You're right in that 2 Compacts will be a 4 ohm load for the amp.
The amp's minimum of 4 ohms is regardless of whether it's 1 or 2 cabs that present that load.
E.g. an Ampeg 8x10 cab is 4 ohm, so that's it for the amp or as you have pointed out you can use a pair of 8 ohm cabs.
Hope that helps?
Also a quick note on the Barefaced Compact cabs - They only have one socket on them so your amp will need 2 speaker output sockets, unless Alex offers a 2 speakon option to daisy chain the cabinets (?)
Cheers,
JTB
[quote name='Eight' post='514129' date='Jun 15 2009, 01:17 PM']Sorry to ask this - because I know somewhere the information I need already exists... but I couldn't find/understand it.
The Compact is an 8ohm cab right? If I buy a 300W amp with a minimum impedance of 4ohm - does that mean I have to have two Compacts (taking the impedance to 4ohm)? Or does it mean I can't use two 4ohm cabs (which would give 2ohm)?
i.e.
Is 8ohm higher than the 4ohm minimum, or is it lower?
Cheers.[/quote]