If I understood your question .. I have an example since I hacked the wall before adding the tv panel so that I could run the wires.

I used PVC piping inside.

Here's a pic of the wall hacked

[attachmentid=3180906]

here's the final product.

[attachmentid=3180917]

here's another view from far with some furniture in.

[attachmentid=3180909]

Another way to run speaker wires is to conceal speaker walls in the wall plugged into speaker panel adaptors available in jalan pasar.

I heard that it is incorrect if your wiring pipe goes horizontally from bottom.
suppose to be horizontally and vertically from top ceiling.
Not sure how true it is.