Simulates the interaction between the woofer and the cabinet air column.
Without a way to calculate these interactions simultaneously, early DIY builders spent countless hours packing, unpacking, and cutting wood to eliminate the notorious "one-note bass" or mid-bass harshness associated with poorly tuned lines. Who is Martin J. King?
Engineering Transmission Line Loudspeakers: The Legacy and Utility of Martin J. King’s Mathcad Worksheets martin j king mathcad worksheets
By combining rigorous academic acoustics with practical DIY construction techniques, M.J. King's worksheets transformed loudspeaker building from an art of trial-and-error into a predictable, highly sophisticated science. If you want to start modeling, let me know:
Enclosures that couple the driver's rear wave to a expanding horn profile for high-efficiency bass reinforcement. Simulates the interaction between the woofer and the
How specific amounts of polyester fiber or long-hair wool stuffing attenuate higher-frequency internal reflections.
As of recent years, Mathcad has evolved (from Mathsoft to PTC), and the community has shifted toward open-source platforms like or R . However, King’s original .xmcd and .mcdx files remain perfectly usable. : Accurately models straight
As software evolved, Mathcad changed its licensing and versions (transitioning to Mathcad Prime). This created a hurdle for users with legacy worksheets. However, the community has remained active in keeping King’s methodologies alive. For modern builders, using these worksheets often requires: An older version of Mathcad or a compatible viewer.
: Accurately models straight, tapered, or expanding transmission lines. Quarter Wave Theory