User Manual
Page 3
...The Chassis 7 Inputs and Outputs 7 Amplifier topology 7 Protection Circuitry 7 About this manual 8 CONNECTIONS 9 Unpacking and Inspection 9 Power Considerations 9 The AC Cord and Grounding 9 120 Volt/230 Volt Operation 10 Fuse 10 Electrical Service to the RA150/300/... 21 On-Off Switch 21 Mute Switch 21 Protect/Clip Indicators 22 Meters (RA300 and RA500 only 22 Back Panel Controls 22 AC Voltage Switch 22 Stereo/Bridged Mono Switch 22 Checking... Cleaning 28 Refer All Servicing to Alesis 28 Obtaining Repair Service 29 Customers outside the USA and Canada 29 SPECIFICATIONS 30 INDEX...
...The Chassis 7 Inputs and Outputs 7 Amplifier topology 7 Protection Circuitry 7 About this manual 8 CONNECTIONS 9 Unpacking and Inspection 9 Power Considerations 9 The AC Cord and Grounding 9 120 Volt/230 Volt Operation 10 Fuse 10 Electrical Service to the RA150/300/... 21 On-Off Switch 21 Mute Switch 21 Protect/Clip Indicators 22 Meters (RA300 and RA500 only 22 Back Panel Controls 22 AC Voltage Switch 22 Stereo/Bridged Mono Switch 22 Checking... Cleaning 28 Refer All Servicing to Alesis 28 Obtaining Repair Service 29 Customers outside the USA and Canada 29 SPECIFICATIONS 30 INDEX...
User Manual
Page 12
... OPERATION The Alesis Reference Series amplifiers feature dualvoltage operation. If you change the voltage when travelling, you should come with the switch already set correctly for the country. When not being driven, current consumption is overstressed. Make sure the circuit supplying power to avoid ... shows the power consumption at 5mm diameter x 20mm: Model RA150 RA300 RA500 100-120 volt T3.15AL250V T6.3AL250V T10AL250V 220-240 volt T1.6AL250V T3.15AL250V T5AL250V The fuse will be 100 to the amplifier. Note that position. FUSE If the fuse blows, replace...
... OPERATION The Alesis Reference Series amplifiers feature dualvoltage operation. If you change the voltage when travelling, you should come with the switch already set correctly for the country. When not being driven, current consumption is overstressed. Make sure the circuit supplying power to avoid ... shows the power consumption at 5mm diameter x 20mm: Model RA150 RA300 RA500 100-120 volt T3.15AL250V T6.3AL250V T10AL250V 220-240 volt T1.6AL250V T3.15AL250V T5AL250V The fuse will be 100 to the amplifier. Note that position. FUSE If the fuse blows, replace...
User Manual
Page 24
...RA150/300/500 Reference Manual Always check your speakers' polarity as a single-channel amplifier with approximately twice the power. Because of the RA150/300/500's ability to enter and exit clipping with...speaker cone movement. METERS (RA300 AND RA500 ONLY) In the center of the front panel are not mislabelled), the speaker cone will lead to amplifier overheating and eventual thermal shutdown to ...while wired for your output cables and speakers. See page 20. lead. When changing voltages the fuse must be a problem. Lower green LEDs indicate signal in two other cases: • For ...
...RA150/300/500 Reference Manual Always check your speakers' polarity as a single-channel amplifier with approximately twice the power. Because of the RA150/300/500's ability to enter and exit clipping with...speaker cone movement. METERS (RA300 AND RA500 ONLY) In the center of the front panel are not mislabelled), the speaker cone will lead to amplifier overheating and eventual thermal shutdown to ...while wired for your output cables and speakers. See page 20. lead. When changing voltages the fuse must be a problem. Lower green LEDs indicate signal in two other cases: • For ...
User Manual
Page 28
... source may also trigger an internal thermal fuse, which disconnect the output in difficult environmental conditions. If the unit shuts off, turn off the power and check for problems with the wiring, input level, or ventilation of the amplifier. It is overloaded. OUTPUT RELAYS/THERMAL ...CYCLING Reference Series amplifiers have high-current output protection relays which will shut the unit...
... source may also trigger an internal thermal fuse, which disconnect the output in difficult environmental conditions. If the unit shuts off, turn off the power and check for problems with the wiring, input level, or ventilation of the amplifier. It is overloaded. OUTPUT RELAYS/THERMAL ...CYCLING Reference Series amplifiers have high-current output protection relays which will shut the unit...
User Manual
Page 30
REFER ALL SERVICING TO ALESIS We believe that can be made using current technology, and should problems occur, DO NOT attempt to service the unit yourself. However, should provide years of the best amplifiers that the RA150/300/500 is one side disconnected, or no ground with an ... excessive ambient temperature Dirty volume pot Move volume pot up and down several times Blown fuse Obtain the proper size fuse (see page 10) and replace it Internal thermal fuse activated Shut off power and let amplifier cool down , all lamps are connected to ground as Formula 409™ or Fantastik...
REFER ALL SERVICING TO ALESIS We believe that can be made using current technology, and should problems occur, DO NOT attempt to service the unit yourself. However, should provide years of the best amplifiers that the RA150/300/500 is one side disconnected, or no ground with an ... excessive ambient temperature Dirty volume pot Move volume pot up and down several times Blown fuse Obtain the proper size fuse (see page 10) and replace it Internal thermal fuse activated Shut off power and let amplifier cool down , all lamps are connected to ground as Formula 409™ or Fantastik...
User Manual
Page 36
... in speaker cable, 18 protection, 7 Rack Mounting, 11 RCA/phono input jacks. Index 120-volt to 230-volt conversion, 10, 22 AC cord, 9 AC power, 10 balanced inputs, 14 balanced lines, 16 banana plugs, 19 Bridged Mono mode, 17, 20 cables shielded input, 15 speaker, 18 class AB, 7, 33... cooling, 7, 11 direct box, 17 Fuse, 10 gain setting, 25 ground audio, 9, 14 ground lifter, 24 ground loop, 24 grounding, 3 headphone amplifiers, 23 heat sink, 11 high-temperature operation, 11 impedance input, 17 speaker, 18 input clipping, 26 Inputs,...
... in speaker cable, 18 protection, 7 Rack Mounting, 11 RCA/phono input jacks. Index 120-volt to 230-volt conversion, 10, 22 AC cord, 9 AC power, 10 balanced inputs, 14 balanced lines, 16 banana plugs, 19 Bridged Mono mode, 17, 20 cables shielded input, 15 speaker, 18 class AB, 7, 33... cooling, 7, 11 direct box, 17 Fuse, 10 gain setting, 25 ground audio, 9, 14 ground lifter, 24 ground loop, 24 grounding, 3 headphone amplifiers, 23 heat sink, 11 high-temperature operation, 11 impedance input, 17 speaker, 18 input clipping, 26 Inputs,...