400+ with 4 x 8ohm cabs?

[LordCliff]

Hello,
I've got a 400+, and usually run it at 4 ohms (two 8ohm cabs). And want to add two more 8 ohm cabs, to make it run at 2 ohms. But there are only two 2 ohm out puts, how is this done properly?
I have a PH 410, a 15, and an older 18cab, and just got another 410. want to run it all at once (and see what madness it brings haha)

 

[Areola]

if you run it like this...

4 Ohm out -> in 8ohm cab out -> in 8ohm cab
4 Ohm out -> in 8ohm cab out -> in 8ohm cab

Then you'll be fine. Actually, you might need to check that with someone... You might have to run that system out of the 8ohm outputs, however a slightly mis-matched (by x2) isn't a huge problem.