monkeytree said:
all of them are connected in parllel my sony home cinema 2nd hand has not broken in a year of non stop music it goes 2 poud for my family but i find it very quiet.
They certainly shouldn't be connected in parallel to a home theatre system?, if so it's not a 'home theatre system' it's only a mono system.
If you've paralleled the eight speakers you listed that gives a combined impedance of just under 1 ohm - this would almost certainly kill almost all amplifiers (unless the volume was kept very low?).
So I'm presuming you've connected six speakers to the six channels of a Dolby 5.1 system?, which is quite correct. If you've paralleled the two 8 ohm Sony speakers, that will give 4 ohms, and again should be fine - most theatre systems are pretty cheap things, and usually feed 4 ohms (often based on cheap car radio amplifers).
You might like to have a look at
https://www.colomar.com/Shavano/speaker.html which gives helpful advice on PA speakers - the entire site is very useful!.
I don't mean to try and 'put you down' at all, but you don't appear to have the slightest idea about what you're trying to do, I don't think you've got the slightest chance of building a high power PA amplifier at your current level of experience (it's not a project for beginners!). If you wish to get experienced at electronics, start with simple project and work up - starting at the top will only frustrate you when things don't work, and all your expensive parts destroy themselves.