How to make an circle hole in the mesh

Support Modeling
1

I’m begginer but I learn a lot of things in Blender, but there is something bug my.
I want to make an hole on cube and I don’t have idea how to do this. That will bi one woofer speaker but still it is only cube:mad:

2

Maybe this will do http://www.blendernation.com/tutorials/blender-3d-beginner-tutorial-a-die/

3

Here this is the perfect tut - its better than playing with plato :o
http://www.blendernewbies.com/tutorials/video/Cutting_a_Hole_in_your_Mesh.mov

4

thanx for the nice tut video…