Martin J King Mathcad - Worksheets _top_

Mathcad

Martin J. King's (MJK) Mathcad worksheets are a highly regarded set of analytical tools developed in the early 2000s for designing quarter-wavelength loudspeaker enclosures, such as transmission lines and mass-loaded transmission lines (MLTL). They are designed to model speaker performance through a combination of -based simulation and speaker driver Thiele/Small parameters . Key Aspects of MJK Mathcad Worksheets

These worksheets allow designers to perform "what-if" analyses to predict how changes in enclosure geometry—like taper ratio, length, or stuffing density—impact the speaker's frequency response and impedance. www.coolcat.dk Key Capabilities Transmission Line (TL) Analysis martin j king mathcad worksheets

Assuming you have obtained a legitimate worksheet file (e.g., Classic_TL_4_0.xmcd ), here is how to extract value from it. Mathcad Martin J

• Quarter-Wave Transmission Lines (QLW): King’s primary focus. These are complex enclosures where the length of the line interacts with the driver to produce deep bass and smooth roll-off.
• Open Baffle Designs: Modeling the dipole radiation patterns of speakers without enclosures.
• Horns and TQWTs: Tapered Quarter-Wave Tubes and other hybrid designs.
• Driver Parameter Calculation: Tools for deriving Thiele/Small parameters from impedance measurements.

• MJK often includes a "Table" section where you can define multiple line shapes (tapers).
• You will see variables like L (Length), So (Start Area), SL (End Area).
• Try changing So and SL. If So > Sl, you have a tapered line (most common). If So = Sl, it is a straight pipe.