W

Waterfall Plot (CSD)
Three-dimensional graph showing frequency response decay over time. Reveals resonances (ridges that persist). Also called Cumulative Spectral Decay. Measured with REW. Useful for identifying cabin modes and panel resonances. → See also: REW, Group Delay
Chapter 9.1

WinISD
Free subwoofer enclosure design software. Input T/S parameters, outputs box volume, port dimensions, predicted response. Alternative: BassBox Pro (commercial). → See also: Thiele-Small
Chapter 10.3

Wire Gauge
Wire thickness measurement (AWG system). Lower number = thicker. Power wire: 8 AWG (500W), 4 AWG (1000W), 0 AWG (2500W). Speaker wire: 16 AWG adequate for most. → See also: AWG, Voltage Drop
Chapter 2.2