Supersonic Conquest radio's PR80 and PR80C

[Podbuilder]

15ohm woofer and 15 ohm tweeter in parallel not series for what I can see.  Yeah.. very confusing.  Remember this was thrown together when John Deacon found the circuit board in a rubbish bin.  He put it in the cab, but did he know the impedance of the audio transformer... probably not. Im attempting to make a replica and just trying to make sense of it.