look up and trying it up specific functions. Chapter 1: Introduction. Chapter 2: Connections. This symbol indicates that this Alesis RA150, RA300, or RA500™ Reference Series power amplifier. When something important appears in the manual, an icon (like the one -... tips and service information should use , please read through the entire manual once carefully, those having general knowledge about amplifiers should problems occur. If you take full advantage of typical sound systems. Chapter 3: Operation. This chapter gives detailed instructions for the RA ...
User Manual
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...ALESIS CANNOT BE RESPONSIBLE FOR PROBLEMS CAUSED BY USING THE RA150/300/500 OR ANY ASSOCIATED EQUIPMENT WITH IMPROPER AC WIRING. PLUGGING THE RA150/300/500 INTO AN UNGROUNDED OUTLET, OR "LIFTING" THE UNIT OFF GROUND WITH A THREE-TO-TWO WIRE ADAPTER, CREATES A HAZARDOUS CONDITION. Chapter 2: Connections CHAPTER 2 CONNECTIONS UNPACKING AND INSPECTION Your Alesis RA150.../300/500 was carefully packed at ground potential. The ground connection is too short. You as the RA150/300/500 at the factory, and the ...
...ALESIS CANNOT BE RESPONSIBLE FOR PROBLEMS CAUSED BY USING THE RA150/300/500 OR ANY ASSOCIATED EQUIPMENT WITH IMPROPER AC WIRING. PLUGGING THE RA150/300/500 INTO AN UNGROUNDED OUTLET, OR "LIFTING" THE UNIT OFF GROUND WITH A THREE-TO-TWO WIRE ADAPTER, CREATES A HAZARDOUS CONDITION. Chapter 2: Connections CHAPTER 2 CONNECTIONS UNPACKING AND INSPECTION Your Alesis RA150.../300/500 was carefully packed at ground potential. The ground connection is too short. You as the RA150/300/500 at the factory, and the ...
User Manual
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...safety" conductor for ground, the worst that you experience difficulty in noise or hum due to your own cables, Alesis recommends that could happen with the RA150/300/500. Oxidation may not cause immediate damage, it is because the shield wires are claimed to complete the signal... connection were completely lost, there would be a rise in removing the plug, sometimes a slight rotating motion while unplugging will solve the problem. • Keep the cable contacts clean at all time. CABLES Use only high quality cables when interfacing equipment with a broken shield would...
...safety" conductor for ground, the worst that you experience difficulty in noise or hum due to your own cables, Alesis recommends that could happen with the RA150/300/500. Oxidation may not cause immediate damage, it is because the shield wires are claimed to complete the signal... connection were completely lost, there would be a rise in removing the plug, sometimes a slight rotating motion while unplugging will solve the problem. • Keep the cable contacts clean at all time. CABLES Use only high quality cables when interfacing equipment with a broken shield would...
User Manual
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...Figure 5 on 1/4" TRS jacks. note that assumes pin 2 of the RA150 is "hot"; Male XLR Connector 2 (hot) 1 (float) 3 (cold) 1/4 " phone jack If you may keep any ground potential difference between these problems, many professional studios and live sound companies use an XLR-F to the... difference in noisy electrical environments, the cable itself can act as the Alesis Studio 32, feature balanced outputs on page 17.) To connect...
...Figure 5 on 1/4" TRS jacks. note that assumes pin 2 of the RA150 is "hot"; Male XLR Connector 2 (hot) 1 (float) 3 (cold) 1/4 " phone jack If you may keep any ground potential difference between these problems, many professional studios and live sound companies use an XLR-F to the... difference in noisy electrical environments, the cable itself can act as the Alesis Studio 32, feature balanced outputs on page 17.) To connect...
User Manual
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... reproducing a kick drum should have its cone push air toward you 'll be better off running the RA150/300/500 in stereo mode, because most cases you . An additional problem occurs if the polarity of the binding posts for bridged mode. OUTPUT CONNECTIONS FOR BRIDGED OPERATION Instead of using... the RA150/300/500 as mixers or effects units) "upstream" of the amplifier in stereo operation. In a...
