Isobaric - less then $20

Status
Not open for further replies.
Didn't know you had a TH (or forgot); these are the speakers?

QTX Sound 6.5" Woofer with Kevlar cone 902.423

Did you look at them in WidISD? That shouldn't be hard.

btw, I think my Iso days are over, unless there is some great design out there that I'm missing out on.

I like the more efficient designs and the fact the amps run cooler. Using 6.5 woofers in a Iso might not work well also, just too small a cone to work with.
 
Did you look at them in WidISD? That shouldn't be hard.

btw, I think my Iso days are over, unless there is some great design out there that I'm missing out on.

I like the more efficient designs and the fact the amps run cooler. Using 6.5 woofers in a Iso might not work well also, just too small a cone to work with
yeah they're the woofers i have.
and i dont have widISD, i downloaded it once but just couldnt get to grips with it lol, if an isobaric isnt the way to go i'll do something else
 
I've been looking for places to tuck these away. This worked out well; pointing them down seems to enhance the bass a good bit.
 

Attachments

  • DSCN0009.jpg
    DSCN0009.jpg
    510 KB · Views: 253
I would try the WinISD again, sounds like you were almost there.....

If you put in too many parameters, you'll get error windows.

E.g. "Qes" in Driver Editor, leave that blank, let the program calculate it.

If you type in the box and the program disagrees, it goes crazy

If that does happens, simply try again.










yeah they're the woofers i have.
and i dont have widISD, i downloaded it once but just couldnt get to grips with it lol, if an isobaric isnt the way to go i'll do something else
 
I would try the WinISD again, sounds like you were almost there.....

If you put in too many parameters, you'll get error windows.

E.g. "Qes" in Driver Editor, leave that blank, let the program calculate it.

If you type in the box and the program disagrees, it goes crazy

If that does happens, simply try again.

ive given up on the diy box's for a while, but ive just bi-wired my q acoustics 2020 with some rega quattro cable, sounds even better now
 
Only difference betwen a home and car sub is that most people plan into the design the bass lift that occurs beelow about 80hz in most cars. It amounts to approx 12db per octave boost below a turnover frequency equal to tle longest dimension of the intreior of the cabin. Below this frequency the car exibits a pressure response.

What are your design goals?
 
More than some less than others (way less than others on here).

Most of the new subs supply plans or an example box.

Maybe one of the engineers will jump in and help you: what's the question?
im going to buy an infinity kappa 120.9w soon, i'll use it in my room for a few months but then put it in my car, so im after a nice box design lol
 
Only difference betwen a home and car sub is that most people plan into the design the bass lift that occurs beelow about 80hz in most cars. It amounts to approx 12db per octave boost below a turnover frequency equal to tle longest dimension of the intreior of the cabin. Below this frequency the car exibits a pressure response.

What are your design goals?
uum, tuned to 30hz, maybe lower if possible and i dont want a huge box ?
 
based on published specs with 4 ohm wiring an optimal sealed box has a f3 of 40 hz and a volume of 1.4 cubes.
A vented box of 2.96 cubes with a vent 4" by 17" will tune it to 23.78hz.
What sound goals do you have? loud!!! clean?
Do you want to wince every time a 30hz dubstep beat hits?
What vehicle?
How much power are you feeding this thing?
If you go vented the box will unload below tuning, id either keep the low tuning or go sealed.
The vented box will sound louder below 40 hz which is where most people like more oomph.
 
based on published specs with 4 ohm wiring an optimal sealed box has a f3 of 40 hz and a volume of 1.4 cubes.
A vented box of 2.96 cubes with a vent 4" by 17" will tune it to 23.78hz.
What sound goals do you have? loud!!! clean?
Do you want to wince every time a 30hz dubstep beat hits?
What vehicle?
How much power are you feeding this thing?
If you go vented the box will unload below tuning, id either keep the low tuning or go sealed.
The vented box will sound louder below 40 hz which is where most people like more oomph.
okay, so i'd like it to be clean sounding, but loud at the same time, i'd be using it in my room for some time untill i got a car and then it would go in the car, i'd give it 350watts rms, maybe slightly more depending on what amps are available
 
Status
Not open for further replies.