Pretty Ugly but Sounds Amazing! - Designing A 4-Way Open Baffle Speaker

I settled on 150Hz, 520Hz and 3500Hz for now. This is all very, very preliminary and things will change.
For example, the new 8" is a Dayton Audio DC200-8 and I should have those early next week. They are 87db and the ones I'm using now are 92db, so a much better match for the other three drivers.
My intention from the start was to design and build a passive crossover for these, but digital has too many advantages these days in a system that's setup for the long term. It also has the flexibility to be tweaked are reconfigured without changing components. Or used for an entirely different speaker if I get tired of these.
One problem is that I don't have enough amplifier channels in my 6 channel amp for a pair of 4-ways. I do have enough when I include the two receivers I have. The Yamaha is a 7.1, so I can probably use 4 of its channels without much power supply sag. All off the drivers are 8 ohms, so that helps.
Ultimately I want to build an 8 or 10 channel amp with a minimum of 100 watts for each channel. And I mean from scratch - design the amp circuit, the pcb's and build it all from the ground up. I already have the transformer for such an amp, a monster toroid 1200VA 50-0-50. I also have a case I started making over 10 years ago that can easily fit 10 amplifier channels and a big power supply.
So in other words, there's some interesting stuff ahead if you are into that kind of thing.
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