Phase Wavelengths: The End Fire Cardioid Array made visible

The end fire array is one of the most talked about, even if not the most often implemented of the cardioid subwoofer arrays. It can be a challenge to wrap our heads around how we get the speakers to play leap-frog in the forward direction and … [Continue reading]

Phase Wavelengths Intro

So I was getting reasdy for my seminar here in Mexico city. About an hour before and I find that the graphics were mislabeled. Particularly problem was the one that had the wrong autocad backrground - the acoustical cancelled where the phase lines … [Continue reading]

Subwoofer Delay Taper (Update 1)

Here is a quick preview of my next post.  These plots contain concentric circles. Each represents a wavelength traveled from the speaker at 125 Hz (2.73 meters). The first one shows 7 speakers spaced at 1/2 wavelength (1.37m) and all set to 0 ms … [Continue reading]

Uncoupled Array Design: Beginnings and Endings (Updated)

** Update:  A downloadable version of the calculator to do this work is available (courtesy of Daniel Lundberg). Go to the bottom of this post for preview and instructions.  ______________________________________ When a coupled array is assembled, … [Continue reading]

A Concise Article on Cardioid Subwoofer Arrays – by Steve Bush

This article  Tech Talk: Building Directional Subwoofer Arrays Working toward consistency. was posted just today on the ProSoundWeb by Steve Bush. Well written, concise, plain English and NO MATH!  (lo siento que no es Espanol pero tiene … [Continue reading]

Two new pages added: Seminars past and future

Seminar schedule page details what I have currently scheduled and describes the course content. Past seminars is for pics and comments about previous ones.  If you have attended seminars in the past and have pics or comments - please send.  And if … [Continue reading]

15 Musicians and No Sound System

I went to see Wynton Marsalis and the Jazz at Lincoln Center Orchestra (JLCO) last night at a vintage hall here in St. Louis, The Sheldon Concert Hall (730 seats). I went for 2 reasons. First, a compelling interest in Jazz music and second, the … [Continue reading]

Phase alignment of spectral crossovers

This is a continuation of the impulse response subwoofer thread. Here are some screens from Sounds Systems: Optimaztion and Design that deal with phase alignment of crossovers. The figure above shows the phase responses brought together … [Continue reading]

Line Array Gain Taper (Breaking the Line II)

After Bob Gardam's comment on Breaking the Line I decided to give a quick go of the hypothetical scenario I had proposed in my reply: 12 boxes,  6 @ 2 degrees @ 0 dB, 3 @ 4 degrees @ -2 dB, 3 @ 8 degrees @ -4 dB. I made screen dumps of 3 … [Continue reading]

The modern science of room tuning

I have never really considered myself a scientist. I don't have a Ph.D.  I have a brother who is an MD, a sister with a Ph.D in neuroscience, another with a doctorate Latin American studies, an MBA sister, a brother with Ph.D in astronomy, one more … [Continue reading]