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Re: Multiple Subwoofer Set-Up & Calibration Guide
JohnK #305599 05/09/10 03:18 AM
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 Originally Posted By: JohnK
Note that the strongest mutual support would be if they were turned so that the drivers faced each other and were maybe just 2" apart.


Interesting. I didn't know that about co-location. Poor subwoofers, doomed to never quite kiss all to give ME pleasure.

Re: Multiple Subwoofer Set-Up & Calibration Guide
St_PatGuy #305600 05/09/10 03:18 AM
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 Originally Posted By: St_PatGuy
Could the drivers possibly hit each other that close?


That's what I was thinking, too.

Re: Multiple Subwoofer Set-Up & Calibration Guide
St_PatGuy #305601 05/09/10 03:22 AM
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Don't know what the maximum excursion on the EP800 drivers is, but if it might be a problem, make it 3-4" apart. The idea is to have the two sets of drivers pressuring each other.

I suppose if the grill cloths didn't touch each other, the driver cones obviously wouldn't either.

Last edited by JohnK; 05/09/10 03:26 AM.

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Re: Multiple Subwoofer Set-Up & Calibration Guide
JohnK #305604 05/09/10 03:29 AM
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I'm picturing Rock 'Em Sock 'Em Robots. . .but with subwoofers instead.


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Re: Multiple Subwoofer Set-Up & Calibration Guide
St_PatGuy #305605 05/09/10 03:34 AM
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See which grille gets knocked off first.

Re: Multiple Subwoofer Set-Up & Calibration Guide
#305606 05/09/10 03:36 AM
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CV needs to paint them red and blue first!


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Re: Multiple Subwoofer Set-Up & Calibration Guide
JohnK #305644 05/09/10 02:36 PM
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Xmech (maximum mechanical excursion) on the highest excursion woofers I know of is around 60mm. That is 30mm from the resting position or 1".

John. I thought you had to worry about compression if your driver is too close to another large object like a wall. The rule of thumb seems to be that if you locate two subs within a quarter wave Lent of each other you get the maximum gain (~6db) from co-location. This would suggest that a few inches would not make an appreciable difference.

On the other hand, if you put two EP800s about a foot apart facing each other, there should be just enough room for your head and maximum pressurization at the ears.


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Re: Multiple Subwoofer Set-Up & Calibration Guide
fredk #305672 05/09/10 05:19 PM
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This is a most interesting thread indeed. But I for one would love it if someone could draw up some diagrams showing in detail the different positions so that I can confirm if I'm getting this right in my head. I think I have a pretty good grasp of 'four corner placement', but I'm not quite sure if I have the correct picture of 'co-existing mid-wall' sub placement kicking around up there.

Also, John when you say, "two mid-wall placement with two subs co-located at each spot(and therefore strengthening the mid-wall output)was by a narrow margin the best of the options for a four sub placement", does it matter which two walls were being used? I have a fireplace in the midwall location to the right of my seating area, and french doors in the midwall position to the left of my seating position. So the only midwall location available to me is the back wall (since the TV is obviously taking up the front wall).

So then, would the best 4-subwoofer set-up in my room be two subs co-located midwall along the back wall, and two corner loaded subs in the front two corners? Just curious.


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Re: Multiple Subwoofer Set-Up & Calibration Guide
Micah #305675 05/09/10 06:15 PM
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One more question, I understand when talking about EP800's there are only woofers to contend with. But say with two EP600's or EP500's, do the ports pose any problems in doing this?

I want to see Obsi turn his eD subs towards eachother, crank it up, and see if he can't shift the earth axis point a smidge. \:D


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Re: Multiple Subwoofer Set-Up & Calibration Guide
Micah #305681 05/09/10 07:21 PM
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Kind of makes you wonder about the effect on a passive rad subwoofer too.


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