My truck was originally 6V. I converted it to 12V and stuck a cheapo, small, Chinese 12v radio/amp of the sort you can find all over eBay and Amazon in the glovebox to power the speaker in the dashboard. Now, a friend is putting together a pre-war truck but he is keeping it 6V. I have been unable to find a 6V version of these radio/amps. Is there one available or is there an easy solution to get 12V to it from the 6V system? Here's a picture of the type of unit I am talking about.
Just use a 6v to 12v step-up converter [cheap on aliexpress] You can get a 10a version which is good for 120w output And pair this with a Nobsound NS-10G pro [cheap] which is a 50w x 2 channel amp The Nobsound defaults to bluetooth [from your phone] or you can plug in a 3.5mm Audio Jack from another source. I had one in my 57 chevy and have 3 of them in my house [powering hidden soundbar stereo setups] I did a install thread back in 2019 about this https://www.jalopyjournal.com/forum...m-install-non-invasive.1155455/#post-13143271