There are a couple of ways you can try to pack your PC speakers in a non-original box. One way is to wrap the speakers in pieces of wrapping paper or sheets of bubble wrap. This will help to immobilize the components and make them less likely to move around during shipping. Another option is to simply place the speakers into a large container, such as an old cardboard box, and then seal the container with packing tape. Make sure to label the box with FRAGILE and HANDLE WITH CARE so that you don't accidentally damage the speaker when moving it later on. Either way, it's important to take note of these precautions in order to keep your PC speakers in good condition during transport.