Figure 7. An example of 
unobstructed wall space for
speaker wiring.
When you don’t have access above or below the wall, try to estimate the existing wire and pipe locations from known positions of electrical outlets and plumbed fixtures on both sides of the wall. Take a look at the outside of your house too – sometimes conduit, vents, or drainpipe will provide useful visible clues. Choose the route with the fewest potential obstacles.
If the home is built on a slab, or a speaker wire route is planned between two finished floors, look for baseboards that could be removed for wire placement. Doorjambs can also be removed and often have enough space for speaker wire all the way around the door, as shown in Figure 8.
Figure 8. Running speaker wire between a wall and a removed doorjamb. Nail plates are also installed to protect the wire when the doorjamb is replaced.
OTHER POSSIBLE SPEAKER WIRE ROUTES INCLUDE:
•Under-the-carpet runs using flat speaker wires.
•Heating and air conditioning vents used as wire raceways for
NOTE: CHECK YOUR LOCAL BUILDING CODES, SINCE SOME MUNICIPALITIES REQUIRE CONDUIT.
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