is it possible to run 6x9's and say 3 sub off 1 amp if so what type of amp or wud u be better getting to amps
All depends on the subs you decide to run...
It is possible to run all that mentioned above on the one amp, i do this myself...
Sure is, u will need a 4 channel amp mate and it will work them. but to get the subs to full level u will have to have the same or higher output on the amp than all the subs added together. i.e. 3 250w subs and 250w 6x9's, u would be best with a 1000w amp.