” The second of three Pioneer S-IW in-wall speakers, the Pioneer S-IW631L is a tradeoff from the S-IW531L in that it doesn’t feature dual woofers, but it does feature a larger 6-1/2” (versus 5-1/4”) Polypropylene woofer and one 1” pivoting soft dome tweeter. In addition, the S-IW631-LR adds along a humidity-resistant dual voice coil design that provides single-point stereo performance in all sorts of environments, not to mention a dependable 8-Ohm impedance rating for higher-quality amplification with single and multi zone applications. The S-IW631-LR also features internal Thermal Resetting Protection Circuitry that offers greater reliability and reduces the need for frequent visits to replace damaged speakers. Plus, the S-IW631-LR 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-IW631L is designed to fit within standard 16” stud spacing. The Pioneer S-IW631L retails as a pair (two speakers) for $375.00 (same as its peer) and comes with a 1 year limited warranty.