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.
For years there has been confusion in the field about whether holes can be safely drilled into or through glulam beams. It's true, you can damage a beam to the point of reducing its structural integrity by improperly drilling holes in the wrong places. Hole spacing: The minimum clear spacing between adjacent holes, as measured between the nearest edge of the holes, should be 8 hole diameters based on the largest diameter of any adjacent hole in the beam. 2  Number of holes: The maximum number of holes should not exceed 1 hole per every 5 feet of beam length.