it looks like youve only got two outputs and 4 speakers,so this isnt going to work
also
for £300...
its going to be bait.
good mate of mine has a 10k rig which he's spent...probably near on £25k on...
as far as using any big(ish) rig
your going to need a crossover,
if you dont know what a xover is,basically
you have two(or more) cross over points (frequencies) which the unit will split to seperate signals,and seperate amps
i.e
subs and tops.
and as a general rule of thumb with standard 19" rack amps,one amp to every two speakers...
so to achieve anything close to a decent sound,
you HAVE to spend more money
and then you should invest in a decent crossover and amps before you invest in more speakers.
is it obvious i study this?