pete10uk

As I said in my earlier post, I'm not an expert in acoustic measurement or interpretation. Is there any not too heavy source of information to have a read up on? I have a feeling that this is going to be come more of an issue going forward, and it is always nice to be able to get into constructive conversation instead of sticking my heading a bucket of sand.

That figure is way too low for anything useful. I've just done an install in France and the venue has had council fitted limiters installed, while I'm not an expert in venue limiters or correct acoustic measurements, I can tell you when it hit 82db the system shut down dead, that was 82db on the limiters screen and my iPhone spl app. It was hardly loud enough for a cough at 2m. The annoying thing was the bar 4 doors down was kicking out 84db from the other side of the street.

That is my understanding in basic terms. There is obviously more to is when you look at the calculations, but like you I'm not in to ohms in a big way. I would and have looked at it in the way I've described and it's been fine.

I'm by no means an expert but in the real world yes it will work. Your amp will be rated at a particular wattage @ 4 ohms, @ 8 ohms you will be driving twice the residence, so your amp will provide half the wattage. For instance if your amp is 150watt @ 4 ohms, it will give 75watt at 8 ohms. Depending what your speaker is rated at will depend whether it sounds any good. I may stand corrected though!