Martin J King Mathcad Worksheets [480p]

King developed original algorithms to simulate the effect of fiber stuffing (such as polyfill or long-hair wool). The worksheets allowed users to vary the density and location of the stuffing, showing exactly how it suppresses unwanted higher-frequency resonances while lowering the speed of sound inside the enclosure.

Uses wave propagation equations to model how standing waves inside the enclosure produce bass from the port.

Many of the classic sheets were written for Mathcad 11, 14, or 15. martin j king mathcad worksheets

Generates electrical impedance plots to anticipate amplifier matching issues. Core Worksheets in the MJK Suite

The worksheet calculates the acoustic output. King developed original algorithms to simulate the effect

The sheets handle straight, expanding (horn), or contracting (tapered) columns of air.

Before King’s worksheets, building a transmission line speaker involved guesswork, intuition, and "golden ratio" formulas. These older methods often resulted in boomy bass or severe mid-bass cancellation. King’s worksheets introduced several paradigm shifts: Many of the classic sheets were written for

Forums like diyaudio.com often have users who possess and share these specialized files.

Damping material placement in a transmission line is critical. The worksheets allow you to define the density and placement of stuffing, which directly affects the smoothness of the response.

Martin J. King retired his active support and distribution of the worksheets via Quarter-Wave.com, making original, authorized copies difficult to obtain for new hobbyists. Additionally, older worksheets require specific legacy versions of PTC Mathcad, which can be expensive or difficult to run on modern operating systems.