DLC86
Roadie
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Actually I just checked the datasheet of the icepower module that's likely inside the PS200 and it says it can provide 130-140W of continuous power into 4 ohms.The assertion here is that these class D poweramps cannot provide their rated wattage in a sustained fashion. The PS200 gives 210W at a 4ohm load. But that might just be a peak reading.
So the theory is, more wattage means more headroom, means more chance of actually sustaining 100W continuously into a 4ohm load.
That's referred to the thermal shutdown though, it isn't explicitly mentioned if the power supply can steadily handle that (theorically it should)
ICEpower 200AS1 - ICEpower Shop
Featuring an extremely capable fly back power supply with a continuous power capability of 160 W and a short-term power of 300 W, combined with a 1x 200 W class D amplifier. The 200AS1 is designed for use in guitar amplifiers, bass amplifiers, subwoofers and active speakers without the need for...
shop.icepoweraudio.com
EDIT: now I see that it's stated in the main description actually, and even in the link preview you see here