Stereo amp wire install

[Toyelectroman]

About to install a 4 channel amp to power 4 6.5 speakers. Currently my boat has two batteries connected to a manual battery switch(not ACR). For the amp power wire do I connect to one of the batteries directly or to the battery switch?

 

[H20Rat]

Either work, but I like connecting directly to the house battery, with an appropriate fuse of course.

 

[mike_i]

Either way works. The difference is connect it to the switched side of the switch if you want power disconnected to it while the boat is being stored. Otherwise connect it directly to the battery if your not concerned about any current draw and it being "hot" while not in use.