PP Slot Loaded Sub with Alpine SWR 12D2

Hi Y'all,

Here is the final version of the box drawings 3E. I added center bracing to the top and bottom boards, and increased the duct height in these areas respectively. I moved the driver closer to the mouth, about as far as it will go, as that seems to very slightly improve the smoothness of the SPL response. This one, or 3D - your choice. 🙂 Please, pick through it for errors.

Regards,
 

Attachments

Hi Y'all,

Here is the final version of the box drawings 3E. I added center bracing to the top and bottom boards, and increased the duct height in these areas respectively. I moved the driver closer to the mouth, about as far as it will go, as that seems to very slightly improve the smoothness of the SPL response. This one, or 3D - your choice. 🙂 Please, pick through it for errors.

Regards,

Tb46
You are quick.

Thanks
 
Finish

f pic1.jpg

f pic2.jpg


I did not test it yet but i played it a little. I am very surprise how this little box sound.It sound very full. I heard some funny sound coming from the driver, I don't know what it is but i will do some investigating tomorrow .
 
Last edited:
Hi Y'all,

Here is the final version of the box drawings 3E. I added center bracing to the top and bottom boards, and increased the duct height in these areas respectively. I moved the driver closer to the mouth, about as far as it will go, as that seems to very slightly improve the smoothness of the SPL response. This one, or 3D - your choice. 🙂 Please, pick through it for errors.

Regards,

Tb46
Everything looks good over here.

A o.k.jpg
 
View attachment 454577

View attachment 454578


I did not test it yet but i played it a little. I am very surprise how this little box sound.It sound very full. I heard some funny sound coming from the driver, I don't know what it is but i will do some investigating tomorrow .

You are fast! Looks very cool. I like the look and how it turned out. You made sure the cone isn't going to hit the magnet on the other driver right? It has a mean look to it. Bet it sounds nice. I hope that strange sound isn't the wired asymmetric cone motion I saw in the sims.
:cheers:
 
1214d QWP layout

Hi Everyone
Here here is a picture of the 1214d QWP layout

JBL_GTO1214 layout.jpg


@ Tb46 is this the way the cleats and bracings must be added to the cabinet. I am trying to get a better visual and understanding on how to apply the cleats and bracings.

cleat.jpg

Please see attached pic.
 
Last edited:
Hi lawbiding,

The mouth can be moved around from the bottom as drawn to the side(s), just maintain the same total area.

I'll attach a schematic w/ filling from the Hornresp Wizard, as always, this is only a starting point, you can add more or less to shape the response. The pictures has the total filling material weight: divide by 3, and use 1/3 between S1 and S2, and 2/3 between S2 and S3. Fluff up evenly, and keep it away from the cone.

Regards,
 

Attachments

  • GTO_1214_T_QWP_3E_long_L12_Wizard_Schematic_Filling.jpg
    GTO_1214_T_QWP_3E_long_L12_Wizard_Schematic_Filling.jpg
    16.9 KB · Views: 336
Last edited:
Hi lawbiding,

The mouth can be moved around from the bottom as drawn to the side(s), just maintain the same total area.

I'll attach a schematic w/ filling from the Hornresp Wizard, as always, this is only a starting point, you can add more or less to shape the response. The pictures has the total filling material weight: divide by 3, and use 1/3 between S1 and S2, and 2/3 between S2 and S3. Fluff up evenly, and keep it away from the cone.

Regards,[/QUOTE


Tb46
Honest I don't understand none of this ( The pictures has the total filling material weight: divide by 3, and use 1/3 between S1 and S2, and 2/3 between S2 and S3. Fluff up evenly, and keep it away from the cone) but I try to figure it out.
The area for mouth opening is 4 x 12 9/16 right.

Thanks
 
Correction of round port diameter.

Hi lawbiding,

Last night I was told to cut it short. 🙂 The diameter for the round hole is obviously larger ~ 7-3/4"Dia. Here is the most obvious way to get the port to the side, just turn the box. Let me know if you need anything else.

Regards,
 

Attachments

Last edited: