K&M 24185 Universal Wall Holder BK

cons - The screw has not enough power to hold the speakers in its position as it should. It is tight but sometimes the speaker rotates on its own. I guess the KRK wall can hold much more than this one.
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(Tried with Genelec M30, Focal CMS 40 which are not big speakers at all)

The build quality is good, but the way the pivoting bracket is hold in place using a ball joint is not strong enough to ensure the speaker (6.5 kg) is held in position over time: the speaker tend to sway down over time.