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I have done a lot of reading and I keep seeing different results

starting from scratch im trying to put a system in my boat

is it true that your speakers should be less wattage then what the RMS watts is being sent to them?

example 100 watt power to speakers - speakers should be 75 watts?

im trying to run 4 speakers and a sub

thanks in advance
 

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Unless it’s different for marine, here’s my understanding from the car audio world:

It’s ok to have a higher wattage amp than speakers.... will likely mean you set gains a bit lower, which just ends up reducing risk of clipping (which is bad for speakers).

Even if you set gains accurately, many speakers can handle more than rated power (within reason) as long as there is no distortion.

Keep the signal clip free / distortion free, and be aware that the amp is more powerful (so you don’t blatantly send way too much power to the speakers), but otherwise you should be good.
 

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I'd recommend putting in larger speakers if you can, for example a 6x9 will put out more sound than 6.5 round in a boat. They used to have 7x10 they really worked nice in boats.

Wattage ratings are a recommendation, 100w speakers should work well on 100w amp channel. Most people say run more amp power to stay out of clipping, but you have to set your gains so you don't toast the speakers as well. You can't let the system go loud as it can with larger amps, but it will sound better without any clipping and probably can go louder without clipping..
 
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