bigger speakers or more speakers

[Manfrensengensen]

If you have a speaker that has a max level of 120 db. You add another and gain 3db. So 4 speakers vice 2 gains you 6db or 126db max.
It takes about 10 db to sound twice as loud. Then the further the sound travels the lower the db level.

The other problem you have with conventional cabs is the HF horn is usually about a 90deg x 40deg coverage. If you put 2 of these side by side, the HF's run into each other
causing cancelation or amplification of frequencies messing up your sound. This is why line arrays are used......they have very narrow dispersion horns so many can be used together without interfering with each other so higher db/SPL can be achieved.

[cryptokoan]

So if i just daisy chain more speakers on to the same amps they aren't losing wattage?

or are you saying separate speakers with separate amps as well?

[Manfrensengensen]

Daisy chaining speakers just splits the wattage between the two.

To gain more volume you add 2 more speakers and another amp for the pair.

[KRStudio]

Daisy chaning your amps will in most cases increase your wattage. Most solid state amps will show ratings like 300 watts at 8 ohms 500 at 4 ohms. Look at you amp ratings AND ohm rating. If you have cabs that run 4 ohms and your amp has 4 ohm minimum don't add to it.