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-   -   Good read about PA subwoofer requirements (http://www.diyaudio.com/forums/pa-systems/187411-good-read-about-pa-subwoofer-requirements.html)

m R g S r 19th April 2011 09:27 PM

Good read about PA subwoofer requirements
 
I was curious what frequency range bass lies in house music tracks and stumbled upon this. Good read not too technical!
http://lostinmusik.files.wordpress.c...4/funktion.jpg

m R g S r 19th April 2011 09:49 PM

Woops wrong link!

m R g S r 20th April 2011 12:42 AM

here is the right link...sorry about that, i was posting from my phone.

Is there a correct key to write dance music in? The short answer is yes.

I was referring to this part "A veteran music producer friend (and king of making things sound LOUD) never writes stuff in Cmin, Dmin or Emin – the 0th root note is just too low in the register he says"

The Cmin, Dmin and Emin lowest frequencies that he scanned were 33,37,41hz respectively.

"So I looked what the big producers were doing. Here is a collection of spectrograms for eight big big tracks (from producers Pryda, Steve Angello, Mark Knight, Gareth Emery etc)."
"The most common feature is the bass always sitting around 45-55hz. This is probably the ideal found from years and years of producing and DJing. You want a bass that will rumble the Funktion One bass bins but also be audible in a pair of tiny in-ear headphones."


I think this is pretty helpful for those trying to figure out a necessary bottom end requirement for their PA sub. Not everyone NEEDS 30hz!

18Hurts 20th April 2011 01:23 AM

I guess if you are mobile, 40Hz with a good filter should do it for you. Back in my mobile days, I was at 40Hz and it worked fine. My buddy ran down to 30Hz and ran huge cabinets to get there. Very impressive system but it took two people to move it.

However, if I was going to be putting in a permanent install in a club--go for 30 to 35Hz to handle the dropped tuning if bands patch into your house system? I guess it all matters what the requirements are for permanent installations. I was asked by the local church about improving their sound system--they wanted THX level surround sound (!) I told them 121 dB at the seats at 20Hz could be done, give Tom Danley a call and it will run the high 5 figures. That little reality cleared it up though, they wanted some subwoofers to go with the JBLs for the piano music.

m R g S r 20th April 2011 01:37 AM

Yes I meant about portable PA stuff. Permanent install sure go nuts!!

weltersys 20th April 2011 01:37 AM

Quote:

Originally Posted by m R g S r (Post 2544506)
I think this is pretty helpful for those trying to figure out a necessary bottom end requirement for their PA sub. Not everyone NEEDS 30hz!

True, there is no more musical NEED for the octave below 40 Hz than the octave above 10,000 Hz.

But there is a lot of musical information in both of those octaves.

I miss the LF if it is not there just as much as the HF.

Top Shelf 21st April 2011 01:44 PM

I posed a similar question on another forum , and the moderator was kind enough to use his software to do screen captures of several electronic music genres. The screen shots showed trance related music to have the most bass energy in the 45-55 hz region as well. He did a capture of a dubstep track(bass nectar) and 46 hz was dominant. Seems that 20-25 hz energy was about 18 dB down from the peak @ 46 though. But that's just one track so I wouldn't take it as a representation.

wg_ski 21st April 2011 02:52 PM

Quote:

Originally Posted by weltersys (Post 2544533)
I miss the LF if it is not there just as much as the HF.

That's the problem. Take a track with a fundamental at 46 Hz and very little content in the 20-25 Hz range, hit it with a high pass at 40 and it sounds like the bass just disappeared. Boost above that to "recover" it and all you get is boomy sound. I guess that's why most PA rigs just sound boomy.


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