If you mean you have two dual 4 ohm voice coil subs with voices coils wired in parallel wired in parallel again, yes that will give you a 1 ohm load.
If you're talking about the BP600.1 then thats fine. That amp is 1 ohm stable. If you have the GTO601.1 don't doeeet!
the bp, what does this set up do for me?
the reason i ask is because I read it sends 300 watts to each sub, now I don't know how I have them set up but its not at 1 ohm, so am I still getting 300 per sub, i think not, right? so is this the best thing to do to get the best out of the jbl amp?