Wasn’t it said that the USP of the 8361 was high SPL? They were made for people who NEED higher SPL and at the expense of bass extension.
The assumption being someone who opts for this model needs the extra SPL enough to opt for this bigger and more expensive model for that purpose and also would be able to add a big sub or two to fill out the bass and get their SPL with bass extension.
I suppose one could argue all the ones need a sub but the 8361 especially needs one to keep up with its extra SPL output. That was the reason for its existence. Extra SPL output.