A speaker's wire plugs are generally red (positive) and black (negative). Red wires connect to red plugs, and black wires connect to black plugs. If a speaker's wires contain different colors, the wires should be matched to their plugs by their positive and negative symbols. Full Answer >.
Finding wall studs. Wall studs in modern homes are spaced 16 inches on center -- that is thedistance from the center of one wall stud to the center of the next is 16inches. In older homes, studs may be 24 inches apart, or spaced irregularly.
When you get to those marks on the plate, write inside of the space what goes there just as you will do for cripple-studs that fall on-spacing. Study the Long Garage Wall Framing diagram above and you will get the idea of what falls on-spacing and off-spacing, all of which have to be marked on the top and sole plates.