I think there's more to it than that. The mono sub tends to be omnidirectional. Case in point, the dipole wouldn't be doing its thing if the bass wasn't wrapping around the baffle.
Which then creates significant velocity at the sides. This causes a lot of confusion I believe. Linkwitz has explained this and I think it has been misinterpreted a little.
Which then creates significant velocity at the sides. This causes a lot of confusion I believe. Linkwitz has explained this and I think it has been misinterpreted a little.
I'm joking, to a degree. With bass frequencies in a room, relatively small by bass wavelength standards, things don't appear to be that clear cut. I was quite surprised by the amount of output from the simple baffle directly into the corner for example.
Has anyone any more comments on the Parts Express corner dipole sub?
I wish there was a better vertical look at how it sits in the corner,,, and a description. I am excited because of the frequency graph they have posted with it.
I wish there was a better vertical look at how it sits in the corner,,, and a description. I am excited because of the frequency graph they have posted with it.
The parts express corner dipole design is my adaption of George's for 15s. It sounds great with music to me but is spl limited below 30hz. I've found that it performs the best with one of the woofers in reverse polarity. So you get + output from the left and - output from the right and the back (in the corner) is a cancellation.
I've found this design to sound great with bass guitar especially a song that has quick note changes. The slam of a kick drum is better handled by my 7foot 40hz folded horn towers.
I'd like to do some experiments with acoustic elegance drivers in sealed enclosures because I'm not sure how much of the magic is the dipole or the high quality drivers.
The picture earlier in this forum is with it upside down. The common opening fires into the corner.
I've found this design to sound great with bass guitar especially a song that has quick note changes. The slam of a kick drum is better handled by my 7foot 40hz folded horn towers.
I'd like to do some experiments with acoustic elegance drivers in sealed enclosures because I'm not sure how much of the magic is the dipole or the high quality drivers.
The picture earlier in this forum is with it upside down. The common opening fires into the corner.
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That sounds similar to a single baffle 45 degrees into the corner which I found best in my test, have you tried that as a comparison?
I haven't tried the CDW design yet but I would like too. Is there a function to the curved baffles?
Just asking cause I have a rectangular piece of mdf with two 15" cut outs in it already that I could slice in half and then put the bevel on the ends.
Just asking cause I have a rectangular piece of mdf with two 15" cut outs in it already that I could slice in half and then put the bevel on the ends.
I meant single baffle like this http://www.kingdom.uk.com/jdfiles/side_open_right_full.jpg I found it worked better than the CDW which I tried also. I got the baffle right into the corner, it worked surprisingly well so long as I wasn't in the null.
Oh I see. I haven't tried that one. Might not work for my sitting location though. What's your basis for better? More even FR or more spl without distortion?
I had about 10db louder bass at 5% distortion by reversing the polarity on one of the woofers.
I had about 10db louder bass at 5% distortion by reversing the polarity on one of the woofers.
You could try angling the baffle, it doesn't have to be 45 degrees, very simple to try 🙂 I got more output than the CDW, one null instead of two very closely spaced nulls.
That was also my idea, and I built two sealed cabinets located in different corners .....
This article finally convinced me
corner loaded louspeakers
Only I didn't go for dipoles, I preferred to use two cabinets for each speaker, it helps eliminate room modes, and you have more total SPL
I see the possibilities with your OB corner horn placement. The rear wave firing upward with gusto would cause its wave to take extra time to come around and cancel. Almost like cardeoide. Can't spell it.
But I've also given firing a sealed box into a corner like you've stated. The sealed box (faced into the corner) could fire into a pair of half-round pipes to direct the sound waves smoothly to the walls. Could even place a large half pipe the size of the cabinet on the backside of the cabinet that faces the listener for an even larger horn.