Cabin gain

[Sguirrelfeather]

Is there a way, besides through expensive trial and error, to determine cabin gain for subs?

Click to read more...

 

[Boomin_tahoe 5,000+ posts]

Enclosure and the cabin's own acoustic environment is key. Maybe run some test tones for highest/loudest Hz. value. Obviously, the smaller the cabin area, the louder it will be.

What are you wanting to do/trying to accomplish?

 

[trumpet 5,000+ posts]

Does Anyone Understand Cabin Gain - Car Audio | DiyMobileAudio.com | Car Stereo Forum

 

[Sguirrelfeather]

Enclosure and the cabin's own acoustic environment is key. Maybe run some test tones for highest/loudest Hz. value. Obviously, the smaller the cabin area, the louder it will be.
What are you wanting to do/trying to accomplish?

Well, I'm trying to find out just how much my cabin is contributing to how my sub sounds. I have a t-line built by CSCStang, and am considering changing over to a ported enclosure, so the more knowledge, the better. I have a huge cabin...Ford Excursion. Based on some reading, I know it's going to be low, but just how low is the question. And I don't know if playing tones will help with a tuned box, would it? I mean, if the box is tuned to 38Hz, the box should tend to play that tone loudest. Unless I played them with the sub outside the truck and checked volume there then compared them all to being played inside the truck?

Trumpet, that was a lot of good info! Thanks! Unfortunately, a bunch of it went above my head. lol It's amazing how in depth some folks get with this.

 

[Boomin_tahoe 5,000+ posts]

t-line enclosure?! Funny, I just got done building one designed by him....and it's a 1st for me.

 

[hispls 5,000+ posts]

Is there a way, besides through expensive trial and error, to determine cabin gain for subs?

Model and build a simple .7 Q sealed box and put it in the vehicle. Meter your response and plot it on a graph. Anything above/below predicted is likely your cabin.... bear in mind that moving the box around and changing aiming will change things a bit too.

Typically you get a feel for the vehicle after building a few boxes, testing, and comparing what's on paper to what you observe.

 

[Papermaker85 5,000+ posts]

Is there a way, besides through expensive trial and error, to determine cabin gain for subs?

the REAL WAY to plot the cabins acoustic gain and resonance is pink noise and playing tones. to do that you first need to have a flat response with no cabin AKA free air.

typically we take a driver and put it in a sealed box that gives you a dampning of .707 then plot the frequency response outside the car and then plot it inside the car. its basically a matter of building a sealed box.

 

[ChaseinBass]

t-line enclosure?! Funny, I just got done building one designed by him....and it's a 1st for me.

What ??? You actually worked on your stereo and no pics ? Or did I miss them ?

 

[Papermaker85 5,000+ posts]

What ??? You actually worked on your stereo and no pics ? Or did I miss them ?

a tline for 2 15s is about 25 cubes. i doubt he could whip his ***. lol

 

[Boomin_tahoe 5,000+ posts]

a tline for 2 15s is about 25 cubes. i doubt he could whip his ***. lol

stfu and go work on your stupid prototype....you don't know wtf I'm even talking about.

 

[Boomin_tahoe 5,000+ posts]

What ??? You actually worked on your stereo and no pics ? Or did I miss them ?

no, not yet...in the middle of the build, kinda. Built enclosure for the single m3 8 I had sitting around.

 

[ChaseinBass]

Oh ok . Can't wait to see it !

Sent from my iPhone using Tapatalk

 

[Boomin_tahoe 5,000+ posts]

Oh ok . Can't wait to see it !

Sent from my iPhone using Tapatalk

Perhaps this will help...since PB isn't working for me anymore. http://www.caraudioclassifieds.org/forum/general-car-audio-discussion-questions/253274-1st-t-line-enclosure-build.html

 

[ChaseinBass]

I get no pics ? Why

Sent from my iPhone using Tapatalk

 

[Boomin_tahoe 5,000+ posts]

I get no pics ? Why

Sent from my iPhone using Tapatalk

You gotta log onto caco