amp set at 4 and connect to 2 8ohm cabs. is rite.
less resistance will be a bit louder.
4 ohms louder than 8 ohms. lower the number the less resistance so louder.
Or run it on 16 ohms ?
I have been told to run on 8 ohms by the repairer dude.
My pic may confuse some, that amp unfortunately got stolen way back and the Les Paul.