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44 pages in the site index

Computer Audio

Computer Audio

After many years of building passive crossovers I knew there had to be a better solution. 15 years ago, enter the EV Dx34 DSP crossover. Dialing in a crossover with this unit…

Contact

Contact

Original designs, measurements, and resources from RobsanDIY.

Projects

Dipole Sketches

Here are some dipole ideas that have been rattling around in my head for a while.

Projects

Heritage Dipole

I have been wanting to build a dipole loudspeaker for a long time. There were two articles in Speaker builder that intrigued me a long time ago, one by Michael Allen titled…

About

Intro

Welcome! The objective of this site is to share what I’ve learned from over 25 years of building loudspeakers. I built my first pair of loudspeakers when I was 14. I pulled a…

Driver tests

BMS 5S117-8

Burst Decay Sonogram, 40dB Dynamic Range

Driver tests

CSS VWR126X

Burst Decay Sonogram, 40dB Dynamic Range

Driver tests

Mid-Bass Tests

The hybrid dipole project requires a small, approximately 4”-5", mid bass driver. After many tests I’ve narrowed it down to a few contenders. Here are the test results thus far:

Driver tests

Seas MCA12RC

Burst Decay Sonogram, 40dB Dynamic Range

Reference

Phono Tests

Phono preamp tests using Right Mark Audio Analyzer (RMAA). Onkyo P-308 47K MM, Echo2 w/ RIAA DSP, and iFI iPhono

Software

DroidMix5

CueMix5 is a program used to control the MOTU 828 Gen2 and UltraLite-mk5. Currently it only works with MacOS, IOS, and Windows, so I created a version for Android called…

Software

Tone Burst

There are generally two types of distortion that loudspeakers produce, time and spectrum distortion. Time and frequency distortions can be directly related to each other, but…

Software

Programs

Toneburst is a free program I created to generate and analyze stepped sine bursts.

Driver tests

Speaker Tests

Index of the 21 available driver tests. Open a test page for measurement conditions, a plot for full resolution, or the original data files where available.

Reference

Reference

Technical notes, audio measurement resources, and downloadable test signals.

Reference

Test Signals

There are generally two types of distortion that loudspeakers produce, time and spectrum distortion. Time and frequency distortions can be directly related to each other, but…

Driver tests

Tweeter Tests

Unless otherwise noted, these tests are taken in the near field at 85dB@1M.

Projects

T-Pole

Preliminary T-Pole Model

Projects

T-Pole Sub

This design is based on a article Nelson Pass wrote about a slot loaded open baffle speaker. Mr. Pass states that the genesis of his slot loaded open baffle woofer cabinet came…

Driver tests

Acoustic Elegance TD12S

The original announcement is preserved in the notebook. The other available woofer measurements can be found below.

Driver tests

Woofer Tests

Unless otherwise noted, these tests are taken in the near field at 85dB.

Updates

Notebook & updates

Free software I created based on the research of Smoke Trails BBQ. It calculates how much time it will take to cook and render the collagen of a brisket.

Projects

Speaker projects

Design notes, cabinet drawings, construction photographs, and measurements. Each entry links to the original project documentation.

Reference

Perception

Original designs, measurements, and resources from RobsanDIY.