Okay, what i am doing *is* a hack but it doesn't really involve an apple but I would like someone's advice.
Bascially, I am sick and tired of the low volume outputs from the headphone jacks on laptops.
So what I did was to tear apart a crappy set of computer speakers that were self-amplified.
I then desoldered the speakers that connected to the amp board.
I then mounted the amp board and volume and headphone jack into a little plastic box.
It works fine but it gets quite warm. Seems to be warmer than when it was mounted in the orginal speaker boxes.
Also there is now a low constant hum that wasn't there before (this hum is not volume dependent, its the same volume no matter what the volume is set at.)
Do i need to keep a resistor across the speaker terminals? and if so, what size resisitor?