ust4ever1

There's a few ways to approach this, but it depends how much you would want to spend.
It'll be a little bit more costly if you don't want to be able to hear the amp as a bystander etc.
 
She could use a handheld recorder such as the Tascam DR-44WL. This would involve plugging the output of the amp into a device that records it onto a Micro SD Card. 
 
Alternatively, something such as a Focusrite iTrack Pocket Audio and Video Recorder would record the amplifier with the benefit of docking to her smartphone (provided one is available.)
 
If she has a computer with a jack input, you could connect the amp directly to that and record it using a program like Audacity.
 
Let me know if these where the types of things you had in mind, or if you need something explained a bit better!
 
Sources:
Many years of knowledge as a Sound Technician and Audio Enthusiast!

There's a few ways to approach this, but it depends how much you would want to spend.
It'll be a little bit more costly if you don't want to be able to hear the amp as a bystander etc.
 
She could use a handheld recorder such as the Tascam DR-44WL. This would involve plugging the output of the amp into a device that records it onto a Micro SD Card. 
 
Alternatively, something such as a Focusrite iTrack Pocket Audio and Video Recorder would record the amplifier with the benefit of docking to her smartphone (provided one is available.)
 
If she has a computer with a jack input, you could connect the amp directly to that and record it using a program like Audacity.
 
Let me know if these where the types of things you had in mind, or if you need something explained a bit better!
 
Sources:
Many years of knowledge as a Sound Technician and Audio Enthusiast!

I guess you could say that chip...

...Is chipped.

Buy some studio monitors instead.