Good for small and lightweight satellites. I use two satellites with 2 neodymium 8-inch speakers each (lightweight). For heavier and larger speakers, it definitely becomes unstable, especially if you adjust the distance between them too much. For what I use, it's super okay value for money.
At a first test with two 9 kg speakers (Ev ZX1), they are at the limit of stability. Honestly, I don't think they can hold two 20 kg speakers. Maybe if it's a solid iron stand well welded... in the ground. The material and workmanship are fine. So, I'm waiting to see how practical they are at an event suitable for those speakers to use this extension.
