@ CQuartes, one of the toggle switches will change stereo to mono, the other is probably a limiter switch to stop those surface blasts on close items, plug them in fully, turn up the volume on the machine and headset then flip the toggles one then the other to find out which is which
@ Treasurechic, I personally have never used the Koss, but almost everyone i have talked to don't, the first thing most do when they get a new machine is to sell them.
I have read reports that they fall off when you bend down too, of the two you have i deffinately, recomend the jollies, turn the volume up full on the Sov and then adjust the volume on the headphones to suit.