Pls help to adjust audio system (Alpine ICS-X8, PDX-V9)

[lennono]

Hi guys!

Pls help me correctly adjust the system.

My car audio system:

Head unit - Alpine ICS-X8

Amp - Alpine PDX-V9

Front 2-way speakers - Alpine SPR-60C

Rear coax - Alpine SPR-60

Sub - Alpine R-type 10'

I switched to OFF all filters at the amp, because I am cutting freq. from the Head Unit by X-Over.

Front is cut at 80 by 12.

Rear is cut at 63 by 12.

Sub is cut at (i) 25 by Subsonic at the amp and (ii) high freq. of the sub is cut at 63 by 24 from the Head Unit.

Questing: is it done correctly or should I cut at different frequencies?

The only problem I faced is correct adjustment of gains at the amp.

Front is adjusted at half gain (at 12 hours if imaging the clocks)

Rear - at 11 hours.

But at what level of gain should I adjust SUB ???

Thank you for your help!