User Manual
Page 12
... result that in the first place. 10 ELECTRICAL SERVICE TO THE RA150/300/500 One of the most circumstances, normal household or commercial power outlets will be adequate. (A standard 15-amp circuit is overstressed. Connections: Chapter 2 120 VOLT/230 VOLT OPERATION The Alesis Reference Series amplifiers feature dualvoltage operation. Units sold in . Before replacing... capacity, the amplifier may momentarily be much less. All fuses are situated in the United States) should plan for the country you're using the amp in areas with 120V power (as RA150/300/500 Reference Manual
... result that in the first place. 10 ELECTRICAL SERVICE TO THE RA150/300/500 One of the most circumstances, normal household or commercial power outlets will be adequate. (A standard 15-amp circuit is overstressed. Connections: Chapter 2 120 VOLT/230 VOLT OPERATION The Alesis Reference Series amplifiers feature dualvoltage operation. Units sold in . Before replacing... capacity, the amplifier may momentarily be much less. All fuses are situated in the United States) should plan for the country you're using the amp in areas with 120V power (as RA150/300/500 Reference Manual
User Manual
Page 13
...as eliminate the need for it 's in a vocal booth, etc. If necessary, use . • Alesis Reference amplifiers are well shielded; Do not seal any enclosure that the RA150/300/500 will shut itself off for the RA500), placed on a shelf, tucked away in use. ...RA150/300/500's weight (from power amplifiers is the major enemy of electromagnetic interference into the low level units, which may wish to leave an empty rack space above or below the amp to avoid coupling AC-borne interference into the audio. 11 When you install it in smaller studios; RA150/300/500 Reference Manual...
...as eliminate the need for it 's in a vocal booth, etc. If necessary, use . • Alesis Reference amplifiers are well shielded; Do not seal any enclosure that the RA150/300/500 will shut itself off for the RA500), placed on a shelf, tucked away in use. ...RA150/300/500's weight (from power amplifiers is the major enemy of electromagnetic interference into the low level units, which may wish to leave an empty rack space above or below the amp to avoid coupling AC-borne interference into the audio. 11 When you install it in smaller studios; RA150/300/500 Reference Manual...
User Manual
Page 14
... cleaning agent. AVOIDING ELECTROMAGNETIC INTERFERENCE Because the RA150/300/500 contains a large power transformer, we recommend that no matter where or how the amp is recommended as the magnetic fields may enter the pickups, causing hum. 12 RA150/300/500 Reference Manual To properly mount the stick-on feet: 1... OR IN A NON-RACK ENCLOSURE To mount the amplifier on a shelf or other flat surface, Alesis recommends using the enclosed stick-on feet to avoid scratching the shelf's surface with magnetic pickups near the RA150/300/500. This step insures that you plan to stick the feet.
... cleaning agent. AVOIDING ELECTROMAGNETIC INTERFERENCE Because the RA150/300/500 contains a large power transformer, we recommend that no matter where or how the amp is recommended as the magnetic fields may enter the pickups, causing hum. 12 RA150/300/500 Reference Manual To properly mount the stick-on feet: 1... OR IN A NON-RACK ENCLOSURE To mount the amplifier on a shelf or other flat surface, Alesis recommends using the enclosed stick-on feet to avoid scratching the shelf's surface with magnetic pickups near the RA150/300/500. This step insures that you plan to stick the feet.
User Manual
Page 20
...Thin hookup wire is the common "zip cord" used to connect AC to a 1 dB power loss at 8Ω meters 740 488 290 183 114 73 46 30 18 18 RA150/300/500 Reference Manual The lower the resistance, the better. There is greater surface area contact than solid, cables ... speaker cables. Never use electrical zip cord, which is more difficult to handle several amps of cable will degrade the damping factor, efficiency and ultimately, the sound quality. WHAT'S THE LOAD IMPEDANCE? Alesis recommends stranded, rather than with frequency, and its nominal rated impedance is removed. Cable...
...Thin hookup wire is the common "zip cord" used to connect AC to a 1 dB power loss at 8Ω meters 740 488 290 183 114 73 46 30 18 18 RA150/300/500 Reference Manual The lower the resistance, the better. There is greater surface area contact than solid, cables ... speaker cables. Never use electrical zip cord, which is more difficult to handle several amps of cable will degrade the damping factor, efficiency and ultimately, the sound quality. WHAT'S THE LOAD IMPEDANCE? Alesis recommends stranded, rather than with frequency, and its nominal rated impedance is removed. Cable...
User Manual
Page 22
... be set to BRIDGED MONO. OUTPUT CONNECTIONS FOR BRIDGED OPERATION Instead of to two 250-watt amps. To connect a speaker in bridged mono mode: Following the instructions on the previous page for... you use a dual banana plug in this wiring convention. Should you need. 20 RA150/300/500 Reference Manual For example, a kick drum pushes air toward you on connection, connect the "+" ...2channel amplifier, it 's reproducing. In any input into the two center red terminals with twice the power. An additional problem occurs if the polarity of the amplifier in a push-pull configuration, so ...
... be set to BRIDGED MONO. OUTPUT CONNECTIONS FOR BRIDGED OPERATION Instead of to two 250-watt amps. To connect a speaker in bridged mono mode: Following the instructions on the previous page for... you use a dual banana plug in this wiring convention. Should you need. 20 RA150/300/500 Reference Manual For example, a kick drum pushes air toward you on connection, connect the "+" ...2channel amplifier, it 's reproducing. In any input into the two center red terminals with twice the power. An additional problem occurs if the polarity of the amplifier in a push-pull configuration, so ...
User Manual
Page 27
... generally best to try to keep the noise level at nominal levels, increase the test tone until the desired peak sound pressure level is first powered up , but if it amplifies the noise floor of the mixer output stage or wiring unnecessarily. The mixer's meter should read from +10 to ...itself. RA150/300/500 Reference Manual 25 If a low frequency signal in studio use a test tone or pink noise with distortion, and to then set levels is to use , is that the amplifier's gain controls are set to an appropriate level for the system gain structure. The most mixers, the amp will keep...
... generally best to try to keep the noise level at nominal levels, increase the test tone until the desired peak sound pressure level is first powered up , but if it amplifies the noise floor of the mixer output stage or wiring unnecessarily. The mixer's meter should read from +10 to ...itself. RA150/300/500 Reference Manual 25 If a low frequency signal in studio use a test tone or pink noise with distortion, and to then set levels is to use , is that the amplifier's gain controls are set to an appropriate level for the system gain structure. The most mixers, the amp will keep...
User Manual
Page 29
... possible causes and solutions before contacting Alesis Product Support for a coffee break. 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 Symptom No audio from outputs Low output power Bass disappears, speakers sound out of...
... possible causes and solutions before contacting Alesis Product Support for a coffee break. 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 Symptom No audio from outputs Low output power Bass disappears, speakers sound out of...