Thanks!! Does it matter what kind of RCA cables I run (audio RCA)?
Audio quality cables, make sure the length is enough- get what ever grade cable fits your budget.
Are there specific RCA cables for this type of installation?
Not familiar with bass tubes (don't like them) but they should use satndard rca interconnect cables.
I also only have like 12" of yellow (power wire with the fuse) comming off the bass tube, not sure what gauge. Should I splice on a heavier gauge wire to connect to the battery?
Whatever gauge is on there will work, no need to spend more on heavier gauge- just don't go smaller.
And one last one, when I splice into the remote turn on wire (the blue one) off the headunit do I just connect the wire from the bass tube to the wire comming off the headunit?
Yes.
Thanks again!!