Oops, just noticedd my poor spelling- was very tired-t'is my excuse.I really do know how to spell piece....anyhow:
Yes you can plug into the smokey and then into an amp-it provides a massive signal boost- didn't sound too bad but I'd be wary about running a signal intended for a speaker into the front end of an amp-I have no technical idea on this-just seems a bit risky running that level into an amp.
Also works in headphones though for some reason only one side-that may be my headphones- besides, even when at full tilt, the smokey is not loud and I can't see it bothering anyone else unless in the room with you.
The thing about the smokey is that it does give a good rendering of the guitars tone- a Strat sounds like a Strat, a Tele like a Tele and you cannot say that about some of the micro amps I have played over the years. If you do get one, keep it in a protective box and unplug when you are done-the batteries seem to last well too-mine has been going strong for over a year and I have used it quite a lot. Fits inside guitar case too.