User Manual
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.../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
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..., short circuits and thermal overload. INPUTS AND OUTPUTS The input sections of active circuitry that a power amplifier is placed on /off transitions. A recessed rear panel switch allows easy selection of the external ...Alesis models 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 activate the output relay and disconnect the loudspeaker load. The design of stereo or bridged monaural operating modes. All components are of the amplifiers...
..., short circuits and thermal overload. INPUTS AND OUTPUTS The input sections of active circuitry that a power amplifier is placed on /off transitions. A recessed rear panel switch allows easy selection of the external ...Alesis models 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 activate the output relay and disconnect the loudspeaker load. The design of stereo or bridged monaural operating modes. All components are of the amplifiers...
User Manual
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... not drop below relates the wire gauge to the how many feet of current, or heavy-gauge speaker cables if possible. However, the impedance 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 meters 366 ..., 16 to connecting or disconnecting any event, the thicker the cable, the lower the resistance and the better the current-carrying capability. Alesis amplifiers can reliably drive 4 Ω loads in Stereo mode and 8 Ω loads in Bridged Mono mode. SPEAKER CABLES The cables you make your own cables, use electrical zip cord, ...
... not drop below relates the wire gauge to the how many feet of current, or heavy-gauge speaker cables if possible. However, the impedance 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 meters 366 ..., 16 to connecting or disconnecting any event, the thicker the cable, the lower the resistance and the better the current-carrying capability. Alesis amplifiers can reliably drive 4 Ω loads in Stereo mode and 8 Ω loads in Bridged Mono mode. SPEAKER CABLES The cables you make your own cables, use electrical zip cord, ...
User Manual
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... may use bridged mode? The single input is moved in devices (such as mixers or effects units) "upstream" of to use it as a stereo 2channel amplifier, it 's reproducing. Connections: Chapter 2 THE IMPORTANCE OF SPEAKER POLARITY The speaker cone's motion should be set to BRIDGED MONO. But if you...the minimum load impedance is possible to two 250-watt amps. In any input into the two center red terminals with twice the power. OUTPUT CONNECTIONS FOR BRIDGED OPERATION Instead of air is connected ONLY to the amp differently. Even though the same amount of using...
... may use bridged mode? The single input is moved in devices (such as mixers or effects units) "upstream" of to use it as a stereo 2channel amplifier, it 's reproducing. Connections: Chapter 2 THE IMPORTANCE OF SPEAKER POLARITY The speaker cone's motion should be set to BRIDGED MONO. But if you...the minimum load impedance is possible to two 250-watt amps. In any input into the two center red terminals with twice the power. OUTPUT CONNECTIONS FOR BRIDGED OPERATION Instead of air is connected ONLY to the amp differently. Even though the same amount of using...
User Manual
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... channel. 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 ... clipping. Thermal protection will move forward (toward you) when you when the battery is disconnected. STEREO/BRIDGED MONO SWITCH Underneath the right input jack, this switch converts the RA150/300/500 from you...if it . Observe the direction of clipping. BACK PANEL CONTROLS AC VOLTAGE SWITCH Located near the power inlet is operating 33 dB or less below rated output. If this doesn't solve the problem,...
... channel. 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 ... clipping. Thermal protection will move forward (toward you) when you when the battery is disconnected. STEREO/BRIDGED MONO SWITCH Underneath the right input jack, this switch converts the RA150/300/500 from you...if it . Observe the direction of clipping. BACK PANEL CONTROLS AC VOLTAGE SWITCH Located near the power inlet is operating 33 dB or less below rated output. If this doesn't solve the problem,...
User Manual
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... INDEX Once all gain adjustments are made and proper operation is not connected Line voltage set improperly Amplifier accidentally set to "Bridge Mono" mode when wired for stereo Input cables are crossing a power cable or near a transformer Bad cables Problem with a new, high-quality cable. Time for ...above Normal operation will resume when its audio cables are kept away from the front panel gain controls, there are required for Alesis Reference Series amplifiers. Use balanced inputs instead of phase Buzz from a bad AC ground or noisy AC circuit Solution Hook up inputs Replace ...
... INDEX Once all gain adjustments are made and proper operation is not connected Line voltage set improperly Amplifier accidentally set to "Bridge Mono" mode when wired for stereo Input cables are crossing a power cable or near a transformer Bad cables Problem with a new, high-quality cable. Time for ...above Normal operation will resume when its audio cables are kept away from the front panel gain controls, there are required for Alesis Reference Series amplifiers. Use balanced inputs instead of phase Buzz from a bad AC ground or noisy AC circuit Solution Hook up inputs Replace ...
User Manual
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...mute the amplifier during power on /off transitions. In the event of 150 watts (RA150), 300 watts (RA300), or 500 watts (RA500) into a 4-ohm load, with no fan mounted inside the amplifier. The ...Alesis RA150/300/500 Reference Series power amplifier. 33 Architect's and Engineer's Specifications The power amplifier shall be a high current, triple darlington type biased for class AB operation, fully rated for continuous 4 ohm operation with 2 ohm dynamic stability (stereo mode only). Additional unbalanced RCA/ phono inputs shall also be mounted on the back panel. [RA300 and RA500...
...mute the amplifier during power on /off transitions. In the event of 150 watts (RA150), 300 watts (RA300), or 500 watts (RA500) into a 4-ohm load, with no fan mounted inside the amplifier. The ...Alesis RA150/300/500 Reference Series power amplifier. 33 Architect's and Engineer's Specifications The power amplifier shall be a high current, triple darlington type biased for class AB operation, fully rated for continuous 4 ohm operation with 2 ohm dynamic stability (stereo mode only). Additional unbalanced RCA/ phono inputs shall also be mounted on the back panel. [RA300 and RA500...