UltraLite Main Outs straight to headphones?!

[tk]

I noticed that when I plugged my headphones directly into the main outs by mistake on my UltraLite one day they seemed adequately powered.

I rigged up a dual-mono-to-stereo jack adapter and the unit seems quite able to drive headphones right out of any of the rear output jacks, although with a little less volume than is available through the front phones jack: -3db@64 ohms, -11db@300 ohms... not that you should probably be monitoring at full volume anyway. This seems quite adequate to me. Of course, the advantage of using the main outs is the main volume control on the front of the device, effectively giving you two independently controllable headphone jacks.

My ears can't hear the difference; certainly for cheap live monitoring it's fine. This is a nice discovery for me because it lets me use the main outs as mixing board phones and the primary headphone outputs as musician monitors.

Has anyone else done this? It makes sense that the output amplifiers would be fairly high powered for high fidelity output and can handle the current draw, but I want to make sure no one else has done this long term and had problems afterward. I can't think of any reason this should be a problem since good op-amps are usually rated to handle continuous short-circuits, but better safe than sorry!