So is the logitech z623 rated at 200 Watts or 400 watts.

[timmyleeturner]

I find many listings with conflicting info. Amazon is listed as 400 and Walmart has the same model number listed as 200 Watts.

 

[Nigel Spike]

Logitech, the manufacturer, says 200W. I would trust them more than any shopping site.

Nigel

 

[americanaudiophile]

Logitech rates them at 200w rms and 400w peak power. The peak power number is totally useless and the rms rating, since it doesn't have to meet FTC power rating guidelines the way AV receiver do, is questionable but at least can be compared to other similar products.
In real life it doesn't matter. If it plays loud enough it doesn't matter how much power it has. More power doesn't make the quality of sound better it just makes it louder.