Alright I read all the views. To all the engineers out there, I have a few questions.
Just a random example
Onkyo Power Amplifier:
Onkyo A-5VL - Integrated Digital Amplifier | Model Information | Onkyo USA Home Theater Products
Power output: 105W x 2 (third row in the amplifier specs section)
Power consumption: 110W (second line in the general section)
Man, this machine is power creator. :O WTF ! You just input 110W and you get 210W. Voila. Einstein must be wrong about his energy equations.
(I am not answering the logic behind this since a lot of guys are finding it strange. It indeed looks strange but is perfectly fine. You guys figure out the mathematics behind this)
Second thing. Running a pair of Good speakers with low wattage, not so good amplifier can damage your speakers.
And somebody said its like running a Mercedes body with a M800 engine. It sure will move but won't be worth it.
The second part sure seems logical and acceptable but where did the damage thing come from ? Going with the same analogy, its similar to saying that running a Mercedes E240's body using a M800 engine can damage the body.
Again you guys figure out.
The third thing was about the correlation between the THD and the wattage. There sure exists a relationship and as rightly pointed out the THD will increase as you increase the gain. But what if I do not want to push the limits ? I am good with listing in my room, with the noise level barely audible 20 meters away from my room, why do you think I require more than even 25W per channel @6 ohms ? I am sure the THD will be perfectly under control in that range.
(BTW have you guys even seen the second part of the equation ? Some watts at some OHMs ? There is a logic behind that as well and the second specification is rather more important)
Again think over.
And just to add, I am also a Mechanical Engineer by Qualification and I perfectly know how energy moves. You guys just need to make sure that you are comparing apples to apples.