This is a somewhat in depth white paper that describes how and why Sausalito Audio collects and presents loudspeaker acoustical data. If you read nothing else on the Sausalito Audio website, read this.

 

Click here to view and/or download the pdf > Interpreting Spinorama Charts

This engineering report for the Grimani Systems top-of-the-line Alpha loudspeaker has a complete set of charts characterizing the acoustical performance of this high SPL CSA cinema loudspeaker.

 

Click here to view and/or download the pdf > GS Alpha Charts

This 6” two-way speaker uses a conventional 1” dome tweeter and is intended to be a concept prototype for a consumer bookshelf speaker or professional studio monitor. The CSA waveguide is modified in this embodiment for aesthetic purposes.

 

Click here to view and/or download the pdf > SA 2 Way Prototype 1 Charts

This engineering report is for the very first CSA loudspeaker ever built.  It has a complete set of charts characterizing the acoustical performance of this high SPL CSA sound reinforcement loudspeaker.

 

Click here to view and/or download the pdf > SA PA Proto 1 Charts

This engineering report for the JBL 708P loudspeaker has a complete set of charts characterizing the acoustical performance of this high-end studio monitor. If I couldn’t use my own CSA speakers, I’d buy these.

Click here to view and/or download the pdf > JBL 708P Charts

I thought it would be interesting to run a full set of measurements on the 1” dome tweeter that is used in the 6” two-way prototypes.

Click here to view and/or download the pdf > Audax TWO25 Charts -1

This is Sausalito Audio’s first CSA waveguide with a more conventional form factor.  While the internal geometry is the same as other CSAs, the mouth of the waveguide has been modified so that it can mount on a flat surface — like a more conventional waveguide.  While we were thinking of in-wall speaker applications, this could certainly be used in other speakers.

Click here to view and/or download the pdf > In-Wall CSA Rev 9 Charts

This prototype uses drivers appropriate for sound reinforcement applications.  It is a 2 1/2 way concept speaker designed to show what is possible from a portable, light duty, relatively inexpensive sound reinforcement speaker.

Click here to view and/or download the pdf > Small PA Concept Charts

The Home Pod is Apple’s smart speaker offering.  It’s an impressive bit of engineering.  This report considers only how the unit behaves in free space. Apple claims that the onboard processing can detect a nearby boundary and adjust the bass response accordingly. The Home Pod has an up-mixer and apparently can make use of nearby walls to provide spatial enhancement.

Click here to view and/or download the pdf > Apple Home Pod Charts

The Sonos Play One is a compact, Wi-Fi enabled mini-speaker.  It is considered one of the better sounding speakers in its class, and the measurements show why.

Click here to view and/or download the pdf > Sonos Play One Charts

This little speaker uses a 3” woofer and 3/4” tweeter.  It was developed to show what is possible with the CSA in a computer audio or voice assistant type speaker product.  With a change of form factor, these drivers could be used to achieve similar performance in a sound bar product.

Click here to view and/or download the pdf > Mini CSA 2 Concept Charts