[Morris[_3_]]

Okay, Let's say I've finished dealing with the front two speakers.. as
it is quite loud I decided not to mount rears speakers.. at least for
some time now.

I've decided to put a subwoofer / bass speaker though, so here is my
idea. My first amplifier being a 2 channel Audiobahn 40 amp amp with
RCA input (which is pretty obvious) but also a RCA output pair. So as
far as I can tell there shouldn't be any issue with connecting a
second amp to the first one? But would I need to change the AGU fuse
on the battery? If it's a 40 amp at the moment - and the additional
amp would be a 30 Amp one, shouldn't I change the 'main' fuse to 70
Amp?

Thanks in advance to all your responses,
Morris