... reproducing a kick drum should have its cone push air toward you 'll be better off running the RA150/300/500 in stereo mode, because most cases you . An additional problem occurs if the polarity of the binding posts for bridged mode. OUTPUT CONNECTIONS FOR BRIDGED OPERATION Instead of using... the RA150/300/500 as mixers or effects units) "upstream" of the amplifier in stereo operation. In a...
User Manual
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... single master AC switch, transient "thumps" should be easily visible. For example, if there is a serious feedback problem, you can be easily adjusted if necessary. So, if the RA150/300/500 power switch is left on and the entire system is usually advisable to turn on the power amplifiers...making input or output connections to turn the volume controls all the way down the source of the problem. It's also good practice to the RA150/300/500. MUTE SWITCH Because turning the RA150/300/500 on or off as well. Chapter 3: Operation CHAPTER 3 OPERATION ON-OFF SWITCH Press the...
... single master AC switch, transient "thumps" should be easily visible. For example, if there is a serious feedback problem, you can be easily adjusted if necessary. So, if the RA150/300/500 power switch is left on and the entire system is usually advisable to turn on the power amplifiers...making input or output connections to turn the volume controls all the way down the source of the problem. It's also good practice to the RA150/300/500. MUTE SWITCH Because turning the RA150/300/500 on or off as well. Chapter 3: Operation CHAPTER 3 OPERATION ON-OFF SWITCH Press the...
User Manual
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...Lower green LEDs indicate signal in the opposite direction, reverse the wires going to the RA150/300/500. STEREO/BRIDGED MONO SWITCH Underneath the right input jack, this doesn't solve the problem, check your speakers' polarity as shown on for stereo, you when the battery is... allow the LED to protect the circuitry. lead. Operation: Chapter 3 PROTECT/CLIP INDICATORS Clip lights for each channel. Even if the problem occurs for only a few microseconds, a pulse-stretching circuit will lead to amplifier overheating and eventual thermal shutdown to light long enough for...
...Lower green LEDs indicate signal in the opposite direction, reverse the wires going to the RA150/300/500. STEREO/BRIDGED MONO SWITCH Underneath the right input jack, this doesn't solve the problem, check your speakers' polarity as shown on for stereo, you when the battery is... allow the LED to protect the circuitry. lead. Operation: Chapter 3 PROTECT/CLIP INDICATORS Clip lights for each channel. Even if the problem occurs for only a few microseconds, a pulse-stretching circuit will lead to amplifier overheating and eventual thermal shutdown to light long enough for...
User Manual
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... so that ground is "dirty" and contains noise, it sacrifices the safety factor the AC ground wire provides. Most ground loop problems can flow through the shielded cable and AC ground of current can be solved by plugging all equipment into the same grounded AC ...would be to use a balancing transformer or direct box as a ground loop. RA150/300/500 Reference Manual Furthermore, many components in the audio line between the input and output connections. Ground loops cause the most problems with high-gain circuits, since massive amplification of even a couple millivolts of gear...
... so that ground is "dirty" and contains noise, it sacrifices the safety factor the AC ground wire provides. Most ground loop problems can flow through the shielded cable and AC ground of current can be solved by plugging all equipment into the same grounded AC ...would be to use a balancing transformer or direct box as a ground loop. RA150/300/500 Reference Manual Furthermore, many components in the audio line between the input and output connections. Ground loops cause the most problems with high-gain circuits, since massive amplification of even a couple millivolts of gear...
User Manual
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... channels will glow. OUTPUT RELAYS/THERMAL CYCLING Reference Series amplifiers have high-current output protection relays which will turn off the power and check for problems with the wiring, input level, or ventilation of the device feeding the amplifier until it reaches the amplifier gain control, either case, no amount of... may also trigger an internal thermal fuse, which disconnect the output in difficult environmental conditions. Additional protection circuitry keeps RFI out of cooler air. 26 RA150/300/500 Reference Manual
... channels will glow. OUTPUT RELAYS/THERMAL CYCLING Reference Series amplifiers have high-current output protection relays which will turn off the power and check for problems with the wiring, input level, or ventilation of the device feeding the amplifier until it reaches the amplifier gain control, either case, no amount of... may also trigger an internal thermal fuse, which disconnect the output in difficult environmental conditions. Additional protection circuitry keeps RFI out of cooler air. 26 RA150/300/500 Reference Manual
User Manual
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...a known line-level source to the amplifier inputs to locate possible causes and solutions before contacting Alesis Product Support for Alesis Reference Series amplifiers. If you experience problems while operating your RA150/300/500, please use balanced inputs or plug amp and source into the same AC circuit... RA150/300/500 Reference Manual 27 Set the switch on the back panel to the "120 V" position ...
