Quote from: Roly on June 29, 2012, 10:34:26 AM
Unless you happen to use cans a lot, why would you expect a mono amp to have a stereo headphone socket? As it happens, as a soundie I do use cans a fair bit and have several pairs kicking around, so I'm well aware that they are normally stereo.
I would expect the headphone out to be a stereo jack because 99% of the headphones are stereo, and plugging stereo phones into a mono jack just give you one side working.
So, you send the same signal to L & R on the stereo jack and then you get sound to both sides.
Maybe a really old amp would have a mono phone jack (back when most home audio was still mono), but I don't recall seeing a mono jack for phones on equipment made since the mid 70s.