My thought is that using those online calculators either proves that Axiom is totally falsifying the requirements on their specifications web page, or the calculations are all wrong.
Or you don't understand the specs which seems most obvious.
Just because a speaker generally uses only a few watts on
average doesn't mean there are no peaks beyond a couple of watts. Turning up the volume to get even a moderate SPL of 70 db sitting 10 feet from the speakers will have power requirements beyond just a couple of watts. That is the primary reason for having a larger amp, with higher capacitance.
Axiom likely advertises a min. of 10 watts for example because if Joe Blow uses a an underpowered receiver/amp (non-tube), it will go into clipping and that is what can damage your speakers. Then guess who gets the call with a complaint that no one told them what minimum power they needed to be using?
As for any audio company, there is an expectation they are trying to provide some type of minimum as a guideline for any customer who has little knowledge to know what might work sufficiently. Everyone knows you can power a speaker driver with a 9V battery, but that doesn't mean this is suitable for most common applications as it generally isn't practical (even though there are some battery powered amps out there which do work; but you have to be cautious about its use).
http://www.parts-express.com/sonic-impact-5065-gen-2-t-amp-with-power-supply--300-958I highly suggest you read more about electronics specs to better understand why things are posted on any audio site and know the positives and negatives of them before tossing out implied statements that companies and sites with power calculations must all be wrong or malevolent. You can find a ton of old threads discussing everything from the -3db/-6db to impedance and wattage numbers right here on the Axiom forums.
