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  WinSpeakerz  Introduction to Loudspeaker Design DATS V2 
Measure Audio Signals Design a Loudspeaker Enclosure Learn about Loudspeaker Design Measure Z and Driver Parameters

TrueRTA's audio spectrum analyzer software shows you a detailed picture of what you're hearing in real-time, that is, as it happens. All you need is a Windows PC with basic sound capability. The test instruments found in TrueRTA include:

Real Time Audio Analyzer
● Low Distortion Signal Generator
● Dual Trace Oscilloscope
● dB SPL, dBu and Crest Factor Meters

WinSpeakerz is a loudspeaker simulation program. This popular speaker simulator lets you propose various speaker
systems and then evaluate them in software before you cut wood or order expensive transducer components.

● Customize your Driver Library
● Box Calculators
● Crossover Calculators
Introduction to Loudspeaker Design is written for students, technicians, engineers and hobbyists seeking an overview of the technology of loudspeakers. Topics include:

● Loudspeaker Design Tradeoffs
● Spatial Loading
● Diffraction Loss
● Cavity Effect
● Enclosure Construction
DATS measures loudspeaker parameters or passive component values in just seconds and even includes our unique impedance based Rub and Buzz test.

Measure Speaker Parameters
Perform Rub and Buzz Testing
Measure R, C and L values
Generate Audio Waveforms
Starting at $39.95 $39.95 $24.95 $99.88

Learn more about TrueRTA

Learn more about WinSpeakerz Learn more about
Introduction to Loudspeaker Design
Learn more about DATS

 TrueRTA Audio Spectrum Analyzer for Windows
About TrueRTA TrueRTA Selection Guide TrueRTA FAQs TrueRTA Support TrueRTA Downloads

Create your own audio measurement system starting with TrueRTA software and your Windows PC. Then add a measurement microphone and USB interface and you have a full audio/acoustic test setup. Start with the free level 1 edition which provides a 1 octave spectrum analyzer, a dual trace oscilloscope and a signal generator. Level 1 never expires. Once you get to see the power of the software and how easily you become productive with it you will want to upgrade to a higher level with greater resolution. More...

Brent Butterworth writing for Sound and Vision Magazine, Jan 2011 :
 "While lots of audio measurement software applications exist for the PC, the one that seems to have captured the hearts of engineers and enthusiasts is TrueRTA, available at trueaudio.com. Most speaker engineers I know keep a copy on their computers."

Starting at $39.95


 WinSpeakerz Loudspeaker Design Software "The Speaker Design Toolbox"
About WinSpeakerz WinSpeakerz Support WinSpeakerz_Demo WinSpeakerz Drivers


WinSpeakerz is our loudspeaker simulation program
for Windows XP, 7 and 8. Use this app to simulate the performance of any loudspeaker system you propose. Only begin building after verifying and polishing your new speaker in the simulator.

The software includes a driver database with over 1000 drivers that you can expand to include your own favorite or proprietary drivers. More...

Click here to download the WinSpeakerz Free Demo
(Windows XP, 7 and 8 compatible)

Only $39.95!


 Introduction to Loudspeaker Design, 2nd Edition by John L. Murphy

Introduction to Loudspeaker Design is written for hobbyists, students, technicians and engineers seeking an overview of the technology of loudspeakers. Starting with a brief history of audio developments the book begins by introducing the concepts of frequency, pitch and loudness and proceeds to develop the idea of a loudspeaker as a system. 

The book is now in its second edition and covers such topics as loudspeaker design tradeoffs, spatial loading, diffraction loss, cavity effect and enclosure construction. A complete chapter is devoted to the subject of crossover design. The appendices contain technical references, design aids and a chart depicting 18 different loudspeaker enclosure types. More...

Chapter Headings include: Get it at Amazon
Kindle Edition for $9.99!
Paperback Edition for $24.95

reddot.gif (829 bytes) Audio Basics
reddot.gif (829 bytes) Loudspeaker Basics
reddot.gif (829 bytes) Speaker Response Functions
reddot.gif (829 bytes) Advanced Loudspeaker Topics
reddot.gif (829 bytes) Enclosure Design

reddot.gif (829 bytes) Crossover Design
reddot.gif (829 bytes) Driver Parameter Measurement
reddot.gif (829 bytes) Loudspeaker Simulation
reddot.gif (829 bytes) References and Design Aids
reddot.gif (829 bytes) Glossaries and Box Types

Click here to learn more!


 DATS V2, the Dayton Audio Test System


DATS is an impedance measurement system with the ability to measure loudspeaker parameters in just seconds.  DATS V2 is the latest edition of the Dayton Audio Test System with a new generation of hardware. The original DATS set new standards for speed, accuracy and precision in audio impedance testing. Now DATS V2 expands and improves everything users have come to love about DATS. DATS was designed by John L. Murphy in collaboration with Dayton Audio   

View the DATS Brochure 

Buy DATS at Parts Express

DATS Software Upgrades

$99.88 at Parts Express


Audio Books

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From True Audio

Speaker Builder magazine said: "In conclusion, I cannot imagine a better "Introduction to Loudspeaker Design" than this book."  Click to read more ...

'Introduction to Loudspeaker Design"
by John L Murphy

The New 2nd Edition is here! The book for hobbyists, technicians, and engineers seeking an overview of the technology of loudspeakers.

The perfect companion to our speaker design software!

Get it at Amazon
Kindle Edition for $9.99!
Paperback Edition for $24.95


Order ILD Now!
Read the full book review
Read About ILD!

True Audio, in Association with 
Click here to visit the Audio Engineering Bookstore ...
Invites You to Visit
The Audio Engineering Bookstore

Lancaster's Active Filter Cookbook
by Don Lancaster

Loudspeaker Design Cookbook
by Vance Dickason

to the Bookstore

Download  our Real Time Analyzer!
TrueRTA Level 1

Download a Demo of our WinSpeakerz software and see for yourself what loudspeaker design is all about!

Get the WinSpeakerz demo and Demo Manual!
For Windows XP, Vista and Windows 7/8 - Never Expires!


Free Stuff

Murphy on Tubes vs. Solid-State

Echo, Reverb and Time Delay Effects
John Murphy's Posts on Audio Topics
Speaker Topics
Overview of  Crossovers
Overview of  Crossovers-II
Linkwitz-Riley Crossovers
Neutralizing L(e) with a Zobel
Design a Linkwitz Transform Circuit

Audio Links

  Speaker Driver Manufacturers
  Speaker Component Sources
  Speaker System Manufacturers
Speaker Suppliers
Speaker Reconing
Audio Search Engines
Other Audio Sites
Woodworking Sites

DIY Audio Projects




Customer Comments About John L Murphy

Windows software


Book - ILD

Amazon Book Store

"I use WinSpeakerz frequently. It's extremely easy to use, fast, accurate and helpful. It provides a quick way of trying many "what if" scenarios. Any speaker designer from beginner to pro will find WinSpeakerz to offer exceptional value. Highly recommended!"

Mike Dzurko,
Audio Concepts Inc.

What Our Customers Say About TrueRTA!

"I find this quite an amazing package. To put this amount of test gear together in earlier days would have cost me tens of thousands of dollars. Very nicely designed, very user friendly, and tells me all I need to know in a quick and efficient way. I take my hat off to your designer !! - Arthur"

John is the designer of:

and the author of:
'Introduction to Loudspeaker Design'
Read about John's extensive background in
Physics and Audio!


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WinSpeakerz Drivers

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True Audio's Bass List Page

Press Information Page

Learn to use TrueRTA at the Audio Visual Science Forum:

Questions about Sound Cards, Microphones or Calibration?

Click here:

Andersonville Tennessee USA

Phone: 865-494-3388


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