Interesting - I'm looking for a battery powered setup with a bit more guts, to use playing fiddle and bass outside for folk dancing (with a UK Goth Morris side, so I don't need rock band volume or long endurance). I already have a Micro Cube RX - a great sound, but not very loud. I wonder if you can take a line from the REC OUT/ PHONES socket to say a battery driven PA cabinet with enough frequency range to handle bass? Any ideas please?