Adrian this is my version of your new amp
The 3210, and to achieve a 4 ohm load, I plug it into 2 8 ohm MG cabs.
And a big healthy congratulations on your new amp score.
Cheers
Mitch
With my DSL40CR I can slave them either way round with 4CM stereo effects and the results are awesome.
SS into tube or tube into SS, it's all just Marshall goodness