Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: Jul 2006
Posts: 12,077 Likes: 7
Founder, Axiom Upgrade Club shareholder in the making
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Founder, Axiom Upgrade Club shareholder in the making
Joined: Jul 2006
Posts: 12,077 Likes: 7 |
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.
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: Jul 2006
Posts: 12,077 Likes: 7
Founder, Axiom Upgrade Club shareholder in the making
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Founder, Axiom Upgrade Club shareholder in the making
Joined: Jul 2006
Posts: 12,077 Likes: 7 |
Could the drivers possibly hit each other that close? That's what I was thinking, too.
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
Joined: May 2002
Posts: 10,654 |
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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Enjoy the music, not the equipment.
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: Mar 2005
Posts: 7,463 Likes: 1
axiomite
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axiomite
Joined: Mar 2005
Posts: 7,463 Likes: 1 |
I'm picturing Rock 'Em Sock 'Em Robots. . .but with subwoofers instead.
*********** "Nothin' up my sleeve. . ." --Bullwinkle J. Moose
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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htnut
Unregistered
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htnut
Unregistered
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See which grille gets knocked off first.
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: Mar 2005
Posts: 7,463 Likes: 1
axiomite
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axiomite
Joined: Mar 2005
Posts: 7,463 Likes: 1 |
CV needs to paint them red and blue first!
*********** "Nothin' up my sleeve. . ." --Bullwinkle J. Moose
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: Dec 2007
Posts: 7,786
axiomite
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axiomite
Joined: Dec 2007
Posts: 7,786 |
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.
Fred
------- Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: Nov 2008
Posts: 1,789
connoisseur
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connoisseur
Joined: Nov 2008
Posts: 1,789 |
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.
My Stuff :
M80's QS8's VP150 EP800 Denon 4802 Emotiva XPA-3 Samsung BD-P3600 Sharp 65 Inch Aquos LCD
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: Nov 2008
Posts: 1,789
connoisseur
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connoisseur
Joined: Nov 2008
Posts: 1,789 |
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.
My Stuff :
M80's QS8's VP150 EP800 Denon 4802 Emotiva XPA-3 Samsung BD-P3600 Sharp 65 Inch Aquos LCD
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Re: Multiple Subwoofer Set-Up & Calibration Guide
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Joined: Dec 2008
Posts: 6,928
axiomite
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axiomite
Joined: Dec 2008
Posts: 6,928 |
Kind of makes you wonder about the effect on a passive rad subwoofer too.
Half of communication is listening. You can't listen with your mouth.
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