Cardioid Sub Workshop | Inverted Gradient

Excellent info Michael. Thanks.

So much info in your videos. We are trying to redo our sound system in our church, but on a tight budget. The main area is like 75ft wide and like 25ft deep. Have a suggestion on a video of yours to approach this? We’re pretty sure one of the first things we need to do is sound dampening. None currently exist. Whoever did the sound before just dropped a huge powered dual 18 JBL powered sub on one side corner of the stage.

You can do a similar deployment with only two subs and increase the rearward reduction of SPL. If you have to have your subs on the sides of the stage, and you only have two subs per side, you can lay them side by side and get a 45* angle of cancellation in relation to the plane of the subs. A picture is worth a thousand words, but that doesn't work here, so perhaps one day I will present it on my channel, but for now, you just have to imagine. There are also two different ways you can delay the subs for rearward cancellation. One will provide better forward coherence, the other will increase rearward cancellation at the cost of reduced forward coherence.

First off thank you for these videos. Second what is the best set up for 3 subs non cardioid and without all of the fancy delay and Dsp stuff? Basically quick on the go dj stuff

Brilliant video and very clear, I was at a festival recently and noticed the subs stacked with one facing back, wanted to know what this effect was and why it happens. It was at a festival so I am assuming that they are trying to minimse the noise and vibration to the surrounding area. Totally a beginer comment and not sure if you ever work with music festivals, but would be really interested to learn more like stage positioning etc. Keep up the amazing videos and your craft shows.

Great info, thanks so much! I have a couple of questions: can I do the same cardioid arrangement with just 2 subs? I am also confused as why the sub facing the rear would get the delay. Shouldn’t the one facing the front get the delay? Many thanks

Great information! So using this setup with electronic delay and polarity inverted, there is no need to physically move the center sub towards the stage (quarter wave-length behind the other subs)?

You're rocking the Opie look

What would you recommend to be the crossover frequency, when using this Subs and kw12s?

What array you recommend when stage is solid concrete and subwoofers in in front of the stage front? Thank you

I’m working with a bit of a Frankenstein passive set up - 3 srx718’s but two different amps to power them. How precisely do the speakers need to match in output before you start getting funky results?

Just checking Michael but would this also work with an array of 4 subs (2 ouside facing forwar and 2 inside facing back?), or 6 even (4 forward 2 back in similar arrangement to the video)?

Watched this and other videos of yours a few times and this weekend, I'm going to try a 2 sub cardioid deployment. Unfortunately it'll be at one side of our "stage" as we have no room below or in front of us (function band ). I'm wondering if it'll be helpful to run the opposite side top full range and the sub side through the crossover?

Thank so much Michael. You reference stacking the array vertically. Do you have any more information on this? Does it change the coverage pattern?

Hi, thanks for the videos making it pretty clear how all this cardoid stuff works, 1 question : why 3 subs ? wouldn't it work with just 2 like the inline gradient ?

Very in-depth but this is making my head hurt-LOL! Show me how you do it by either using the your mixer or DSP on the sub box and letting us hear the difference!

Michael, you may have covered this but in the 3 speaker cardioid array is the volume the same for all speakers.

Is it possible to do 5 singles 18's. Just adding two more to what you have in the video. Inverting sub 2 and 4 in the line

Hi, maybe just i didnt get the info right but how do you get physical displacment time? It is the physical dimension of the box? Why it is important to me?

Can i apply this setup on dual subs?