My love for high-end audio was born from these guys back in the 70's. As a child and teen, my bar for what audio should sound like came from our home system with Epicure 20's. I didn't know anyone with a home stereo that could even remotely compare. The Epicures were like the Ohm Walsh of the day, designed to be placed flat against the wall and offering a surreal image for its time. When the drivers deteriorated in the early 2000's, my Dad removed them and sent them to Human Speakers to be restored. They billed the credit card immediately, then went silent for over 6 months. We were thinking we had been scammed. Finally, they shipped out the restored drivers. When we got them, we couldn't believe that our once pristine driver baskets were now covered in rust! But at least they did sound as good as when they were new, so we were back in business at least. My Dad is still using them to this day.
I think it's important to note that this design was created before the Linkwitz-Riley crossover had been invented. That's why they still tout the advantages of the simplicity of their crossover. In those days, a simpler crossover was better! But I don't believe it holds up in modern times. If you want a better version of the Epi sound, just listen to some of the higher end ADS speakers, for instance. Using L-R crossovers, they are definitely an upgrade, with a similar sound signature to the Epi's, but better.
As someone who comes from a background of listening to the Epi sound signature, when I bought my own home, I got my hands on some ADS L-810's and thought they were the perfect next step from the speakers I had grown up with. But after going to Rocky Mountain Audio Fest for a few years, I knew I wanted something that sounded more like modern audiophile. So I recently upgraded my system using some of the most maligned speakers on this forum: Elac Unifi 2 bookshelves! That Ohm-Walsh-like imaging that I had grown up with, was now taken to a completely new level, courtesy of the Elac speakers, a home-made sub, and some DSP/EQ. My opinion then, is that the Epi sound signature is no longer relevant today, except as a museum piece.