Yeah, they're worth it.
As @karl_desch said, "You just need to know the input impedance of your amplifier. The high pass filters are dip switch controlled and super easy to adjust. The only time you need a volt meter is when you don’t know the input impedance of your amp."
The other huge benefits of any of the speakers that utilize the high pass filters are:
1) You're taking much of the difficult task driving the low bass off your regular amp and shifting that burden to the powerful plate amps inside the speakers, designed specifically for that task. This opens up the opportunity to get great results with medium powered amps(e.g. ~75w).
2) You get 11 band ANALOG bass EQ adjustment that will allow optimal placement in most any room without resorting to DSP.
IMHO, these two benefits are HUGE!
One of the benefits of the new EVO model is that it can work well with most integrated amps since you don't need to insert the high pass filters between power and preamp sections. Ayre, Aesthetix and a couple of others can build in high pass filters, but many other integrated amps aren't going to be an option with Quatro CTs, 5A variants, etc., but those amps would be fine with EVOs. Cheers,
Spencer