Woofer Box and Circuit Designer - The most accurate Sealed, Vented, and Passive Radiator modeling tool available - Complete with amplifier modeling and the ability to include room and baffle effects in the response
How to Design Loudspeakers without Performing Measurements
"Simple Loudspeaker Design" - By Dave Dal Farra:
Presentation / Overview of how to design loudspeakers without performing measurements. Get it HERE
Zipped directory containing all the necessary software applications and demo files. Get it HERE
Software By Charlie Laub:
Active Crossover Designer (ACD)- A set of tools for designing active loudspeaker crossovers using a series of linked Excel spreadsheets. Complete control of transfer function using pole and zero notation. Generates "advanced biquad" coefficients for the MiniDSP crossovers. Core tools are extensible via extensions.
Power Supply Capability and Design - a tool for designing linear unregulated power supplied used to power class-AB power amplifiers. Includes a model of the transformer that accounts for voltage sag with increasing current draw based on Antek AN series transformers. Choose capacitor ripple voltage, nominal speaker load, and number of channels and see the power potential that the supply can support. Great for making choices about transformer VA rating, total capacitance used, etc.