Please explain why he shouldn't use solid core wire..Solid core wire will break after vibrations, it's meant to be installed in a home where it is never subjected to vibration. The wire will crack inside the sheathing. It will ohm out but you will get static and shorts through the speakers, use copper tube much stronger than copper wire, also mug more rigid and will actually hold the bends.When the solid core wire does finally break, you won't be able to tell, when you ohm it out it will read alright but you won't be able to get any current through the break in the wire.
Been there done that!!! Never again!!!
You make a good point! That's why I was going to make holding brakets for them so they couldn't move. I was thinking the more places I support the wire the less it can move and cause it to break. Just a thought! I've never ran solid core wire on a system! Thanks for the info!
Just my advise, use something with 5 or 6 strands doesn't have to be many but just make sure it's not one solid peice have had it fail in cars and in pipe coming from under a house into a fountain. Both same issue, wire reads fine ohms fine, can't put a load through it. When you use it as speaker wire it can create a huge amount of interference, and or hissing or just a random short which was happening to me in my first car.
I don't think you can hold it rigid enough inside a vehicle for it not to be an issue.
Look at the pinned bmw m3 build log (birrillium) some spelling like that... He used copper tube as speaker wires,you could cost them with clear heat shrink if you are worried about touching; it's much stronger than copper wire will hold the shape you want but it won't break like the solid core wire will.