...a known line-level source to the amplifier inputs to locate possible causes and solutions before contacting Alesis Product Support for Alesis Reference Series amplifiers. If you experience problems while operating your RA150/300/500, please use balanced inputs or plug amp and source into the same AC circuit... RA150/300/500 Reference Manual 27 Set the switch on the back panel to the "120 V" position ...
User Manual
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...of troublefree use cloth to clean the unit. Service on this product should be made using current technology, and should problems occur, DO NOT attempt to clean the RA150/300/500's metal and plastic surfaces. For heavy dirt, use a non-abrasive household cleaner such as required CARE ...AND MAINTENANCE CLEANING Disconnect the AC cord, then use a damp cloth to service the unit yourself. Check speaker connections. REFER ALL SERVICING TO ALESIS We believe...
...of troublefree use cloth to clean the unit. Service on this product should be made using current technology, and should problems occur, DO NOT attempt to clean the RA150/300/500's metal and plastic surfaces. For heavy dirt, use a non-abrasive household cleaner such as required CARE ...AND MAINTENANCE CLEANING Disconnect the AC cord, then use a damp cloth to service the unit yourself. Check speaker connections. REFER ALL SERVICING TO ALESIS We believe...
User Manual
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... THE USA AND CANADA: Contact your connections, and make sure you've read the manual. Do not return products to : Support@alesis.com RA150/300/500 Reference Manual 29 Units without CFCs, please) or "bubble-pack" surrounding the unit. Next day service is available on our... the USA and Canada: If the problem persists, contact Alesis USA at www.alesis.com & find the Product Support web page. OBTAINING REPAIR SERVICE Before contacting Alesis, check over all your local Alesis distributor for standard one of our technicians; The Alesis Limited Warranty applies only to products sold...
... THE USA AND CANADA: Contact your connections, and make sure you've read the manual. Do not return products to : Support@alesis.com RA150/300/500 Reference Manual 29 Units without CFCs, please) or "bubble-pack" surrounding the unit. Next day service is available on our... the USA and Canada: If the problem persists, contact Alesis USA at www.alesis.com & find the Product Support web page. OBTAINING REPAIR SERVICE Before contacting Alesis, check over all your local Alesis distributor for standard one of our technicians; The Alesis Limited Warranty applies only to products sold...
User Manual
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... PERMITTED BY LAW, DAMAGES FOR PERSONAL INJURY. This warranty only applies to products sold to purchasers in the United States of the problem. All inquiries must be presented in the form of a bill of sale. Some states do not allow limitations on inspection by ...PURPOSE OR MERCHANTABILITY OR OTHER IMPLIED WARRANTIES. ALESIS Los Angeles, California USA www.alesis.com PLEASE REGISTER YOUR PRODUCT ONLINE: WWW.ALESIS.COM Alesis, Los Angeles, CA USA © 2000 Alesis Specifications Subject To Change Without Notice 7-51-0097 11/00 RA150/300/500 Reference Manual 35 This warranty is...
... PERMITTED BY LAW, DAMAGES FOR PERSONAL INJURY. This warranty only applies to products sold to purchasers in the United States of the problem. All inquiries must be presented in the form of a bill of sale. Some states do not allow limitations on inspection by ...PURPOSE OR MERCHANTABILITY OR OTHER IMPLIED WARRANTIES. ALESIS Los Angeles, California USA www.alesis.com PLEASE REGISTER YOUR PRODUCT ONLINE: WWW.ALESIS.COM Alesis, Los Angeles, CA USA © 2000 Alesis Specifications Subject To Change Without Notice 7-51-0097 11/00 RA150/300/500 Reference Manual 35 This warranty is...