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PUBROCKER.COM ...LIVE SOUND INFO...MAKING IT WORK...STAGE WEAR 101...LINKS
Part 3. - I'll finish this in a minute... Here's what is coming!
The Drive rack?
Power amplifiers: Taking your mix to the mains. Power amplifiers do exactly what their name implies, they amplify the signal…
Power ratings – what do they mean?
Ohms law and you
Matching amps to speakers. A hotly debated topic, finding the correct match of power amps and speakers will forever cause arguments in this industry. While logic dictates that an even match is your safest bet, there are many who recommend buying an amplifier that is, in fact, able to produce more power than the rating of your speakers. While the output is not a constant number, that does not mean that your amplifier is going to behave at all times and not spike with a surge of power that, if it proves to be too much power, will blow speakers to bits… 1.5 X the rating of the speaker is what is sometimes suggested. If you are running everything carefully, that may be a set-up that can work for years and sound great. If you are not being careful, though, you have set yourself up for speaker failure by supplying that much power.
I have a good way to determine how much power you should be using compared to the numbers listed as ratings on paper. I look at how the major companies power their own boxes when they come out with powered versions. The amplifiers that are built in are almost always smaller than the rating of the box, because the company that builds the speaker wants to ensure long life, at the expense of only a few (really, very little actual volume is being gained by adding more power) dB in output… Pretty good trade-off if you ask me!
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