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.
To restate the strength conclusions, 2x6 studs are great at 24-inch spacing, plenty strong even up to 10 feet long, supporting several stories. However, you have to be careful with 2x4s â they can make it at 24 inches but with restrictions.