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Re: Mono "flanking sub" [message #81657 is a reply to message #81656]

Mon, 09 November 2015 12:57

Wayne Parham
Messages: 18689
Registered: January 2001

Illuminati (33rd Degree)

We can see that the flanking sub approach is smoothing the mains through reduction of the notch around 95Hz - 100Hz. This is largely because of the sub's physical relationship to the mains - Even though there's just one helper woofer, it's still a couple feet away in each plane. So we can see your mono flanking subwoofer approach works pretty well for smoothing.

From your measurement data, I'd say this is a workable solution provided the single summed subwoofer doesn't throw off the image. That was my biggest concern really - The flanking sub approach requires moderately high-frequencies blended in the subwoofer and the main it is flanking.

Lower midrange can be localized, giving perceptional cues of the position of the source. Having a shared flanking subwoofer between the mains can smooth the self-interference notches - as your measurements have shown - but I was concerned it might mess up the stereo image. I suppose that's a subjective thing, and might be content sensitive. Some (nearly mono) material might sound very good in a single flanking sub setup, while others (with highly panned content) might not work as well.

As for the comments/questions about "time alignment", remember that is impossible to align in three dimensions. You can synchronize in one position, but not all. That's what the multi-sub and flanking-sub approaches are all about. They mitigate anomalies that are created specifically because sound sources and their reflections cannot possibly be time aligned.

Thanks for your feedback on this single summed flanking sub approach. It is very useful and interesting to see.

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[Message index]

