It isn't well known, until very recently, particularly after Andrew Robinson and Audioholics did reviews.
Over the few years, I tried horns (Klipsch Forte IVs), electrostatics (Martin Logan 13A), planars (Magnepan 1.7i), and dynamic (Focal 1038be). I had already switched to my current Denafrips Iris DDC, Pontus DAC, and Technics 1210GR turntable with Lyra Delos cart, Pro-ject TubeBox DS2 phono preamp, and Willsenton R8 amp. None of those speakers I mentioned satisfied me in terms of full-range, smooth sound. They were detailed but at the expense of a high-end slightly brighter than I like.
The Heco 1000, right out-of-the box, gave me what I had been searching for. It is accurate and extended without being in the least bright. I am Cuban and love the brassy music. The slightest brightness in a speaker can be very fatiguing. Instead of shaking your hips to the music you cover your ears and ask for mercy.
The Heco has balanced tonality second to no speaker I've heard recently. I literally can sit all night listening to all kinds of music, americana, bluegrass, blues, jazz, or classical. None of it is fatiguing. All good speaker traits the Heco 1000 has in spades. I hope that gives you a good feel for why I decided on them.