RM100 matching impedance with RS125XL cab

[Poliack]

Hello,

I have Randall RS125XL which is loaded with 2x12 1x15 combination of speakers. Even though the speakers are wired in series-parallel, the cab doesn’t show the advertised 8ohm +/- impedance, which is a known issue, but instead it shows around 5.3ohms. I use this cab with my Warhead X2 without any issues but I am not sure how would I pair RM100 with it. Which impedance setting should I use? 4 or 8ohm?

 

[Poliack]

After researching more, I have realized that the question was really dumb because what I measures was DC resistance (5.3ohms) which is usual for 8ohm speakers and speaker cabs according to google.