Thanks for this.
And you're right about the speakers not making much sound when only the bass is connected. The only reason I checked while listening separately is that I wasn't getting much bass at all.
The rear of these speakers has two fuses. Midrange and tweeter. There is no fuse for the bass.
The Marchand was something on my list, but again, was very expensive when I really don't know how it will perform in my system or how big a difference it will make. I also looked into Puritan Audio.
Those are costly options. I was going to go with a behringer and see if it makes a difference.
Thanks for sharing the pic. Those are interesting looking speakers, indeed.