Hi, I'm looking to install an under seat sub and looking for an acc feed from the main fuse box. Anyone know which fuse number I need? It's only 120w (20amp) so think a direct feed from the battery is probably overkill.
120 watts is 10 amps I: You will want a permanent supply not acc. The amp should be controlled by the switched output from the head unit. If your van is a later model you should find a spare fuse box under the passenger seat that could be used as your supply.