We have a DB sub and a mackie srm350, this pole works perfectly and can put the mackie at a good height (well above head height if needed). The bottom of the pole is tapered so it can be fitted into the sub securely and the top has a rubber end to the speaker sits nicely on top.
The locking mech is very sturdy. One knob to adjust where the pin goes in and another to lock it in place. All very well made, and a great price on Thomann!
I would highly recommend all K&M stands for their quality and durability.
The good thing on this distance pole is that there it has a build in 'pin' to secure the distance you've selected. No hazzel with a pin attached to a rope or chain. Just pull the button and release it when you reached the desired height. The additional button is to fixate the position even more (friction) And as always with K&M: it looks good.