Speaker base for IKEA table

Monitor speaker mount that goes above the desk's surface, so i can use more area of my desk.
The desk is from ikea and where the bracket mounts is, it's 3.5cm. My desk has 3.4cm at that point so you might add something in between to have tight fit on the desk. The monitor speakers are 14.5cm x 15.3cm but i think this can hold also other speakers