Minimal setup for grabbing a room impulse

Hey hey,
I'm looking for a small setup to grab a room impulse response. I can't take my 
computer in there and don't have a notebook. I do have a field recorder with 
extra mics, which are nice enough. I also have a smartphone and a bluetooth 
speaker. It's not the best, but decent. Can something reasonable be managed 
with this? I seem to remember that a sinesweep doesn't require the best in 
speaker technology.

Or do you have other suggestions which wouldn't need too much more?

Please reply to all recipients of this mail, since I still sometimes miss 
list-mails on this address.

Best wishes,

Jeanette

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