How does the sub you made measure for distortion vs the standard sub box shaped enclosure.
Building Resonance Free Subwoofers
Rotator cuff surgery has left me with enough disability time to complete the picture diary of the construction of MS Tool and Woodcraft Model 4 passive subwoofers which many have asked for. Here it is https://imgur.com/a/dOTF3cS
Feel free to ask any questions. It will help fight off the boredom.