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Re: 4 Pi Home Theater Build [message #73216 is a reply to message #73138]

Fri, 06 July 2012 12:32

NWCgrad
Messages: 143
Registered: March 2010
Location: Frederick, United States ...

Master

Wayne Parham wrote on Tue, 26 June 2012 10:32

That looks good from 100Hz up, which tells me the flanking subs are setup correctly. I do think you might benefit from adding one or two more distant subs to smooth the lowest modes. You could fill in that 60Hz notch, for example. That would make the 40-50Hz region sound less pronounced, because the bass would be more uniform, overall.

You'll notice the difference between the peaks and valleys below 100Hz is around 15dB. This is typical of room modes that aren't well damped. The peaks and dips above 100Hz would also be this large without your flanking subs filling them in. The flanking subs reduce the ripple by about half. Add another sub or two placed further away and you can expect the same sort of smoothing below 100Hz as the flanking subs provide above 100Hz.

One or two more subs, do I look like a sub junkie to you!

Okay, maybe I could become one. When I return to the US (nearly 1 year complete, 1 more to go) I am thinking about building true 3 Pi sub enclosures (vice 16" sealed cubes) for my flanking subs (set to the outside of the 4 Pi's), a JBL STX828S sub (dual 18" 2242 H drivers, 37 Hz 120 Hz +/- 3 dB), and a DIY 18" LLT (large, low tune) sub tuned to 11 Hz for the bottom (models at >110 dB at 10 Hz, 1200 W input, slightly under Xmax).

index.php?t=getfile&id=809&private=0

With proper distribution this combination should address the room modes and be flat from below 20 Hz to LPF.

If not, I could always add more

Attachment: myLLT1200wExodusMaelstrom-Xgen2.gif
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VIRIBUS MARI VICTORIA

