Hi. I want to know if there will be any negative effects, if both ports of parralel 6th order bandpass are very close to each other. Idea is to use bandpass in sedan car, with both ports coming into the car through back seat. So both ports would be about 18-25mm close to each other (port kinda like a nose 😀), so basicaly one tunel with wall in center making it into two ports. Is this too close? Will they interfere? Every dB counts here so any negative effects by this extreme proximity would be bad 😡
Thanks in advance.
Thanks in advance.
The ideal situation is always as far apart as possible. The ports will likely fight each other. No idea... I've never tried it before. Give it a try and let us know how it works for you. 🙂
well, i've been building enclosures and doing installs since late 90's, and, save for instances where the speaker holes are utilized to save from cutting the sheet metal, most all rear-deck port-throughs are centralized. i have found, when you are comparing the small closed cabin space of automotive, vs the open room, vs the outdoor/large room environment, you take alot of what you know/learn about one environment, and throw it out the door when dealing with another. there are, some things that transfer over, but not a lot. come to think of it, i've practically never had a box impress me that was not central port. trunk build, or shared cabin. even one of the most impressive (when in shared cabin, but flunked in the trunk) was 2-side exit 6th order, however, the "2 ports" were actually one single port from the center shared chamber. when i do separate 4th order, i port in a way that the output of the ports converge before moving foreward. my 8th order 18cube crawl-through got insane, and you guessed it, the ports were central, and the subs aimed inward to converge everything at the final port....... i have done a bit of experimenting, and hadn't thought about it in years, but i have built near identical drop-in "boxes", driver and ports on the same baffle. all i can remember is deciding not to build another box with the ports outboard....... so, yes, i have tried many different configurations, but no, i have not made a central vs outboard port-through in identical cars with identical equipment and other parameters.... not sure if that answers anything, but the only thing i can see with outboard ports is you might get a drifting spl peak, depending on frequency, probably toward the center of the car, but i don't think it will make as much difference as deck vs ski-hole port placement.
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