Is it possible to use a headphone amp with an electric guitar? What would the sound be like? Is any other equipment necessary?
I have a Graham Slee Solo and HD650s.
you could plug the line out from a guitar amp, of a guitar amp modeler(this one is mono though), or Multi-Effects setup. but it can be a trial to get rid of hum. my amp has a cd line in, and headphone out, but it tends to hum over head phones.
they even have purpose build guitar headphone amps.
the multi-effects setup is the most fun, some have a line in and headphone out built in. if you have a good music shop local i bet they would let you try out some with your guitar and headphones. they run from 50 bucks up to as much as you can afford. sorry about your wallet.