If you lower your expectations.. a Logitech speaker can be a poor man's blade
To be fair, any speakers in any room is a compromise. It's up to the end user to decide on where their priorities lie, and to design their system around it. Take a look at the $30000 speaker recommendation thread that's going on as an example...
For my space and my needs, having the subs under the mains works for me. I don't listen to music glued to one seat, and I enjoy music from all over my untreated open concept living space. Yes it's not the ideal sub position but floor space is a commodity.
No I don't think they will be the same as blades, but will get me most of the way there. SPL will be limited, but if I wanted concert level spl, I would have chosen different speakers.
All I asked for was where the ideal crossover is to minimize imd, and ihd, without disrupting the point source effect. I love the meta and just want to optimize them to let them reach their potential.