This small transmission line subwoofer really hits beyond its weight! The driver is from Tang Band (W4-2089 4.5″ RBM Mini Flat Panel Subwoofer 4 Ohm). It is a really easy build, and would be an ideal companion in the trunk of a car or for a small desktop speaker setup.

Suggested amplifier power: 80W (RMS)
High-pass filter: 35Hz, Low-pass filter: 160Hz

SketchUp files and a Parts List are available on my Patreon page (http://www.patreon.com/soundblab) or later in the beginning of 2020 to YouTube membership via the Community tab on my channel (https://www.youtube.com/soundblab/community).

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