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Old 01-15-2020, 09:49 PM
johnau johnau is offline
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Default Distributed Bass Array - anyone have any experience?

Hi,
I've been reading about multi-subwoofer systems like Audiokinesis Swarm and Debra. The concept is interesting to me, smoothing out bass response in the room without the need for significant acoustic treatments.

My listening room is also the main family room, and acoustic treatment and bass traps don't have a high WAF factor. I may however be able to place some smallish subs against the walls in various places around the room (maybe even use\disguise them as small end tables).

Does anyone have any experience with a multiple sub system like these?
http://www.audiokinesis.com/the-swar...-system-1.html
https://jamesromeyn.com/audiokinesis...-models/debra/

Thanks!

- John
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Old 01-16-2020, 06:10 PM
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W9TR W9TR is offline
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John - I don’t have any experience with the specific products you’ve referenced. I did have four subs in my last theater build. It worked really well and provided uniform bass across the room.

Here is the theory behind the concept.

https://pdfs.semanticscholar.org/00d...e976a1a72e.pdf

Tom
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Last edited by W9TR; 01-16-2020 at 08:24 PM.
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  #3  
Old 01-16-2020, 06:34 PM
johnau johnau is offline
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Thanks Tom, I’ll look that over when I’m not on my phone!
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Old 01-16-2020, 08:30 PM
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Yep - it is definitely not phone friendly! It's a little technical but the illustrations are really good and it gives you an idea of what we are up against getting smooth bass response in smaller multi-purpose rooms.
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Main System:
Amati Futura Mains
Amati Homage VOX Center,
Proac Response 1sc Rears,
Three MC2301's for L,C,R
MC 602 for the rears
C 1100, MX 151, MCD 1100, MR 80
Nottingham Dais with Wave Mechanic
Sumiko Palo Santos Presentation

SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC

MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.

Lake House:
Ohm F, MC 275V, C2300, MR 77, Rega P3

OnDeck:
McIntosh MAC 4300v
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  #5  
Old 01-25-2020, 07:09 PM
Charles Charles is offline
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"By carefully locating the loudspeaker and
listener within the room the frequency response can be
made relatively smooth at a single listening location, as in
the following example."

I think the key is how many people and listening locations? I listen almost exclusively by myself. I have found that a single very large very high quality sub located in the plane of the main speakers and exactly between the main speakers can work really well and this sentence seems to support my findings. Multiple subs require multiple amps, wall sockets, cables, cords, etc. The typical setup you see is stereo subs in corners well behind the main speakers. I have never understood this rationale. In practical terms stereo subs is about all you see because of the total impracticality of 4 subs. I don't think stereo subs in corners smooths out anything. As far as dynamic range 2 subs only provides an extra 3 dB, totally inconsequential.

Charles

Last edited by Charles; 01-25-2020 at 07:12 PM.
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Old 01-26-2020, 06:38 PM
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A co-worker had a AK swarm and the bass was exceptional - he had no treatments. One of the best smooth responses I have experienced.
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