very simple question

[squeak9798 5,000+ posts]

with the exception of the spelling of role (not roll, as in 3rd paragraph)

I have no idea what you are talking about //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Flipx99 5,000+ posts]

I have no idea what you are talking about //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

It took me **** near two years but I got you....

As for OP, I would guide you to some of adire's tech articles but I dunno if you would read through them all. I thought I was smart until I read the article about woofer size, speed, and frequency. The company is iffy, but the article they have out here are pretty top notch. It take a new paradigm to understand how it works and I still don't completely understand.

You can go to adire's site if interested.

 

[cotjones 10+ year member]

It took me **** near two years but I got you....

As for OP, I would guide you to some of adire's tech articles but I dunno if you would read through them all. I thought I was smart until I read the article about woofer size, speed, and frequency. The company is iffy, but the article they have out here are pretty top notch. It take a new paradigm to understand how it works and I still don't completely understand.

You can go to adire's site if interested.

i'm confused you agree with me or him? who's OP?

 

[cotjones 10+ year member]

took ur advice and i know how to explain it.... i'm shure you know that a voice coil is an inductor, even i knew this... but the basic concept is that the longer an inductor coil is the slower its frequency response is because inductors try to maintain a specific current... and the bigger the coil the slower it changes currents because the coil itself resists that change... so if you had a 10 and a 15 with the same voice coil they would not have different frequency responce exept that it takes a larger coil to move a larger cone (the driver is not only moving the cone but also the air surrounding it.) so yeah if the motor's are the same between sizes you won't lose frequency but a 10 and a 13 with the same motor would be completlely idiotic... you would get more volume out of the 10 so you can't get around the fact that it is nessecary to have a slower responce from a larger sub in order for it to even maintain the same same volume as a smaller sub (at least when dealing with subs of the same series)

 

[squeak9798 5,000+ posts]

I'm impressed, and glad, you went and read up some on the topic. It's great that you want to actually learn (maybe you were just trying to prove me wrong...but either way, you're learning! //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif)

Your first couple sentences started out great....and it just went down hill from there.

I'm tired from shoveling snow, and don't really feel like typing. So I'll give you some "homework".

1) Lowpass cutoff frequency = Re/(2pi*Le)

NOTE: Le needs to be in H, not mH, so you need to divide the Le by 1000 if it's stated in mH

Dayton Reference 10HF

Dayton Reference 15HF

JBL GTO 1004

JBL GTO 1504

Notice anything?

(these are just a couple examples I found off hand in a couple minutes)

2) http://www.acoustic-visions.com/~acoustic/products/subwoofer_drivers/adire_tumult_15/

Look at the parameters relating to the motor (Re, Le, Bl, power handling)....what does comparing these tell you?

Also look at the sensitivity...since, according to you (if I'm understanding your "points" correctly), it should decrease as the diameter increases.