400watt amp @ 400watts VS 800watt amp @ 400watts

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well I think you have to rephrase ur question a bit 400W out with 400W in (power Supply) or 400W amp doing 400W?? lol if it's was the 2nd question (400 or 800W amp doing 400W) I would try the 800W...more headroom...less chance of clipping doesn't matter if ur speakers are only rated 300W or something...
 
The 800 watts because the 400 watt amp will only do 300-350 in the real world.

Driving a amp close to it's max rating is dangerous for your speakers as it will be close to clipping or clipping.

The power supply in the 800 watts should be bigger than the one in the 400 watt, so doing "only" 400 watt the supply in the 800 wouldn't be very stressed, where as the 400 watt would be doing max.

However if they are both build very well, there won't be much difference but they would be very expensive.

I would go for the 800 watts.
 
Using the LM3886 datasheet as template, then THD is lowest at max output, but in real life this isn't very important compared to the first few watt which is gonna be used more than the last few watts.

So in you sinewave test I would guess that the 400 watt amp would have less THD than the 800 watt one would.

This is only based on the LM3886 Datasheet, so don't count on it.
 
Flemming J P said:
Using the LM3886 datasheet as template, then THD is lowest at max output, but in real life this isn't very important compared to the first few watt which is gonna be used more than the last few watts.

So in you sinewave test I would guess that the 400 watt amp would have less THD than the 800 watt one would.

This is only based on the LM3886 Datasheet, so don't count on it.


yeah, that'd be right... there goes my arguement.... lol
 
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