[jimbones]

Has anyone tried converting their H Frame OB Subs to sealed units? What was the result or what would you expect?

[mlundy57]

You can't just seal the box. The drivers and amps are designed for open baffle use. You'd have to change the drivers to the sealed version which is 4 ohms, Move the baffle to the front of the box (to get the proper air space), and change the amps to a model that can handle two 4 ohm drivers.

[nrenter]

Well...you could "just seal the box" but it may perform sub-optimally (see what I did there?) given it wasn't expressly designed to do so. Seal the back, measure, listen and report back.

 

[jimbones]

yea I ran a sim in Win ISD and it starts rolling off very early in a sealed enclosure. The drivers are SW12-08 and I thought that they would be 8 ohm but the spec sheet I have says 3 ohm.

[Hobbsmeerkat]

yea I ran a sim in Win ISD and it starts rolling off very early in a sealed enclosure. The drivers are SW12-08 and I thought that they would be 8 ohm but the spec sheet I have says 3 ohm.

You must have the older SW-12-08FR run by an HX300 amp
If you measure them with a multimeter, they should measure around 6-7ohms.
You likey have the spec sheet for the SW-12-04 if it says 3ohm.

[MarvinTheMartian]

Mike is right, The GR website is wrong and needs to be updated.
The individual GR-SW-12 TS parameters listed on the GR site are all identical copies of the GR-SW-12-04 specs.
I did find some ancient TS specs on the Rythmik that make more Qts sense.

http://www.rythmikaudio.com/GR_drivers.html

GR-SW-12 Model
        04      08FR  16FR
Encl  sealed open  open
fs      25      27.4   28.3  Hz
BL     13.7   11.2   14.7
Mms  138    112    108   g
VAS   100    100    100   L
Qms  4.30   3.20   2.80
Qts    0.32   0.75   0.85
Sd     490    490    490   cm2
Re       3      6.2      14    ohms
Xmax  16     16      16    mm


If you wanted to go sealed with the FR drivers, you are into huge infinite baffle boxes.
Think much bigger than a bread box more like a refrigerator.
Shawn

[VinceT]

Just curious why you would want to seal an OB sub?

You can always buy a sealed sub and blend it in I'm sure

[Hobbsmeerkat]

I'll work to update the product pages here soon

[jimbones]

Just curious why you would want to seal an OB sub?

You can always buy a sealed sub and blend it in I'm sure

I was just wondering if it worked sealed or vented. OB is the only way to go with these.
I need to experiment with positioning the subs, I dont seem to get much output from them so I am sure it is positioning.

[Danny Richie]

Looks like a copy and paste error.  We'll fix those parameters on the site.