Staple Gun and Speaker Cables

They make special staples (and staple guns) for stapling wire. Personally I would use something like 3M Command adhesive hooks since they are not permanent.

I'm not sure if I'm about the suggest the same thing as jelloslug but they make these half-circle wire holders with 2 small nails on either side so that you can hold the wires in place without potentially ruining them. You just nail in the small nails on either side and it very snugly holds whatever wire you put in the semi-circle part.

after fastening the wire, how about adding foam, crown molding over top, completely hiding the wire?

How about a cable raceway? Might look a little better than staples, and not as difficult to install as crown. Plus you can easily change out or add cables if necessary.

the foam crown molding, you glue in place, and use ready made corners for joining.. pretty easy

Which has to be finished with a couple coats of mud, primer, then paint. Plus im sure its not recommended for his apartment complex.

I think the cable raceways are easiest.

it comes pre painted, all you need is caulk the gaps, which will more than likely be there, but sure, while raceway is easier, crown molding has a higher wife approval factor

I'd be curious if WAF is even applicable in this situation...the OP mentioned a staple gun as the first option...

Granted crown woud look much better, I just don't see it as being a good solution for rental property.

These are what I'm talking about:
http://solutions.3m.com/wps/portal/3...ts/cord_mngmt/

They are completely removable.

I know Home Depot has the regular Command hooks but I'm not sure about the wire organizers. Amazon has the cord organizers. Your subwoofer wire should be just fine as long as you are not running it together with a power cord.

In one of my first apartments I lightly tacked the speaker cable to the bottom and top of the corners in the dining room. I then used white caulking, which matched the paint, to completely cover the speaker wires. After the caulking was dry I stripped the wires and hung the speakers. I never had a single person comment to me that they could see the wire. For the most part it was totally hidden unless you really focused on the corner of the room. I imagine you could use the same method to run cable across the top of the baseboard and around door frames too. The best thing was when we moved I simply pulled the cable from the top and peeled it away from the wall with all the caulking attached to it. The apartment complex gave us all of our deposit back, which was the main reason I didn't want to damage any of the walls. Good luck with whatever approach you take.