Dave Rat - Live sound Subwoofer configurations Part 3

In this video I cover the two primary methods of creating a cardioid sub configuration with conventional subs along with some assets and issues with each.

Category:

Education

Tags:

• Dave
• Rat
• Sound
• Subwoofer
• Roadies
• in
• the
• midst
• cardioid
• sub
• PA
• system
• systems

[nellkirsten]

Sorry for my lack of knowledge...but why 1/4 wavelength?

[www73171]

@nellkirsten if the distance is 1/4 and the time delay is 1/4 then in front  of the speakers the signals add together. Behind the speakers the farther away speakers are bot 1/4 wavelength farther away and 1/4 wavelength delayed. 1/4 +1/4 = 1/2 and 1/2 wavelength offset gives you maximum cancellation.

[thaflyinsoundman]

Your videos are like crack... I'm addicted and I want more! haha

On a serious note, how often do you set your subs up like that? Is it a usual thing, or is it something you do on a special occasion basis?

[www73171]

@thaflyinsoundman At the Coachella pics for the Sahara tent last year we did exactly that setup, the non polarity version. And I use a form of the non polarity rev version all the time. If ya do a quicksearch of my blog for "subs" there is lots more info.

[FLIPP0P0TAMUS]

hey dave ive done some playing around in mapp. any chance you could take a look at my configurations and tell me how they might sound in an arena environment?

[www73171]

@FLIPP0P0TAMUS I hope to do another video soon on how to read your predictions to see how good they will sound versus coverage as well as offer some arena solutions.

[danlawrencetube]

Have never commented on youtube before but have to say that this video is the most phenomenally interesting turorial i have ever seen/read. Ridiculously well put together and explained. Thanks for taking the time and effort.

[MrAnomilus]

Great presentation, Dave.

[ladjkaoz]

wow..

you have a great way to explain phases and polarity...

keep it rockin dave

[tolley1466]

Hey Dave, are there any videos or explanations on what L'acoustics use in their cardioid configurations with the LA4 and 8s? Is there any delay used?

[P90xFitnessExpert]

Man, I love your videos... How did you make it look so good?

[drummerclint]

Wow, that is absolutely amazing! I can't believe you're taking the time to explain this stuff. Thank you so much!

[edwardjohanbol]

I think this is why Rage Against The Machine sounded bloody terrible at Reading Festival a few years back... it was a right mess...

great vids, very interesting, good to get some confirmation of some of my own theories.

[YannickDP]

Man this is awesome interesting. Just some questions: Are these configs only possible with cardioid subs? I don't get why else you would measure for the time delay at the front of the speaker, if you'd use omni-subs. And also: What happens in the vertical plane using these techniques? I mean you put the second sub underneath the stage right? Doesn;t this increase sub-spill on stage? Thx, this is killer!