Ok, as far as I understand it should I have a set of unamplified speakers any sound I would get out of the would be a direct product of the amount of energy my sound card gives off. Now I believe the larger the driver, the more energy it takes to produce any sound.
Ok… onto the bluetooth. How much energy does a bluetooth signal convey? Could it power the signal in a set of earbuds? (1mm driver?) If so what kind of energy drain are we looking at for the bluetooth device sending the signal? How loud could we get the earbuds to get? Or would it require an external battery on the earbud?