I recently built a 'line array' system using 8x 6.5" woofers an a Compression Horn for each stack. Each box had 2x 6.5" woofers and one box has the compression horn. I originally designed these boxes to be very simple to build and easy to replace a faulty part, if needed. The stack single stack of 5 speakers was clean and powerful.
Here's a couple pictures:
After having this for a few months I thought what if I put all eight 6.5" woofers in one box of the same size? So I started messing around on cad and found that you can actually fit all 8 speakers in one box and still have room for a compression horn. This would mean that this single box would be as powerful as that original stack of 5
Here's the design and sim:
I only modeled it out as if there was one chamber with the total volume and all 8 speakers. I'm not sure how to simulate the two areas where the speakers are facing. The two side chambers are 4.5L each and the middle chamber is 8.8L. There are two 7/8" diameter circle ports that are .5" deep. (The middle camber is drawn with 3/8 wood but the actually box would be a half inch thick)
I built one to test it out and I don't think its preforming anywhere near the simulation. I didn't do a microphone measurement unfortunately, I took the box apart to check connections and never put it back together. If anyone has some insight of what might have gone wrong or how to simulate this enclosure more accurately your input would be greatly appreciated!
Here's a couple pictures:
After having this for a few months I thought what if I put all eight 6.5" woofers in one box of the same size? So I started messing around on cad and found that you can actually fit all 8 speakers in one box and still have room for a compression horn. This would mean that this single box would be as powerful as that original stack of 5
Here's the design and sim:
I only modeled it out as if there was one chamber with the total volume and all 8 speakers. I'm not sure how to simulate the two areas where the speakers are facing. The two side chambers are 4.5L each and the middle chamber is 8.8L. There are two 7/8" diameter circle ports that are .5" deep. (The middle camber is drawn with 3/8 wood but the actually box would be a half inch thick)
I built one to test it out and I don't think its preforming anywhere near the simulation. I didn't do a microphone measurement unfortunately, I took the box apart to check connections and never put it back together. If anyone has some insight of what might have gone wrong or how to simulate this enclosure more accurately your input would be greatly appreciated!
That is a bandpass box! There is no way such bandpass box to be linear up to 1 kHz according to your simulation, in the real world you have a huge gap in the frequency response between the bandpass box and the compression driver.
Stack of 4 "line array" boxes with double 6.5" midbass drivers will outperform the bandpass box with the same 8 drivers, in every imaginable way.
Stack of 4 "line array" boxes with double 6.5" midbass drivers will outperform the bandpass box with the same 8 drivers, in every imaginable way.
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