oren hudson Messages: 274 Registered: March 2008 Location: Gastonia, NC
Senior Member
Welcome. You're speakers were made by CTS and date to the 13th week of 1969. It would be best to check the cab ohms with a multi-meter for certainty, but normally a 2 speaker cab from that time would be 16ohms each and wired to be a final of 8ohms for the cab. An 8 ohm cab will do no harm to a 4 ohm head. It will only generate half of the power of the had with that matchup. You could add another 8 ohm cab for full power of the head.
I would also say that at that time, a 2x12 would probably be designed more for guitar than bass, but not a big deal either way. Just don't fart it out constantly.