Helix DSP .2 is only 8 channel but how can I run 10 channel

I have two set of Focal ES165 KX2 component.

One Hertz 12" sub.

One Zapco 6 channel amp.

One Zapco 4 channel amp (will order one in a day or two)

Here is my plan.

Front Focal mid and high component will take 4 channel from 6 channel amp

Rear Focal mid and high will take 4 channel from 4 channel amp

one 12" sub will bridge two channel from 6 channel amp

But my Helix DSP .2 only have 8 channel. My though was going to use DSP for Front 4 channel for mid/high. And two channel bridge to one channel for sub. So only use total of 6 channel on DSP. The rear Focal component mid/high will run RCA directly from the head unit to the amp without using DSP.

Please advise if better any better idea.

Thank you,

 
Don't use rears. Sell one of the amps and buy a mono for your sub.
Thank you. I haven't buy 4 channel amp yet. So If I do a mono amp for a sub. My total of speakers are 9 including 1 sub. How can I do 8 channel DSP with 9 speakers and only 7 channel amps.

My Focal component passive x over need bi-amp(4 channel) and I have two set of this so need 8 channel.

Thank you,

 
ditch passives run one tweet each on ch 1-2, run two mids in parallel on each chs 3-4, bridge ch 5-6 to sub. I say one tweet to start because they take little power to get loud and often times you dont need 4 tweets. The dsp would be set up with the tweet outputs ran to ch1-2 and the mids would be ran to ch3-4. The sub outs would run to ch5-6. Unless you want to do three way active then run tweets ch1-2, 1 mid on each ch3-4 and last pair on ch5-6. Then by a mono for the sub. Rcas in this case would go tweets to ch 1-2 midrange to 3-4 and midbass to 5-6 then sub outs to your mono. The dsp should have the option to run 2way with sub and 3 way with sub. Either way you go ditch the passives with the dsp you wont need them they are set filters where as the dsp has changeable filters to tailor the sound to better suit the vehicle. With the passives you dont get much more then the sound they make when you plug and play. Then you just run the required full range rcas from the head unit to dsp for the signal. Bada bing bada boom. Tune tune tune on that dsp tell you find that perfect sound.

 
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