a while ago i read, at least i think i did, a thread about using a small mixer in place of a headphone amp. is this possible? i am having a hard time finding a used cab in my LOW budget range and i want to start hearing myself practice. if this is possible i think it would be good to buy a piece of equipment that can be used for more than just a headphone amp. i see that there are several for well under $100 but if i up the budget to the $80 - $150 range i can get one with effects, built in compression and a usb interface so i can do the "play along with" lessons and such. plus it seems to me that a mixer would have a better resale value if it doesn't work out. yamaha, nady, alexis and the dreaded beh........ all have units in this range. any suggestions to help a noob out?