I just picked up an 2x12 cab loaded with 2x 15 ohm celestion g12h65"s out of an old Marshall cab.Don"t know what that makes my cab rated and want to make sure I match it correctly to my Jet City JCA50 amp "2x8ohm"or 16 ohm jack selection.I don"t know if the cab is wired in series or parallel and don"t know if it matters.I think it makes the cab close to an 8ohm.Also,I beleive I"ve heard you can be safe and always run an 8 ohm head into a larger ohm cab but not the other way around.Thanks for the help!