i don't think you will get the same tone as a speaker under power, and you may need to be careful about blowing your headphones (or your amp if you disconnect the speaker). large speakers can absorb a lot more power, picture running your home stereo speakers off your ipod, it doesn't work. they do make practice devices ( the rockman was a big hit as you could use headphones, or run through it, for that 80's rock sound), not sure if they have one with the sound you want.