But as a perfectionistic tweaker, I always want more. You can improve the speaker by using better baffling, wiring, xover parts, isolation and diffraction control. I would use something like bamboo plywood for the front baffle and make the wing and base at least 1.5 inches thick.
Making the baffle that thick would likely have a negative effect on the 3" drivers. Even with a 3/4" baffle they need a pretty good sized radius on them or the through hole loads the driver. There is just not a lot of space between the driver and the through hole.
And they just don't have enough moving force to put any energy into the baffle. Especially in an open baffle. They just don't play down low enough to move much to begin with.
Plus the 3/4" baffle is the perfect thickness for the tweeter wave guide.
Felting around the front opening of the waveguide will give better imaging.
Not much area there and the wave guide pretty much kills any surface reflection issues. And putting felt in the wave guide (I tried that) has a negative effect on the response. I don't think there is anything there to gain from it.
Isolating the x-over from the panel will give lower distortion.
If the drivers had any real moving force or transmitted much to the baffle then there could be something there, but they don't. And they the crossover (if mounted right behind the drivers) is not subject to any box pressure changes since there is no box. Not much there to gain, but feel free.
The Erse coils are good but I am now using 12 gauge Jantzen copper foil in wax coils on my midrange and the difference is really great. Dynamics and detail galore. I like the 16 gauge Jantzen for the tweeter.
Actually there is a reason that those inductors are so inexpensive even after shipping from Europe, and with a 5% duty added, brokerage fees, and a dealer mark up from PE. They are made in China with recycled Copper. They are on average only 94 to 95% Copper and the rest is just recycled waste.
It also explains why they sound so bad compared to the Erse inductors that are four 9's pure Copper and made in the USA.
If you want to step up to a foil inductor then the Erse or Alpha Core foil are top notch.
So, I'd stick with the Erse inductors myself.
Taking it to another level would be to tri-amp the system. I am designing a 2 way line level x-over that could be used with the wedgies and many other drivers/speakers. It will have options to use it as a 6, 12, 18 or 24 db per octave xover (12 is what is in the Wedgies). It will use DC coupled fet buffers and use the best caps and resistors money can buy. Shunt regulated power supply powered by 130 watt transformer. No switches or pots in the signal path. This x-over should be the most transparent line level x-over ever developed (in theory, at least). Removing the coil from the midranges (and all the other parts) will give the speaker even more dynamics, purity and transparency. I should have it ready for shipping in about 3-4 months. But even stock the Wedgie must be amazing as its design is light years ahead of most speakers.
I don't think the 3" LGK drivers create a big enough back EMF to have much effect on the tweeter. But feel free to give it a try. Separating the 200Hz and down range to a different amp is a pretty big deal though.
Let me know when you're ready and I'll sell you a kit so you can start messing with it.
