Classic 50

4 el84s. Now, there is some kind of impedance switch that goes to 8 ohms when you plug in another 16 ohm cab. The 4/10 are running at 16 ohms to, the ones in the cab. So, ideally a half power mod would turn off 2 tubes and switch it down to 8 ohms right ? Sounds to complicated now, oh well, its got a master, guess I really dont need a half power option.