If you can't run an open rig and size of gear is an issue, the Greenmachine GM standard Microphones are worth consideration. Greenmachine web site is here (no affiliation whatsoever/ sorry only in german):
http://www.geocities.com/greenmachine_audio/de-mic.htmlSpecs given: range 20 - 20.000 khz, pressure up to 115 dB, mic diameter 7 mm
Greenmachine also offers a battery-pack. I hooked it up with the iRiver 120 and it makes a really nice combo. The batt-pack is velcroed to the back of the iRiver and can easily be stored in a shirt pocket for example. Fix the mics whereever you like, but be careful of shock transfer.
A mp3 sample (Taj Mahal Trio - Sanzibar - 2007-06-17 [gm >gm bb > iriver120rb] is here:
http://www.mp-acm.de/greenmachine_2007-06-17/mahal_taj_2007-06-17_sanzibar_greenmachine.mp3I posted two complete shows recorded with the Greenmachines at etree. Please note that the volume at the shows was extremely loud and the bass was massive (shirt wavered from sound pressure). For these conditions the little gadgets did extremely well, imo. [My Church-Audio cards were too large to bring into the venue ...]
Honeytribe, Cologne - 2007-06-10:
http://bt.etree.org/details.php?id=507383Gov't Mule - 2007-06-10
http://bt.etree.org/details.php?id=507363And here 2 pictures of the mics, batt-pack and the piggy-back-iRiver-combo:
Cheers from a hot Germany
Ulrich