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Post by nicktf on Aug 22, 2007 10:06:11 GMT -7
In the FAQ I willfully error on the side of recommending too large a opening just to compensate for the all too frequent requests for WAY to small an opening. A somewhat smaller opening doesn't decrease the output, it changes a different parameter, but you don't need to be concerned with that if you use an approx 24" cube. Not to steal from the thread but I came across this and have a question regarding the above regarding manifold opening size. At this point i'm planning on the 6 SSD 18s and want to do a manifold with 1 driver on the top, one driver on the bottom, opposed firing at each other, and then the remaining 4 drivers on the sides opposed firing each other. I'd like to do this to keep the total length down. With opening dimensions of 22" x 42" I get 5961 cm^2. The total driver area will be 7260 cm^2. Do you think that will hurt anything accoustically? I noticed you said the output doesn't reduce but that a parameter changes. What parameter is that and do you think it will change in my proposed design? What does this parameter do to sound? Thanks for the help man. BTW, to the original poster, that sounds like a killer setup. Considering i'll be using the same drivers i'd love to know how it turns out!
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Post by kadiddle on Aug 22, 2007 14:31:32 GMT -7
You have to have at least one side of the manifold open to the listening area. If you put a driver in there, where will it vent? It's backwave will go into the manifold and fight the other drivers. kadiddle
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Post by nicktf on Aug 22, 2007 16:44:15 GMT -7
You have to have at least one side of the manifold open to the listening area. If you put a driver in there, where will it vent? It's backwave will go into the manifold and fight the other drivers. kadiddle Were you talking about my proposed design? All drivers will be on the exterior of the manifold leaving the center free to vent into my living room. I could also do each of the three long sides of the manifold with a pair of drivers now that I think about it. In other words moving the top and bottom drivers to the rear baffle of the manifold. I'm not sure what you're getting at kadiddle? Whoops, just did realize that if I moved the bottom and top drivers to the rear baffle those two drivers would not cancel each others mechanical forces to no go for that idea.
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Post by kadiddle on Aug 23, 2007 10:38:50 GMT -7
quote "want to do a manifold with 1 driver on the top, one driver on the bottom, opposed firing at each other, and then the remaining 4 drivers on the sides opposed firing each other."
Square or rectangular manifolds have 6 sides. You said one on top, one on bottom, 4 on the sides. That leaves no open side to vent into the room. kadiddle
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Post by nicktf on Aug 23, 2007 11:49:54 GMT -7
quote "want to do a manifold with 1 driver on the top, one driver on the bottom, opposed firing at each other, and then the remaining 4 drivers on the sides opposed firing each other." Square or rectangular manifolds have 6 sides. You said one on top, one on bottom, 4 on the sides. That leaves no open side to vent into the room. kadiddle Sorry, guess, i've confused some. The top/bottom means small ends of the rectangle. The sides mean the longs sides which are perpindicular to the open face of the manifold. All drivers will be mounted on the exterior portion of the manifold ofcourse with the only open face of the manifold ofcourse firing into the room.
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