” The first of three Pioneer S-IW in-wall speakers, the Pioneer S-IW531L is outfitted with dual 5-1/4” Polypropylene woofers and one 1” pivoting soft dome tweeter. In addition, the S-IW531L features internal Thermal Resetting Protection Circuitry that offers greater reliability and reduces the need for frequent visits to replace damaged speakers. The S-IW531L also offers a 100w power handling and 3-position treble contour controls to customize high frequency outputs to an individual’s specific tastes. It should also be noted that the S-IW531L is designed to fit within standard 16” stud spacing. The Pioneer S-IW531L retails for $375.00 and comes with a 1 year limited warranty.