In last week when I helping my friend wiring a 4 drivers passive subwoofer project with three user selectably impedance (2-4-8Ω), I think we can using the same method to wire the output transformer for plugable output impedance:
Connect the 8 wires from the output transformer and 2 wires from the binding posts to a 10 pins socket, then use some plugs and Wago connectors to wire four different output impedance. Very easy to make and cost less than $50.
Connect the 8 wires from the output transformer and 2 wires from the binding posts to a 10 pins socket, then use some plugs and Wago connectors to wire four different output impedance. Very easy to make and cost less than $50.