This is a experiment after a sub woofer seminar i recently did. During the seminar i first did a

>CSA array : Front Back standard so the rear sub gets delayed to the front sub measured at the back mic position. (rectangular selection orange screen shot below).

A while ago i was responsible for system alignment and SPL control in the city of Nijmegen for a event called the “4daagse”.

About little over a year ago I did a screen capture on the same subject. In that SCREEN CAPTURE I used 2nd order Allpass filters (it was done inside in a room with no acoustic treatment). In this screen capture I’ve only used delay (this was done outside). 

Cardioide Sub : Hoe in te meten met een FFT analyzer (Smaart in dit geval).

De laatste jaren worden op steeds meer evenementen Cardioide Sub Array’s toegepast vandaar nu dus een trainingsdag hier over.

This will be the last post on subs for now (I do have one more idea but that’s gonna take some time before I can do the measurements).

Within my companies inventory I have Meyer Sound 900LFC’s which is a “omni” sub and Fulcrum Acoustic CS121’s which is a passive cardioid sub.

After doing the screen captures on sub arrays (Gradient End Fired A mix between Gradient and End Fired End Fired CSA ) I wanted to know the difference between the 900LFC and the CS121. This post is by no means a lab test. I’m just playing with some cool gear.

I did a “couple” of posts on sub’s since I started this blog.

Here’s a whole bunch of them. (If there are mistakes sorry but I also learned from them I hope).

Link 1 recent / Link 2 recent / Link 3 recent / Link 4 recent / Link 5 recent / Link 6 recent / Link 7 start of 2017 / link 8 jan 2016 / Link 9 sept. 2013 / Link 10 sept.2013 / Link 11 sept 2013 / Link 12 aug 2013 / Link 13 april 2012 / link 14 march 2012

Also MAP on Line and the sub array calculator from Merlijn van Veen are valuable tools for understanding Sub array’s

Enjoy……

This is the last screen capture i’ll do for now on Cardioid Sub Array’s: A Gradient Sub Array or Reversed End Fired Sub Array (as i call this config).

This Configuration has to measured via 1 or multiple mics at the back of the array. First you capture a trace of the front sub and after that phase align the sub behind that sub by using delay.