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		4 Pi Home Theater Build By: NWCgrad on Thu, 12 May 2011 13:31
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 12 May 2011 13:42
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 12 May 2011 13:59
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 12 May 2011 14:08
		Re: 4 Pi Home Theater Build By: Dave_S on Thu, 12 May 2011 19:04
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 12 May 2011 21:16
		Re: 4 Pi Home Theater Build By: Wayne Parham on Thu, 12 May 2011 21:35
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 16 May 2011 10:44
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 16 May 2011 13:58
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 16 May 2011 14:31
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 16 May 2011 23:06
		Re: 4 Pi Home Theater Build By: Dave_S on Thu, 12 May 2011 23:31
		Re: 4 Pi Home Theater Build By: Bill Epstein on Fri, 13 May 2011 06:16
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 13 May 2011 20:01
		Re: 4 Pi Home Theater Build By: Dave_S on Sat, 14 May 2011 14:12
		Re: 4 Pi Home Theater Build By: Spec4 on Tue, 17 May 2011 16:55
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 17 May 2011 17:20
		Re: 4 Pi Home Theater Build By: Spec4 on Tue, 17 May 2011 17:32
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 17 May 2011 17:51
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 17 May 2011 21:46
		Re: 4 Pi Home Theater Build By: NWCgrad on Wed, 18 May 2011 20:16
		Re: 4 Pi Home Theater Build By: Wayne Parham on Wed, 18 May 2011 21:02
		Re: 4 Pi Home Theater Build By: NWCgrad on Wed, 18 May 2011 21:09
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 21 May 2011 22:26
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 21 May 2011 22:30
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 21 May 2011 22:39
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 23 May 2011 11:01
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 23 May 2011 11:42
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 23 May 2011 15:22
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 23 May 2011 17:17
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 24 May 2011 17:36
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 24 May 2011 19:02
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 24 May 2011 19:33
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 24 May 2011 21:07
		Re: 4 Pi Home Theater Build By: NWCgrad on Wed, 25 May 2011 19:33
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 26 May 2011 17:40
		Re: 4 Pi Home Theater Build By: Wayne Parham on Fri, 27 May 2011 10:57
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 28 May 2011 20:39
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 31 May 2011 18:52
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 31 May 2011 19:02
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 31 May 2011 20:30
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 31 May 2011 21:56
		Re: 4 Pi Home Theater Build - Primer and Paint Questions By: NWCgrad on Wed, 01 June 2011 11:54
		Re: 4 Pi Home Theater Build - Primer and Paint Questions By: NWCgrad on Thu, 02 June 2011 14:30
		Re: 4 Pi Home Theater Build - Primer and Paint Questions By: Wayne Parham on Thu, 02 June 2011 19:11
		Re: 4 Pi Home Theater Build - Primer and Paint Questions By: NWCgrad on Fri, 03 June 2011 10:39
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 06 June 2011 16:38
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 13 June 2011 16:54
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 13 June 2011 18:30
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 13 June 2011 19:04
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 13 June 2011 21:28
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 14 June 2011 14:58
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 14 June 2011 15:05
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 14 June 2011 16:48
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 16 June 2011 22:13
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 16 June 2011 22:16
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 16 June 2011 22:23
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 18 June 2011 19:44
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 18 June 2011 19:47
		Re: 4 Pi Home Theater Build By: Wayne Parham on Sat, 18 June 2011 23:04
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 18 June 2011 23:22
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 21 June 2011 20:57
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 21 June 2011 22:36
		Re: 4 Pi Home Theater Build By: blvdre on Tue, 21 June 2011 22:45
		Re: 4 Pi Home Theater Build By: NWCgrad on Wed, 22 June 2011 11:37
		Re: 4 Pi Home Theater Build By: blvdre on Wed, 22 June 2011 17:41
		Re: 4 Pi Home Theater Build By: NWCgrad on Sun, 26 June 2011 22:03
		Re: 4 Pi Home Theater Build By: NWCgrad on Sun, 26 June 2011 22:08
		Re: 4 Pi Home Theater Build By: Wayne Parham on Sun, 26 June 2011 23:06
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 28 June 2011 14:49
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 28 June 2011 15:07
		Re: 4 Pi Home Theater Build By: NWCgrad on Wed, 10 August 2011 02:29
		Re: 4 Pi Home Theater Build By: Wayne Parham on Wed, 10 August 2011 08:11
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 01 September 2011 05:42
		Re: 4 Pi Home Theater Build By: Wayne Parham on Thu, 01 September 2011 10:41
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 01 September 2011 20:54
		Re: 4 Pi Home Theater Build By: Wayne Parham on Thu, 01 September 2011 21:10
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 01 September 2011 21:23
		Re: 4 Pi Home Theater Build By: Wayne Parham on Thu, 01 September 2011 21:43
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 01 September 2011 21:47
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 03 September 2011 09:28
		Re: 4 Pi Home Theater Build By: Wayne Parham on Sat, 03 September 2011 21:01
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 03 September 2011 23:39
		Re: 4 Pi Home Theater Build By: Wayne Parham on Sun, 04 September 2011 01:00
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 16 September 2011 22:56
		Re: 4 Pi Home Theater Build By: smokarz on Sat, 17 September 2011 09:28
		Re: 4 Pi Home Theater Build By: Wayne Parham on Sat, 17 September 2011 10:46
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 26 September 2011 03:11
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 26 September 2011 02:41
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 26 September 2011 07:59
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 03 October 2011 19:49
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 03 October 2011 20:40
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 15 October 2011 01:12
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 15 October 2011 08:24
		Re: 4 Pi Home Theater Build By: Wayne Parham on Sat, 15 October 2011 08:45
		Re: 4 Pi Home Theater Build By: NWCgrad on Sun, 16 October 2011 20:59
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 17 October 2011 12:50
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 18 October 2011 05:32
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 18 October 2011 22:16
		Re: 4 Pi Home Theater Build By: Psychoacoustic on Wed, 19 October 2011 01:06
		Re: 4 Pi Home Theater Build By: NWCgrad on Sat, 22 October 2011 10:40
		Re: 4 Pi Home Theater Build By: Wayne Parham on Sat, 22 October 2011 13:31
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 17 November 2011 20:16
		Re: 4 Pi Home Theater Build By: Wayne Parham on Thu, 17 November 2011 21:52
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 18 November 2011 07:03
		Re: 4 Pi Home Theater Build By: tom-m on Fri, 18 November 2011 14:47
		Re: 4 Pi Home Theater Build By: NWCgrad on Sun, 20 November 2011 18:19
		Re: 4 Pi Home Theater Build By: petew on Mon, 21 November 2011 06:56
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 22 November 2011 18:09
		Re: 4 Pi Home Theater Build By: blacklabel0730 on Tue, 26 June 2012 14:52
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 06 July 2012 12:36
		Re: 4 Pi Home Theater Build By: skywave-rider on Fri, 18 November 2011 16:27
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 18 November 2011 20:49
		Re: 4 Pi Home Theater Build By: skywave-rider on Sun, 20 November 2011 14:11
		Re: 4 Pi Home Theater Build By: Psychoacoustic on Thu, 24 November 2011 22:06
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 24 November 2011 23:44
		Re: 4 Pi Home Theater Build By: skywave-rider on Fri, 25 November 2011 13:13
		Re: 4 Pi Home Theater Build By: NWCgrad on Tue, 26 June 2012 09:25
		Re: 4 Pi Home Theater Build By: Wayne Parham on Tue, 26 June 2012 10:32
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 06 July 2012 12:32
		Re: 4 Pi Home Theater Build By: blacklabel0730 on Wed, 22 August 2012 10:02
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 24 August 2012 05:14
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 29 August 2014 19:52
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 04 September 2014 06:56
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 04 September 2014 06:57
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 04 September 2014 07:00
		Re: 4 Pi Home Theater Build By: Wayne Parham on Thu, 04 September 2014 10:06
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 05 September 2014 17:35
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 08 September 2014 10:29
		Re: 4 Pi Home Theater Build By: NWCgrad on Thu, 11 September 2014 21:43
		Re: 4 Pi Home Theater Build By: Wayne Parham on Fri, 12 September 2014 08:30
		Re: 4 Pi Home Theater Build By: NWCgrad on Wed, 24 September 2014 18:35
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 12 December 2014 09:42
		Re: 4 Pi Home Theater Build By: Wayne Parham on Fri, 12 December 2014 10:35
		Re: 4 Pi Home Theater Build By: NWCgrad on Fri, 12 December 2014 11:30
		Re: 4 Pi Home Theater Build By: Wayne Parham on Fri, 12 December 2014 15:35
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 02 April 2018 14:00
		Re: 4 Pi Home Theater Build By: NWCgrad on Mon, 02 April 2018 14:04
		Re: 4 Pi Home Theater Build By: Wayne Parham on Mon, 02 April 2018 15:13
		Re: 4 Pi Home Theater Build By: tom-m on Mon, 02 April 2018 16:02
		Re: 4 Pi Home Theater Build By: NWCgrad on Wed, 11 April 2018 08:12
		Re: 4 Pi Home Theater Build By: NWCgrad on Wed, 11 April 2018 07:57

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