I would like to use one of these iPod knock-offs as a portable signal source. For example, I could produce a complex waveform in software and play it as an mp3 via the device's SD card slot.
My question relates to how much current could be reliably supplied by the player without damaging its output stage, given the same repetitive full volume signal on both channels.
If I plug in a 3.5mm cord (instead of headphones) and solder left and right channel leads together to produce a "mono" signal, how much current could the output stage be expected to deliver on a constant basis?
For example, would it drive an 8R air core coil at frequencies below 200Hz?
Robert Miller