I think I built these in 2014. They’re a copy of the “Leuk & simpel hoorn reflex monitortje met FRS8” project by meiborg on zelfbouwaudio.nl forum. I first wanted to modify it into a triangular shape because of my room at the time, but decided against it because I didn’t have the woodworking tools or skills required.
They use a Visaton FRS8 full range driver, and a horn reflex port to bring the response down to about 100Hz. I like how they sound, I even built someone a second set as a gift.
