aeroport help

[jfrost89 10+ year member]

I have 2 solo x 12s that are going to be ran off 2 kicker 2500s my box is going to be roughly 8.5 cu ft before displacement I want to tune it to 32 hz using 4" aeroports. The question is how many do I need and at what length these are going to be external ports coming out the top of the box with subs facing forward.

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[Flastrongman 10+ year member]

A LOT if you're stuck on 4". You'd be much better off running a couple 8" or 9" aero's.

 

[jfrost89 10+ year member]

I could do thast to. What your thoughts?

 

[Flastrongman 10+ year member]

Well I ran 2 9" ports for my 8cu box and cover 1 up for daily tuning.

 

[jfrost89 10+ year member]

Well I ran 2 9" ports for my 8cu box and cover 1 up for daily tuning.

Oh yeah I bought your amp lol im about to start my box but Ive never used areos before how long do you think they should be and what tuning would that be?

 

[kramer_212 10+ year member]

Well I ran 2 9" ports for my 8cu box and cover 1 up for daily tuning.

oh i was going to say 1 10 or 2 8s, but depends on what your after.

 

[Flastrongman 10+ year member]

I had the box tuned to 39hz with both ports open and 29hz with 1 open.

 

[Moble Enclosurs 10+ year member]

Just be careful with the multiple tuning ideas. It can backfire if the design gets smaller, because it will rely more on other factors to control output response. One may end up being much different than the other and can be unsatisfying if your sensitive to changes in audio. Its likely that most designs that are built that way do not account for proper characteristics of both ideas for tuning. But it is also more common that people are forgiving to these changes as well.

Just a thought for you if you want it done right, there is a better way for multituning.

As far as port area, send me an email or pm and I can get an exact area needed for the sub(s) mentioned. If you want more opinions, and other facts also that can help tremendously.

 

[Flastrongman 10+ year member]

Just be careful with the multiple tuning ideas. It can backfire if the design gets smaller, because it will rely more on other factors to control output response. One may end up being much different than the other and can be unsatisfying if your sensitive to changes in audio. Its likely that most designs that are built that way do not account for proper characteristics of both ideas for tuning. But it is also more common that people are forgiving to these changes as well. Just a thought for you if you want it done right, there is a better way for multituning.

As far as port area, send me an email or pm and I can get an exact area needed for the sub(s) mentioned. If you want more opinions, and other facts also that can help tremendously.

Well that sure seems like a nice way of telling me I did not know what the hell I was doing or was just guessing at the design for my last box.

 

[Moble Enclosurs 10+ year member]

Well that sure seems like a nice way of telling me I did not know what the hell I was doing or was just guessing at the design for my last box.

If that is how you feel, I don't know what to tell you. If you are offended by someone else with experience giving help, either constructive or instructive, then that is a personal problem of your own. I am not telling anyone you do not know what you are doing. I am pointing out cautious possibilities of doing something like that because they do exist. There is no personal reference to you. Is that understood?

If I want to reference you, or your work, I will quote you. My message was not quoted was it? Therefore, it had nothing to do with your knowledge or work. I do not know what design you did, nor how you created it, so I cannot and will not judge it without knowledge. It was not personal, and if it offended you, then you need to refocus the reason of why you were offended.

My point was, if you are to utilize such an idea, make sure it is correct because phase issues and other things will cause adverse effects in a lot of cases and a general listener may not pick up on the discrepancies. Simple as that. Understood?

 

[Loudmp5 10+ year member]

Lol sounded like he might have been joking about that post but if not good way to handle things:fro:

 

[Moble Enclosurs 10+ year member]

Well, I thought the same thing at first until the defense went up. Because normally, in a conventional design (where phase response is less sensitive), the parameters of the design will change and can be dramatic if done with multiple tuning without a removal of the displacement of the other port. Excrusion, phase, and timing effects will change, where the one with a higher tuning may be designed secondary to the lower tuning one to achieve at least a somewhat usable response down to the low 30s.

Essentially, to pull that off effectively (meaning with maintaining acoustic efficiency and output) without losing something of either one tuning idea, you would need to figure for those effects, and I know it can get complicated as far as the calculations go, unless you decide to rely on a program to do it for you, which I do not know of one that can....that I am aware of.

That is all the reason why I mentioned what I did. Because depending on what tuning you use, and what volume, placement, etc..all factors of the design, to pull that off with optimized output (not considering what one would consider just "usable" and "good enough"), then that can take some cautious planning and designing to achieve.

I have seen many times, others try to make a design with multiple ports, even with those that are removable, with sad results. And even some with usable results, but not one that has had both outputs equal in authority and passband response that was considered optimal. One will have a higher degree of distortion, and one will control the drivers excursion better.

ALl I was trying to say, was it can get pretty involved if you want it done right, so know how to do it and you will find yourself with great results.

Im not sure how that is offending anyone. Hmmmmm //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[jfrost89 10+ year member]

Come on guys theres no need to get all up in arms about box building I just need some ideas on what size ports, how long, and how many. I really didn't think it was going to cause a bunch of problems lol im sure you've both made plenty of boxes and good sounding systems so im just looking for some suggestions. Ive built alot of boxes just never used aeros and wanted to try something different.

 

[Moble Enclosurs 10+ year member]

No problem. I do apologize on my part for a lengthy explanation and rebuttal. Our focus is for you. Now, I cant give you that information right now to help because I am at work, but if you want to send me an email or pm with the driver information and dimensions you wanted to use etc, along with the information listed on this thread, I can look into figuring for a proper port area and such with my own calculations. If not, I'm sure someone may be able to give a more generalized response that may be fitting to your request. Either way, I hope we are able to help you soon.

 

[Flastrongman 10+ year member]

Just be careful with the multiple tuning ideas. It can backfire if the design gets smaller, because it will rely more on other factors to control output response. One may end up being much different than the other and can be unsatisfying if your sensitive to changes in audio. Its likely that most designs that are built that way do not account for proper characteristics of both ideas for tuning. But it is also more common that people are forgiving to these changes as well. Just a thought for you if you want it done right, there is a better way for multituning.

As far as port area, send me an email or pm and I can get an exact area needed for the sub(s) mentioned. If you want more opinions, and other facts also that can help tremendously.

Please enlighten.