PA speakers and dj amplifier help?!?!?

Question

can i use 250 rms 8 ohms dj amplifier to a 300 rms speakers?!?!?

Answer 1

You can use any size amplifier to drive any size speaker as long as you do not exceed the ratings of the speaker or amplifier. Playing even a 300 watt amplifier at a very low level through a 20 watt speaker is safe because although capable of 300 watts, the amplifier is only producing a couple watts at that level. A 20 watt amplifier can produce fairly loud sound in a 300 watt speaker, even though that speaker is not receiving anywhere near its capacity. In your particular scenario I can see only one potential danger. If you try to exceed the power rating of the amplifier (playing too loud), you should hear distortion, a cue for you to turn it down, hopefully before part of your speaker goes to tweeter heaven. You see, even though your amplifier cannot exceed the power handling capacity of your speaker (250 into 300), if you push the amplifier too hard, it could begin to "clip". It will sound horrible, and send essentially direct current to your speaker. The speaker components are designed to handle alternating current (audio waveforms), not a continuous dc voltage. If it goes on long enough (takes just a second) the voice coil in the tweeter will melt and smell awful. Speaker and amplifier ratings and recommendations are not an exact science, for many  reasons. Generally, if I have a 300 watt (rms continuous rating) speaker, I will drive it with a 700 or so watt amplifier. I can't clip the amplifier and fry my tweeters easily, and the extra power for the musical transients (short bursts of high power) gives the music clarity and presence you can only achieve with power. But having that  capacity requires careful operation, lest you launch your speaker components out the front of the cabinet. Just train your ears. When things start to sound bad, they are about to get expensive.Cheers!

Answer 2

as long as the speaker rating is not less than 8 ohms, you should be fine.

Answer 3

Yes - go for it.