ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: 1 ... 7 8 [9]   Go Down

Author Topic: subs and deploying them 'in the round'  (Read 85514 times)

Edward Challanger

  • Jr. Member
  • **
  • Offline Offline
  • Posts: 97
Re: subs and deploying them 'in the round'
« Reply #80 on: July 08, 2005, 08:38:54 am »

who i can get LARA ?

direct link ?

thank you

Very interesting article.
Logged

Langston Holland

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 908
Re: Measurements (Link Update)
« Reply #81 on: April 10, 2010, 05:40:51 pm »

This thread is easily my favorite since I began reading the forum almost a year ago. There are some heavy hitters hanging around here and I want to thank Mike for his excellent post and Harry for the personal emails that contain a depth that can only come from a great deal more experience than I have. He's got excellent taste behind a console as well -- I've heard him. Phill has taught me more than any other single individual with literally dozens of emails over the last year that could fill a small book. Craig is my lighting instructor and I'd thank Geri O for his help, but he'd spill his coffee. :) The service and insight I get from Chuck at EAW is scary. Tom
Logged
God bless you and your precious family - Langston

Soundscapes <><

Langston Holland

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 908
Re: Measurements (cont) (Link Update)
« Reply #82 on: April 10, 2010, 05:42:21 pm »

BEGIN PART 2 of 2

Standard Array:

http://homepage.mac.com/soundscapes/PSW/SubArrays/4Sub_Std_Front.jpg

Cardioid Array front:

http://homepage.mac.com/soundscapes/PSW/SubArrays/4Sub_Cardioid_Ben.jpg

Cardioid Array side:

http://homepage.mac.com/soundscapes/PSW/SubArrays/4Sub_Cardioid_Side.jpg

The following Smaart captures contain a white trace that is the 5ft high forward mic (front blue mic position), red trace that is the 5ft high rearward mic (rear blue mic position), and a green trace that is the 10ft high rearward mic (also rear blue mic position).

Bonus: (bottom 2 BH760's only, notice the 6dB front to back peak output differential and the 10dB spread around 75Hz. This is not a cardioid arrangement, just an advantage of horn subs.)

http://homepage.mac.com/soundscapes/PSW/SubArrays/Smaart_2Std.jpg

Standard 2 x 2 Array:

http://homepage.mac.com/soundscapes/PSW/SubArrays/Smaart_4Std.jpg

Cardioid 2 x 2 Array: (rear delay with polarity reversal, er... WOW)

http://homepage.mac.com/soundscapes/PSW/SubArrays/Smaart_4RD.jpg

Cardioid 2 x 2 Array: (front delay only)

http://homepage.mac.com/soundscapes/PSW/SubArrays/Smaart_4FD.jpg

Forward Outputs of each Array Compared:(White is 2 x 2 Std, Blue is 2 x 2 Front Delay, Red is 2 x 2 Rear Delay, and Green is 1 x 2 Std)

http://homepage.mac.com/soundscapes/PSW/SubArrays/Smaart_Front_Comparisons.jpg

Observations:

1. Harry's right - it really works and the rear delay scenario approaches true cardioid behavior. Hearing the test signal go away at the rear was quite entertaining, but it's a shame the neighbors' homes wereon-axis to the front of the array. :))

2. Out in front of the subs, I prefer the sound of the kick with the standard or front delayed cardioid arrays. I couldn't tell the difference between them, which was as I'd hoped. The kick sounded a little softer, not just SPL, but more "rounded" - not quite as "tight" with the rear delayed cardioid array. It's likely that I would not have been able to hear this effect if I had my top cabs on.

3. What now? MUSIC! I played the kick that I recorded from my favorite local drummer with a Beta 91 and walked around the subs. Something weird happened that totally messed me up. The kick was noticeably quieter at the rear of the cardioid sub array that used the front delayed scheme. Look at those measurements - that should NOT happen - the rear delay scheme had much less measured output and sounded much quieter with the test signal. I double-checked the processor settings and reacquired a couple of measurements - same results - but that kick still refused to play fair. Then I went inside and analyzed the kick recording. Here's a representative hit:

http://homepage.mac.com/soundscapes/PSW/SubArrays/KickAnalysis.jpg

Notice the peak in the mid-60Hz to mid-70Hz region. Now go back and look at the Smaart measurements for the two cardioid array schemes and look at the front delayed dip in this region. You can also cheat and look at the following plot where the green trace of the front delay is 3 - 8dB lower than the purple trace of the rear delay scheme. Pretty sneaky! I try to get the bass guitar to fill in the region below the kick. In that situation, the rear delay cardioid will win the day, although the bassist may wonder why the subs are "off". :)

http://homepage.mac.com/soundscapes/PSW/SubArrays/Smaart_4FD_Surprise.jpg

Conclusions:

1. The measurements supported the predictions in an outdoor situation.

2. The front delayed cardioid array is for me. An amazing improvement that I have ProSoundWeb's forum to thank for. Virtually identical forward output with an eerie lack of kick "on stage". Walking around the subs at a constant radius reminded me of walking around a parked car at night with its headlights on, you were lit up only when you got in front. Parked is important. :)

3. I speculate that I would have chosen the rear delayed cardioid array if I were using caveman front-loaded subs due to my typical deployment of center sub arrays.

4. Be very careful how you interpret these results if you make your living at this. I have a feelingthat some bands are not going to believe me when I tell them the subs really work and I may have to revertto the standard array to please them. I have actually done sound for a troupe of deaf dancers that use thebass spill on stage to feel the music and move accordingly. Card sub arrays can be inappropriate - but I can't wait to start using them! :))
Logged
God bless you and your precious family - Langston

Soundscapes <><

Ed Spoto

  • Jr. Member
  • **
  • Offline Offline
  • Posts: 51
Re: subs and deploying them 'in the round'
« Reply #83 on: April 10, 2010, 10:05:38 pm »

We deployed the TM array in the round at Cowboys Stadium for the Pacquiao Clotty Fight. I was amazed at the response and even coverage.  I'll post pics and plots Monday when I get back to work.
Logged

David Stiles

  • Full Member
  • ***
  • Offline Offline
  • Posts: 190
Re: Measurements (cont) (Link Update)
« Reply #84 on: April 11, 2010, 03:09:26 am »

thanks for resurecting this thread langston,and for the effort to make the visuals available.
Logged

ProSoundWeb Community

Re: Measurements (cont) (Link Update)
« Reply #84 on: April 11, 2010, 03:09:26 am »


Pages: 1 ... 7 8 [9]   Go Up
 



Page created in 0.025 seconds with 21 queries.