Preface
I Using Scimpy
Overview
Usage
Impedance Testing
Hardware Connections
How to Use the Software
Interpreting Data
II Theory
Introduction
Impedance
Electrical Impedance
Impedance Matching
Why Impedance Matching Doesn't Matter Any More
Why Impedance Matching Still Matters
Why Impedance Measurements Still Matter
Measuring Impedance
Crossover Circuits and Impedance
How Do Loudspeakers Work?
Electrical Model
Mechanical Model
Acoustical Model
Combined Model
Loudspeaker Box Design
Speaker with an Infinite Baffle
Sealed Box Enclosure
Vented/Ported/Bass-Reflex Enclosures
Fourth Order Butterworth Filter (B4) Qts=0.383
Fourth Order Chebyschev (C4) Qts>0.383
Third Order Quasi-Butterworth (QB3) Qts<0.383
Graphical Tool for Enclosure Design
Closed or Vented Box?
Group Delay?
Excursion and Power ratings?
Efficiency
Sound Power Level (SWL) and Sound Pressure Level (SPL)
Including effects of loss?
Computer Design:
Two-way Speaker Design
random stuff
excursion? Max power?
QB3, C4 Alignment Code