Questions about wiring Rockville SS8P subwoofer

[1TrackJack]

Someone (Mrs. Clean) threw away the box that had my wiring kit. What size fuse is required for the power connection? And, do you just twist wire the 12 ga. wire from the provided plug-in to the 8 ga. lead from the battery?

Thanks

 

[SoCalGlide]

Maybe this will help:
https://www.rockvilleaudio.com/content/Manuals/SS8P_Manual_HR.pdf