Reflector Audio Square 2

Greetings, friends!
Today, as promised all week, I'll tell you about the Reflector Audio Square 2 speakers. This phase-linear speaker looks unusual and sounds exceptionally accurate! Some viewers guessed correctly! There are 5 radiators here. But there were options: 4, and even 6! Thanks for being active, friends!

Around the perimeter, there are four 5-inch mid-bass drivers 5W430. The moving mass of each is only 8 grams. The nominal power of each is 80 watts. All together - 320 watts. For maximum playback accuracy and distortion minimization, Reflector Audio limits the power supply to 250 watts for the entire mid-bass quartet.

The voice coil has a diameter of 1 inch and is made of copper to ensure linearity and constant power. The speaker material is polypropylene. In other words, they are all-weather! But don't forget that the speakers are still studio-grade - for use indoors or at home. Ferrite magnet.
The hole in the middle for the subwoofer - commentators called the specially created and calculated horn for placing a high-performance tweeter. In Reflector Audio Square 2, the HF1440 driver is used, with a maximum power of 240 watts. It receives a maximum of 25 watts. So, even with a strong desire, it won't burn out.

Diaphragm material: ketone polymer. Diaphragm shape: Ring! Reflector Audio has abandoned the use of dome diaphragms due to uncontrollable distortions.

The ring diaphragm in HF1440 provides a flat frequency response. A serious power reserve, I remind you that at a power of 240 watts, only 25 watts are supplied to the tweeter, ensuring reliable and long-term operation of the radiator for an insanely long time.
And now, the question for the next week:
Is the Reflector Audio Square 2 a closed-box or a bass reflex speaker?
By the way, you can inspect, listen, and even touch the Reflector Audio Square 2 at the PremiumHIFI studio. 
That's all. May the power of sound be with you.