I had a look at the other 'design' SB Acoustic TMM, and I'm not happy with the xover schematic. The way it's wired will place the 2 resistors and shunt coil on the tweeter circuit directly across the amplifier terminals in series. This is something that could cause a fire under higher outputs, and requires heavy heatsinking and larger higher power resistors. The fact that the designer did this is short sighted and uninformed about how speakers, components, and amplifiers act in cases as these.
One of the rules in speaker schematic design should be to not ever bypass the tweeter's first series capacitor, in 2nd order electrical circuits or higher, unless special allowances are made. The resistors must be at least 25W, mounted on a heatsink, and also be external to the cabinet for adequate air flow as well as avoiding contact with damping materials.
If you have a series resistor before the xover, then it can be bypassed with a cap so long as there is another cap in series without a resistor across it.
Why this is a problem? Bass frequencies are blocked in Tweeter filters by capacitors. If there is no block of lower frequencies then full amplifier bandwidth can be fed through a circuit. This is why an Lpad is after the xover to limit bandwidth. The amplifier is just supplying the power to the load presented.
In that schematic, you have a coil and 8 ohms across the amplifier. What do dummy loads do when testing amps? THEY GET HOT! Without the capacitor to limit the bandwidth, your house and all of its belongings could be destroyed in the process.
All of you builders and both up-and-coming and experienced designers should be made very aware of this. Please do not do this.
EDIT: I would also like to add that it can also increase HD in the tweeter or mid by allowing the bass range to pass through the tweeter if this is a 2nd order electrical filter. Even if minutely passed or at an attenuated level, this is bypassing the highpass that is cleaning and protecting the driver in use. Likely a case for some large IMD too.
I've even seen someone use a resistor across BOTH caps in a 3rd order electrical network. It's dangerous to both user and driver, and I can't understand why it would be viewed as safe or okay.
The 'benefit' as this looks in sim is not worth the hassle or caveats.