Audio Split - Pre Amp

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Suraj143

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I'm making a 2.1 subwoofer design using TDA7377.Schematic shows only a one satellite channel. I have below doubts.
1) Do I need a C4 cap?
2)C5 & R7 forms a small filter is good enough without feeding the amp directly from pre amp?
3)Any simple method to pass trebles for satellite AMPIN?
 

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C4 does seem redundant, as there are other capacitors in either signal path.

I'm not sure what you mean otherwise?
That appears to be one half of the stereo section & presumably the sub amp is another item. The simple high pass just removes some lower frequencies from the main stereo channels.
 
Thanks. So I'll remove the C4.

Regarding high pass filter
I need a very basic high pass filter. Without a filter I checked the amp, & I feel like I need more trebles
 
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