Planning to install a JL Audio PowerWedge MAX PWM110-WX powered subwoofer which includes a J2 250.1 monoblock subwoofer amplifier rated at 175 watts. 12v+ power connection will be 8 AWG from the battery, across the engine compartment, through the firewall in the usual spot on the drivers side, along the drivers side of the tub, to behind the back seat. Hoping to run a short 8 AWG ground wire to one of the rear seat hold down bolts. A 30 amp fuse will be installed in the power lead at the battery. I am planning to run CB coax down the passenger side of the tub, hence the sub's power routing. Any problems with this setup?

Do I need to beef up the factory battery cables to avoid voltage drops? I'm a newb at this so any help is appreciated. for your advice.

Head unit, speakers and XM module are installed, used the PAC C2R-CHY4 harness.

Thanks!