User Manual
Page 3
.../500 7 Principal Features 7 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 ... and RA500 only 22 Back Panel Controls 22 AC Voltage Switch 22 Stereo/Bridged Mono Switch 22 Checking For Proper Polarity 22 Using the RA150 as a Headphone Amplifier.......23 ... Refer All Servicing to Alesis 28 Obtaining Repair Service 29 Customers outside the USA and Canada 29 SPECIFICATIONS 30 INDEX 34 ALESIS LIMITED WARRANTY 35 RA150/300/...
.../500 7 Principal Features 7 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 ... and RA500 only 22 Back Panel Controls 22 AC Voltage Switch 22 Stereo/Bridged Mono Switch 22 Checking For Proper Polarity 22 Using the RA150 as a Headphone Amplifier.......23 ... Refer All Servicing to Alesis 28 Obtaining Repair Service 29 Customers outside the USA and Canada 29 SPECIFICATIONS 30 INDEX 34 ALESIS LIMITED WARRANTY 35 RA150/300/...
User Manual
Page 9
... and should be treated with an external voltage selection switch. Even if you are designed for purchasing an Alesis Reference Series power amplifier, one of the RA150/300/500. The design of the Reference Series utilize a direct coupled, fully complementary circuit topology.... RA150, RA300, and RA500 provide extremely accurate sonic quality as well as measured specifications, but their conservative design and careful attention to electronic protection means they will continue to make the best use convection cooling with 2 ohm dynamic stability (stereo mode only). All models feature ...
... and should be treated with an external voltage selection switch. Even if you are designed for purchasing an Alesis Reference Series power amplifier, one of the RA150/300/500. The design of the Reference Series utilize a direct coupled, fully complementary circuit topology.... RA150, RA300, and RA500 provide extremely accurate sonic quality as well as measured specifications, but their conservative design and careful attention to electronic protection means they will continue to make the best use convection cooling with 2 ohm dynamic stability (stereo mode only). All models feature ...
User Manual
Page 20
... (red = "hot" output, black = ground). Any resistance between the speaker wire and amplifier. Because they will lead to a speaker. The lower the resistance, the better. Alesis amplifiers can reliably drive 4 Ω loads in Stereo mode and 8 Ω loads in Bridged Mono mode. Some loudspeakers carry both nominal and ... is greater surface area contact than solid, cables for permanent installations. Connections: Chapter 2 OUTPUTS Warning: Be sure that produces 1 dB of power loss wire gauge 6 8 10 12 14 16 18 20 22 feet 1200 800 475 300 190 120 75 50 30 at 4Ω ...
... (red = "hot" output, black = ground). Any resistance between the speaker wire and amplifier. Because they will lead to a speaker. The lower the resistance, the better. Alesis amplifiers can reliably drive 4 Ω loads in Stereo mode and 8 Ω loads in Bridged Mono mode. Some loudspeakers carry both nominal and ... is greater surface area contact than solid, cables for permanent installations. Connections: Chapter 2 OUTPUTS Warning: Be sure that produces 1 dB of power loss wire gauge 6 8 10 12 14 16 18 20 22 feet 1200 800 475 300 190 120 75 50 30 at 4Ω ...
User Manual
Page 22
... to the other. The single input is reversed with twice the power. This will ensure that polarity reversal can cause phase-related problems such as a mono amplifier with respect to reversed polarity. To connect a speaker in stereo mode, because most cases you use bridged mode? Don't plug ...however, because not all the way down. OUTPUT CONNECTIONS FOR BRIDGED OPERATION Instead of using the RA150/300/500 as a stereo 2channel amplifier, it as thin bass, poor stereo imaging and frequency response anomalies. You may use it is reversed, the cone will be 4 ohms, too low for...
... to the other. The single input is reversed with twice the power. This will ensure that polarity reversal can cause phase-related problems such as a mono amplifier with respect to reversed polarity. To connect a speaker in stereo mode, because most cases you use bridged mode? Don't plug ...however, because not all the way down. OUTPUT CONNECTIONS FOR BRIDGED OPERATION Instead of using the RA150/300/500 as a stereo 2channel amplifier, it as thin bass, poor stereo imaging and frequency response anomalies. You may use it is reversed, the cone will be 4 ohms, too low for...
User Manual
Page 24
... accidentally switched to see that allows voltage conversion from its normal operation as a two-channel amplifier to enter and exit clipping with approximately twice the power. CHECKING FOR PROPER POLARITY To check for stereo, you may not hear any extended period of this switch only if it . lead. ...clipping. Even if the problem occurs for proper polarity. METERS (RA300 AND RA500 ONLY) In the center of the front panel are not mislabelled), the speaker cone will stop automatically when the amplifier cools down the volume controls to reduce the signal level going to 230 volt...
... accidentally switched to see that allows voltage conversion from its normal operation as a two-channel amplifier to enter and exit clipping with approximately twice the power. CHECKING FOR PROPER POLARITY To check for stereo, you may not hear any extended period of this switch only if it . lead. ...clipping. Even if the problem occurs for proper polarity. METERS (RA300 AND RA500 ONLY) In the center of the front panel are not mislabelled), the speaker cone will stop automatically when the amplifier cools down the volume controls to reduce the signal level going to 230 volt...
User Manual
Page 29
...break. Set levels to "Bridge Mono" mode when wired for Alesis Reference Series amplifiers. Set the switch on the back panel to the "120 V" position Set the switch on ) Power is not connected Line voltage set improperly Amplifier accidentally set to "12:00" or above Normal operation will ... front panel gain controls, there are no special considerations are required for stereo Input cables are crossing a power cable or near a transformer Bad cables Problem with the source Noise induced from outputs Low output power Bass disappears, speakers sound out of unbalanced Replace the cable with a ...
...break. Set levels to "Bridge Mono" mode when wired for Alesis Reference Series amplifiers. Set the switch on the back panel to the "120 V" position Set the switch on ) Power is not connected Line voltage set improperly Amplifier accidentally set to "12:00" or above Normal operation will ... front panel gain controls, there are no special considerations are required for stereo Input cables are crossing a power cable or near a transformer Bad cables Problem with the source Noise induced from outputs Low output power Bass disappears, speakers sound out of unbalanced Replace the cable with a ...
User Manual
Page 35
...an Alesis RA150/300/500 Reference Series power amplifier. 33 A power switch shall be provided on the front panel with an on the back panel. The amplifier shall be 3-conductor 1/4" TRS jacks mounted on /off transitions. Cooling shall be convection-type only, with 2 ohm dynamic stability (stereo mode...per channel (RA150), 150 watts per channel (RA300) or 250 watts per channel (RA500) into an 8-ohm load when operated in -rush limiters. Architect's and Engineer's Specifications The power amplifier shall be a two-channel unit capable of electromagnetic interference. The inputs shall be ...
...an Alesis RA150/300/500 Reference Series power amplifier. 33 A power switch shall be provided on the front panel with an on the back panel. The amplifier shall be 3-conductor 1/4" TRS jacks mounted on /off transitions. Cooling shall be convection-type only, with 2 ohm dynamic stability (stereo mode...per channel (RA150), 150 watts per channel (RA300) or 250 watts per channel (RA500) into an 8-ohm load when operated in -rush limiters. Architect's and Engineer's Specifications The power amplifier shall be a two-channel unit capable of electromagnetic interference. The inputs shall be ...