Anyone ever used a Soundcraft Spirit Notepad? They look pretty nice. Maybe not the monitor capabilities of the Compact4 but it's amazingly small for all they cram into it. http://www.soundcraft.com/product_sheet.asp?product_id=1
i used its predessor the Spirit Folio Lite for a long time. then moved to a Shure FP33 (3ch), and then 6 mo's later to the Sony DMX-P01 (4ch). the only drawback to the Folio is that the wall wart is a bi-polar supply, ie +/- 15v. back when i bought mine, there were few DC-DC convertors available unlike today. so i used a Zapco PX power supply (i was big into car audio back then, well much bigger than now) and i mounted a Switchcraft miniGQ connector to the mixer and an On/Off switch right next to the factory input connector. Wired the +15v to the pos rail right after rectifier and the -15v to the neg rail after the rect.and the ground to the board's bipolar ground. ran the whole thing off a 10AH 12v SLA and never ran out at a show.
i liked it a lot and made some great tapes with it. it did not have true +48v phantom but it did have a nice loud headphones out. looks like the Compact4 is pretty cool and if they did actually step up to a true +48pp, then maybe the unit has a fully bipolar power supply as well - that would make a difference to me - +/-15 = 30v peak-to-peak swing vs only 12volts from a single ended 12v supply... bummer that it is only 2mic in...
anyway...
my two cents
nism