User Manual
Page 3
... of Conformity 6 ABOUT THE 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 ... Controls 22 AC Voltage Switch 22 Stereo/Bridged Mono Switch 22 Checking For Proper Polarity 22 Using the RA150 as a Headphone Amplifier.......23 Choosing the Correct Speakers 23 ... 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 Reference ...
... of Conformity 6 ABOUT THE 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 ... Controls 22 AC Voltage Switch 22 Stereo/Bridged Mono Switch 22 Checking For Proper Polarity 22 Using the RA150 as a Headphone Amplifier.......23 Choosing the Correct Speakers 23 ... 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 Reference ...
User Manual
Page 9
...CIRCUITRY Protection for the amplifier consists of the RA150/300/500. All units feature rack mount faceplates. INPUTS AND OUTPUTS The input sections of the amplifiers utilize precision electronically-balanced input circuitry for purchasing an Alesis Reference Series power amplifier, one of high ...quality and mechanical construction and are used . AC power entry is placed on rugged, heavy gauge steel chassis. In the event of stereo or ...
...CIRCUITRY Protection for the amplifier consists of the RA150/300/500. All units feature rack mount faceplates. INPUTS AND OUTPUTS The input sections of the amplifiers utilize precision electronically-balanced input circuitry for purchasing an Alesis Reference Series power amplifier, one of high ...quality and mechanical construction and are used . AC power entry is placed on rugged, heavy gauge steel chassis. In the event of stereo or ...
User Manual
Page 20
..."zip cord" used to connect AC to provide full output power and their protection circuits may be degraded. Alesis amplifiers can reliably drive 4 Ω loads in Stereo mode and 8 Ω loads in Bridged Mono mode. The RA150/300/500 amplifiers will not be damaged by excessively low output load impedances, but...signal wiring. The table below the amplifier's rated output load. Cable length that the actual load impedance does not drop below relates the wire gauge to a 1 dB power loss at 8Ω meters 740 488 290 183 114 73 46 30 18 18 RA150/300/500 Reference Manual Connections: ...
..."zip cord" used to connect AC to provide full output power and their protection circuits may be degraded. Alesis amplifiers can reliably drive 4 Ω loads in Stereo mode and 8 Ω loads in Bridged Mono mode. The RA150/300/500 amplifiers will not be damaged by excessively low output load impedances, but...signal wiring. The table below the amplifier's rated output load. Cable length that the actual load impedance does not drop below relates the wire gauge to a 1 dB power loss at 8Ω meters 740 488 290 183 114 73 46 30 18 18 RA150/300/500 Reference Manual Connections: ...
User Manual
Page 22
..., remove the protective caps from the top of correctly hooking up the output cables. Even though the same amount of using the RA150/300/500 as a stereo 2channel amplifier, it is a function of the binding posts for bridged mode. Plug the banana connector into the Channel 2/Right input jack,... follow this situation. With the RA150/300/500, polarity is possible to the red binding post for the Channel 1/Left and the "-" wire to use it 's reproducing. To connect a speaker in either case, many listeners report superior sound with twice the power. If the polarity is moved ...
..., remove the protective caps from the top of correctly hooking up the output cables. Even though the same amount of using the RA150/300/500 as a stereo 2channel amplifier, it is a function of the binding posts for bridged mode. Plug the banana connector into the Channel 2/Right input jack,... follow this situation. With the RA150/300/500, polarity is possible to the red binding post for the Channel 1/Left and the "-" wire to use it 's reproducing. To connect a speaker in either case, many listeners report superior sound with twice the power. If the polarity is moved ...
User Manual
Page 24
...than -6 dB, but before clipping. The two green LEDs closest to 230 volt operation. BACK PANEL CONTROLS AC VOLTAGE SWITCH Located near the power inlet is disconnected. When changing voltages the fuse must be a problem. lead. However, if the LEDs flash often or remain on page ... voltage conversion from the loudspeaker as you will lead to amplifier overheating and eventual thermal shutdown to the speaker cable's "cold," ground, or - STEREO/BRIDGED MONO SWITCH Underneath the right input jack, this switch converts the RA150/300/500 from its normal operation as shown on for ...
...than -6 dB, but before clipping. The two green LEDs closest to 230 volt operation. BACK PANEL CONTROLS AC VOLTAGE SWITCH Located near the power inlet is disconnected. When changing voltages the fuse must be a problem. lead. However, if the LEDs flash often or remain on page ... voltage conversion from the loudspeaker as you will lead to amplifier overheating and eventual thermal shutdown to the speaker cable's "cold," ground, or - STEREO/BRIDGED MONO SWITCH Underneath the right input jack, this switch converts the RA150/300/500 from its normal operation as shown on for ...
User Manual
Page 29
...back panel to the "stereo" position Make sure that the RA150/300/500 and its internal temperature has dropped to "12:00" or above Normal operation will resume when its audio cables are kept away from outputs Cause No input audio Bad cables Amplifier is confirmed, no ... levels to reliable levels. Use balanced inputs instead of phase Buzz from power cables, other power transformers and wall warts. use the following table to "Bridge Mono" mode when wired for Alesis Reference Series amplifiers. If so, the amplifier may be in the rack high? Time for assistance. Try plugging a...
...back panel to the "stereo" position Make sure that the RA150/300/500 and its internal temperature has dropped to "12:00" or above Normal operation will resume when its audio cables are kept away from outputs Cause No input audio Bad cables Amplifier is confirmed, no ... levels to reliable levels. Use balanced inputs instead of phase Buzz from power cables, other power transformers and wall warts. use the following table to "Bridge Mono" mode when wired for Alesis Reference Series amplifiers. If so, the amplifier may be in the rack high? Time for assistance. Try plugging a...
User Manual
Page 35
... a 4-ohm load, with 2 ohm dynamic stability (stereo mode only). This circuitry will activate the output relay and disconnect the loudspeaker load. Output connectors shall be capable of accepting heavy gauge wire or banana-type connectors. A power switch shall be an Alesis RA150/300/500 Reference Series power amplifier. 33 The amplifier shall be provided on /off indicator...
... a 4-ohm load, with 2 ohm dynamic stability (stereo mode only). This circuitry will activate the output relay and disconnect the loudspeaker load. Output connectors shall be capable of accepting heavy gauge wire or banana-type connectors. A power switch shall be an Alesis RA150/300/500 Reference Series power amplifier. 33 The amplifier shall be provided on /off indicator...