Personally, I have no idea. But using a tool called Google :wink: I was able to find a few forums where people are stating they are 2x 16ohm speakers wired in parallel, giving you an 8ohm cab.
Thanks for all the reply's. My question is regarding the series/ parallel wiring-not ohms.
Thanks for your response Addictedtokaos but to let you know I have both the Recto cab and the Road King cab. The recto cab is rated at 8 ohms and the Road King is rated at 4 ohms- I know that but thank you for your help.