Ohm my god, confused

rsvmark

so tomorrow night we play a charity gig. We are using our peavey Xrd 680s which as 4 jacks on the rear for speakers. We have 2 X 15" pa speakers and I I have borrowed 2 additional speakers. So do I connect all 4 speakers to each of the 4 outputs on the rear or do I daisy chain ie amp to speaker 1, then speaker 1 to speaker 2. On each side. Totally confused so any advice welcome.

ICBM

Very important - what impedance (ohms) are the speakers?

If either pair are 4 ohms then you must not connect all four speakers to the amp - at best you'll overheat it and make it shut down, at worst you could blow the power transistors (even in a Peavey!).

If both pairs are 8 ohm then you can either connect all of them to the amp or you can daisy-chain them if one pair of cables won't reach. Connecting all four directly to the amp is better though, because that way one pair of cables is not having to handle double the current.

rsvmark

@icbm thanks chap. All speakers are 8 ohm and will do as you suggest. Cables are nice and long

ICBM

Great, have a good one!

I thought it was worth asking about the impedance since a lot of Peavey 15" cabs are 4 ohm.