I have a ‘66 bassman with out at 4 ohm bow can i hook up a 4×12 cab at 16ohm? So one 16 ohm cab into my ‘66 bassman

If your going to use both cabinets together all the time do your amp a favor.Load 16ohm speakers rated for 50 watts.I like 12″ Mod 50 16 ohm Jensens if your on a budget or of course Celestian Vintage speakers are nice too.4 12″ 16ohm speakers add up to a 4ohm load. This is exactly what your amp wants.In the event you only want to use one cabinet it will sit at 8 ohms and play just fine.Be sure to remove any and all fiberglass insulation and drill 2 one inch port holes at the bottom when cabinet is standing up.This simple procedure will make that old nasty ‘Muddy-muffily’ sound brighten right up and 3 times more sound will fill up the room at any volume setting.Playing with the volume lower will extend the life of your unit 10-fold .Remember to use fresh strings and switch to the lightest gauge you can find. You wont believe the difference.You don’t need that battery cable e string so never buy another one..

So if I use both the speaker and the ext. speaker outputs of my 67′ Fender Bassman amp simultaneously, that means I need two speaker cabinets of 8 ohms each? Also, I am planning to use this setting for playing bass, not guitar, so, what wattage do you recommend on the cabinets/speakers?

Thanks.

The part that you need is a 1M Audio pot for either volume control.

I need the fender part number for the volume pots on my 1965 AA165 Bassman. Anybody got that part number. I can’t look at the Amp because my son has it New Orleans and I’m in Oregon.