		Mono "flanking sub" By: jonone on Sat, 24 October 2015 05:50
		Re: Mono "flanking sub" By: Wayne Parham on Sun, 25 October 2015 15:20
		Re: Mono "flanking sub" By: jonone on Mon, 26 October 2015 08:14
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 26 October 2015 08:44
		Re: Mono "flanking sub" By: jonone on Mon, 26 October 2015 12:05
		Re: Mono "flanking sub" By: jonone on Mon, 26 October 2015 15:06
		Re: Mono "flanking sub" By: Wayne Parham on Tue, 27 October 2015 13:23
		Re: Mono "flanking sub" By: johnnycamp5 on Tue, 27 October 2015 18:14
		Re: Mono "flanking sub" By: jonone on Thu, 29 October 2015 04:10
		Re: Mono "flanking sub" By: johnnycamp5 on Thu, 29 October 2015 11:24
		Re: Mono "flanking sub" By: jonone on Thu, 29 October 2015 14:23
		Re: Mono "flanking sub" By: johnnycamp5 on Fri, 30 October 2015 05:10
		Re: Mono "flanking sub" By: jonone on Fri, 30 October 2015 05:17
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 30 October 2015 16:37
		Re: Mono "flanking sub" By: johnnycamp5 on Fri, 30 October 2015 17:58
		Re: Mono "flanking sub" By: jonone on Sat, 31 October 2015 13:21
		Re: Mono "flanking sub" By: Wayne Parham on Sat, 31 October 2015 15:37
		Re: Mono "flanking sub" By: jonone on Sun, 08 November 2015 13:52
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 09 November 2015 12:57
		Re: Mono "flanking sub" By: jonone on Mon, 09 November 2015 14:44
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 09 November 2015 21:14
		Re: Mono "flanking sub" By: jonone on Tue, 10 November 2015 14:06
		Re: Mono "flanking sub" By: Wayne Parham on Tue, 10 November 2015 14:43
		Re: Mono "flanking sub" By: jonone on Tue, 10 November 2015 15:21
		Re: Mono "flanking sub" By: jonone on Tue, 10 November 2015 16:21
		Re: Mono "flanking sub" By: Wayne Parham on Wed, 11 November 2015 14:16
		Re: Mono "flanking sub" By: jonone on Wed, 11 November 2015 14:38
		Re: Mono "flanking sub" By: jonone on Tue, 24 November 2015 11:01
		Re: Mono "flanking sub" By: Wayne Parham on Tue, 24 November 2015 12:46
		Re: Mono "flanking sub" By: jonone on Tue, 24 November 2015 14:01
		Re: Mono "flanking sub" By: jonone on Wed, 25 November 2015 16:12
		Re: Mono "flanking sub" By: Wayne Parham on Wed, 25 November 2015 18:08
		Re: Mono "flanking sub" By: jonone on Thu, 26 November 2015 02:58
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 27 November 2015 16:23
		Re: Mono "flanking sub" By: jonone on Sat, 28 November 2015 11:29
		Re: Mono "flanking sub" By: jonone on Sun, 29 November 2015 14:41
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 30 November 2015 10:31
		Re: Mono "flanking sub" By: jonone on Mon, 30 November 2015 12:27
		Re: Mono "flanking sub" By: johnnycamp5 on Tue, 01 December 2015 12:01
		Re: Mono "flanking sub" By: jonone on Tue, 01 December 2015 16:05
		Re: Mono "flanking sub" By: johnnycamp5 on Tue, 01 December 2015 20:10
		Re: Mono "flanking sub" By: jonone on Wed, 02 December 2015 02:58
		Re: Mono "flanking sub" By: johnnycamp5 on Wed, 02 December 2015 05:19
		Re: Mono "flanking sub" By: jonone on Wed, 02 December 2015 07:07
		Re: Mono "flanking sub" By: jonone on Sat, 05 December 2015 08:27
		Re: Mono "flanking sub" By: johnnycamp5 on Sat, 05 December 2015 15:54
		Re: Mono "flanking sub" By: jonone on Sun, 06 December 2015 04:26
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 03:00
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 08:46
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 10:50
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 11:08
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 12:39
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 12:46
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 13:01
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 13:40
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 14:30
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 14 July 2016 15:00
		Re: Mono "flanking sub" By: jonone on Thu, 14 July 2016 15:32
		Re: Mono "flanking sub" By: jonone on Fri, 15 July 2016 03:27
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 15 July 2016 08:36
		Re: Mono "flanking sub" By: jonone on Fri, 15 July 2016 08:49
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 15 July 2016 10:25
		Re: Mono "flanking sub" By: jonone on Fri, 15 July 2016 11:09
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 15 July 2016 13:41
		Re: Mono "flanking sub" By: jonone on Fri, 15 July 2016 13:53
		Re: Mono "flanking sub" By: Wayne Parham on Fri, 15 July 2016 17:16
		Re: Mono "flanking sub" By: jonone on Sat, 16 July 2016 01:37
		Re: Mono "flanking sub" By: Wayne Parham on Sat, 16 July 2016 09:06
		Re: Mono "flanking sub" By: jonone on Sat, 16 July 2016 09:25
		Re: Mono "flanking sub" By: johnnycamp5 on Sat, 16 July 2016 11:48
		Re: Mono "flanking sub" By: Wayne Parham on Sun, 17 July 2016 09:31
		Re: Mono "flanking sub" By: jonone on Sun, 17 July 2016 10:04
		Re: Mono "flanking sub" By: Wayne Parham on Sun, 17 July 2016 11:16
		Re: Mono "flanking sub" By: jonone on Sun, 17 July 2016 12:05
		Re: Mono "flanking sub" By: jonone on Sun, 17 July 2016 12:55
		Re: Mono "flanking sub" By: Wayne Parham on Sun, 17 July 2016 15:31
		Re: Mono "flanking sub" By: johnnycamp5 on Sun, 17 July 2016 16:18
		Re: Mono "flanking sub" By: jonone on Mon, 18 July 2016 07:52
		Re: Mono "flanking sub" By: Wayne Parham on Mon, 18 July 2016 10:46
		Re: Mono "flanking sub" By: jonone on Wed, 10 August 2016 13:25
		Re: Mono "flanking sub" By: Wayne Parham on Wed, 10 August 2016 15:01
		Re: Mono "flanking sub" By: jonone on Thu, 11 August 2016 08:00
		Re: Mono "flanking sub" By: Wayne Parham on Thu, 11 August 2016 08:40
		Re: Mono "flanking sub" By: jonone on Thu, 11 August 2016 14:54
		Re: Mono "flanking sub" By: jonone on Fri, 21 October 2016 12:52

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