do i need a different wire for in-wall speakers or a regular speaker wire
If you are installing in-wall wire, look for wire with CL3 or in-wall insulation. The wire is not the issue, but the CL3 means the plastic insulation around the wire is fire-resistant and wont act like a fuse to spread a fire. Many fire codes require this. Some of the Carol brand from Home Depot is CL3 rated or buy a spool of 12 ga from PartsExpress.
You will best be served by wire that is properly shielded. There is specific wire designed to be installed in-wall, and that is what I would suggest for you to use for that application. . .
Regular speaker wire will work for in-wall speakers.
