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6 Frequently Asked Questions about “How big an outdoor power supply does the amplifier need”
How much power does a power amplifier need?
Clipping can damage speakers due to overheating. So stay with 1.6 to 2.5 times the speaker's continuous power rating. This section will suggest how big a power amplifier you need to fill a venue with loud, clear sound. Basically, the louder the sound system and the bigger the room, the more power is required.
How many Watts should a 4 ohm amplifier use?
If you are playing light dance music, the amplifier's 4-ohm power should be 1.6 x 100 W or 160 W continuous per channel. To handle heavy metal/grunge, the amplifier's 4-ohm power should be 2.5 x 100 W or 250 W continuous per channel. If you use much more power, you are likely to damage the speaker by forcing the speaker cone to its limits.
How much power should a speaker have?
If you are playing light dance music, the amplifier's 4-ohm power should be 1.6 x 100 W or 160 continuous per channel. To handle heavy metal/grunge, the amplifier's 4-ohm power should be 2.5 x 100 or 250 W continuous per channel. If you use much more power, you are likely to damage the speaker by forcing the speaker cone to its limits.
How many Watts Does a speaker amplifier use?
You could use a power amplifier of 500 watts per channel. Connect two loudspeakers in parallel on each channel. That way, each speaker will receive 250 watts (not considering the change in amplifier power at different impedances, and not considering cable losses). Note that if you parallel two speakers, their total impedance is halved.
How many ohms should a loudspeaker be rated?
If you are mainly doing light dance music or voice, we recommend that the amplifier power be 1.6 times the Continuous Power rating per channel. If you are doing heavy metal/grunge, try 2.5 times the Continuous Power rating per channel. The amplifier power must be rated for the impedance of the loudspeaker (2, 4, 8 or 16 ohms). Here's an example.
How many ohms should a speaker be?
Most speakers today are 8-ohm nominal, but you can find exceptions. At 8-ohms, you want to have an amplifier that provides at least twice the power of the “continuous Power Handling” spec. That will keep you from sending lots of clipped audio to the speaker and damaging it over time.