cannl set up.
ughh. hmm il try to answer your ? the best i can haha.
well the preamp outputs are useing y adapters . on the left output with y adapters are connected to my cerwin vega power amp. and the right channel with the y adapter is plugd into the onkyo power amp.
my equalizer controles both channels. so i use the left side of my eq for bass which my cerwin vega is plugd into the left channel.
and then i use the right side of my eq to use for hize which my onkyo power amp is plugd into.
as you can see in the picture of the equalizer the left side of it only 2 levels are up which is bass. and all the others are down
and the right side of the equalizer all the levels are up for the hize side and a lil bass is up to.
so the cerwin vega is bass power amp and the onkyo is hize power amp. but i can change that just by moving the levels on each side of the eq haha.
in the back of the onkyo only 2 speaker channels are being uses the right ones. and the 2 left channels dont have nothing plugd in.
in the back of the cerwin vega power amp it can only plug in 2 speakers 1 15 each channels.
the box has 4 speaker channel plug ins. 2 for the 8 wooffers and 2 for the 15s. none for the tweeter horns tho.
so i plugd in the 2 15 channels to each channel in the back of the cerwin vega amp.
but both channels use bass since the whole cerwin vega amp is running of the left channel from the preamp which is controled with bass from the eq so it worked out good for me at the end no voice just pure clean bass.
and the right side dont have to much bass just clear sound of hize haha straight up sounds amazing. not to much bass not to much hize sounds perfect to me.
well i hope i answer'd your ? and if i didnt im sorry i tried my best haha thanks for your time and interest and have a grate day . : )