PC speakers

I had an old PC speakers I did not use.

When I knew Jim Frize's "yout scoop" speakers I decided to make this rework to reuse them
The sound seems to be improved, but in any case they look much cooler than the old ones

18/06/12
SPEAKER_1_v2: I've made some changes to improve printability
SPEAKER_1_v2_180: Also added lateral walls to turn it around