New guy here subwoofer question

[EMF Audio]

Model what you had and then start playing with comparisons. You won't be modelling cabin gain, nor the effects of box position, but it will show you what changing gear will do. Blindly building boxes without understanding what the model will show you is crazy and ineffective.

If it's crazy and ineffective, why have I been so successful doing it for the last 10+ years? You can model things I know the exact results of and it's VERY different. Perfect example, my van. Plug everything in and model it, it shows about 2 dB gain at 34 hz. What does it actually do? Well 2 15's do 162's @ 54 hz so I think the gain is off, and the frequency certainly is.

 

[Deephaven]

Re-read what I said. It will surely show you a relative difference.

 

[EMF Audio]

Re-read what I said. It will surely show you a relative difference.

It won't show you anything accurate, which is the point of it. What it would model would be as close as me drawing on paper saying "it will look like this". I literally have a better idea of how something is going to sound by taking a sub and building a box out of my head than what would model.

The model is based off of t/s parameters, which are measured at a fraction of a millimeter of excursion. You get it moving, everything changes.

 

[Deephaven]

I literally have a better idea of how something is going to sound by taking a sub and building a box out of my head than what would model.

For you it literally makes more sense to arbitrarily decide, got it. Carry on.

 

[EMF Audio]

For you it literally makes more sense to arbitrarily decide, got it. Carry on.

I'm sorry I understand audio and don't try to justify things to myself with graphs, and it offends people.

I'm at the point now, I build a box to a car, then build a sub to the box.

 

[Deephaven]

Arbitrary is NOT understanding, lol. Keep doing what you do though, I can see you are "open" to learning.

 

[EMF Audio]

Arbitrary is NOT understanding, lol. Keep doing what you do though, I can see you are "open" to learning.

You apparently don't understand sarcasm either. I am open to learning, but what's being said isn't learning, it's things I learned are wrong a decade ago. I'm putting effort into educating, so people don't think those programs give real results.

 

[Deephaven]

They absolutely do. Just like your MAF sensor reads air flow. Of course if you change the environment like making your intake tubing larger the calibration on the maf changes. Cabin gain is similar and requires a calibration. Modeling software is absolutely the best place to start. And just because you know how much output your sub will have via software does not mean it is calibrated to your cabin but starting to tune by guessing an arbitray maf calibration is equally insane.

 

[EMF Audio]

So where is it exactly that you get all the data on the vehicle to plug in? You find the database with all your transfer function data at the SPL you're achieving? After all, the dynamics of the vehicle change with output. Your overall response in the vehicle changes with pressure. So please, tell me where you plug in all your vehicle data for it to map that out. I don't mean where it says this SPL and this frequency, I mean where the common person can just plug that in and go to town.

 

[Deephaven]

Where do you get that with a maf in a custom intake? Both cases you have to start somewhere to shorten the tuning time. Winisd and the like are just as exact in free field as a maf sensor starting point is. Crazy to not start with some known.