Alto PS 4 LA EVO User Manual (English)

Questions and Answers:

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calebbrownAug 16, 2025
Why do Alto PS 4 LA EVO feed back and howl when the microphone volume is turned up?
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  mannchristopherAug 16, 2025
  Feedback and howling occur in Alto Speakers when the microphone volume is turned up due to a few reasons: * Microphones are pointed into the speakers. Move the speakers so they do not point at the microphone's pickup pattern. * Equalizer settings are incorrect. Locate the feedback frequency and reduce it using the mixer EQ or an external equalizer. * Excessive gain. Reduce the gain at the mixer and move the microphone closer to the sound source.
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Ray MartinezAug 19, 2025
What to do if Alto PS 4 LA EVO Speakers signal sounds distorted and very loud, and the LIMIT light is lit?
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  Erika MoralesAug 19, 2025
  If the signal from your Alto Speakers sounds distorted and very loud, and the LIMIT light is frequently on, it's likely due to an excessive input signal trying to exceed the speaker's capabilities. To resolve this, reduce the output level of the source, turn down the level controls on the speaker, or consider using additional Alto Speakers.
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michellemolinaAug 22, 2025
Why Alto Speakers have hum or buzz?
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  Derek DavilaAug 22, 2025
  Hum or buzz in Alto Speakers can be caused by a few factors: * Improper A/C grounding or ground loops. To fix this, "lift" the audio ground by using an XLR/F to XLR/M adapter on one end or re-route audio cables away from AC power and lighting cables. * Excessively long unbalanced cable run. Use the balanced outputs (if available) of your mixer or source equipment or use a "DI" (direct injection) box to convert your unbalanced equipment output to a balanced output. * Improper system gain structure. Reduce the INPUT level controls and increase the output level of your source devices.
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Dr. Cassandra MclaughlinAug 25, 2025
What to do if Alto PS 4 LA EVO have no sound, but the speaker comes on?
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  harrisjefferyAug 26, 2025
  If your Alto Speakers turn on but produce no sound, the issue might stem from the signal source or faulty connections. Check the VU meters on the source mixer and verify that the tape or CD is playing. Use headphones to confirm the instrument is sending an audio signal. Also, disconnect and re-seat signal cables, and replace any suspected faulty cables with known-good ones.
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William BentleyAug 27, 2025
What to do if Alto PS 4 LA EVO Speakers have no sound when connected to working AC power?
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  solsonAug 27, 2025
  If your Alto Speakers are connected to working AC power but won't turn on, the problem could be a faulty power cable or a blown fuse. Try re-seating the power cable at both ends and/or substitute with a known-good power cable. Also, check the fuse and replace it with the same type spare fuse in the holder.
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Matthew MooreAug 30, 2025
Why do Alto PS 4 LA EVO have lots of hiss in the sound, even when the mixer controls are at very low settings?
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  soliskimberlyAug 30, 2025
  Excessive hiss in your Alto Speakers, even with low mixer settings, often indicates an improper gain structure. Ensure the MIC/LINE switch is in the LINE (disengaged) position and reduce the level settings at the speaker. Refer to your mixer's owner's manual to adjust controls, including input sensitivity (gain), channel faders, and master faders.
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Damon FieldsSep 2, 2025
What to do if Alto PS 4 LA EVO signal sounds distorted even at moderate volumes?
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  vincent85Sep 2, 2025
  If the signal from your Alto Speakers sounds distorted even at moderate volumes, and the LIMIT light is not lit, it's likely that the mixer or another source is overdriven. Consult your mixer's owner's manual and adjust controls as needed, paying attention to input sensitivity (gain), channel faders, and master faders. Then, review the instructions in the Quick Start section of this guide.
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Mr. Joshua Anderson MDSep 4, 2025
How to fix hum or buzz in Alto PS 4 LA EVO that changes when the mixer level controls are moved?
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  Ashlee JohnsonSep 4, 2025
  If you're experiencing hum or buzz in your Alto Speakers that changes when adjusting the mixer level controls, it could be due to an improper A/C ground or faulty equipment connected to the mixer input. Try disconnecting or muting channels one at a time to isolate the problem. Also, it might be a faulty cable between the source equipment and the mixer, try substituting a known-good cable for the suspected faulty one. Refer to the owner's manual of the faulty equipment for troubleshooting help.
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Kevin ColeSep 7, 2025
What to do if Alto PS 4 LA EVO have no sound with a microphone connected directly to the MIC/LINE input?
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  Sharon TapiaSep 7, 2025
  If you're getting no sound from your Alto Speakers with a microphone connected directly to the MIC/LINE input, it's possible that the microphone requires phantom power. The EON does not supply phantom power. Switch to a dynamic microphone, use a battery powered microphone (if possible), or use an external phantom power supply for condenser type microphones.
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Oscar CarrSep 10, 2025
Why the inputs from INPUT 1 and INPUT 2 aren't coming out of the OUT connector on my Alto PS 4 LA EVO Speakers?
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  Michelle PriceSep 10, 2025
  If the inputs from INPUT 1 and INPUT 2 aren't coming out of the OUT connector on your Alto Speakers, it's likely that the MIX/LOOP SWITCH is set improperly. Ensure the MIX/LOOP SWITCH is set to the MIX position (depressed).