Two different mics and two different sound sources, I don't need the battery box, just independient L/R level control...
maybe i am lost but doesn't the mic depend on if you need a battery box/pre??
if you are running 48v mics whether its on 2 sound sources or not you can't just plug them into a tiny recorder (like the iriver) even if it has l/r adjust knobs
you are going to need a recorder that will supply 48v and give you l/r
where as if you have plug in mics you might get away with the recorders power and not actually need the battery/pre
basically though depending on your mics and what they need for power you may not need l/r on the tiny recorder itself because you could use the battery box/pre l/r
but again maybe i'm lost here
with that said - like flipp said the mt1/2 is a tiny recorder with l/r and i would say its "tiny"