2 dad kmh 15 box help.

[jlmtx2002]

I am planning on running 2 Dad kmh 15's. I will be powering them with 1000w rms. I am having trouble with the box design on torres. Im looking for 6 cube net with a tuning of 32htz or close to it. My max dimensions are 36w,32h,18d. I really appreciate any and all help.

[Joe X]

Post your vehicle model and the driver displacement of that sub.

[jlmtx2002]

2012 Chevy silvarado crew cab. And displacement is .16

[Joe X]

Well, actually it would be best to have all sub parameters and I would think you have more than 36W, at 36W subs/port up is not an option, so subs up/port side is the suggestion, you should have 5" of free airspace in front of the port for it to work properly:

Enclosure Specifications:

Fb = 32.18 Hz

Vb = 6.05 ft^3

External Height = 27.25 in

External Width = 36 in

External Depth = 18 in

Port Width = 16 1/2 in

Port Height = 5 1/2 in

Cut Sheet List:

* All Dimensions in Inches.

* Wood Thickness is 3/4 for all Parts.

External Enclosure Parts:

2 x Top & Bottom (3 parts) = 36 x 18

Left & Right Sides =

Side 1 = 19 1/2 x 16 1/2

Side 2 = 25 x 16 1/2

Front & Back = 36 x 25

L Port Internal Assembly Parts:

Side to Side = 27 5/8 x 16 1/2

Here is the Torres project, copy the following and save it into a .txt file and open that with Torrres:

<?xml version="1.0" encoding="utf-8" standalone="yes"?>

<Data TextBoxData="MyData">

<xBoxHeight>27.25</xBoxHeight>

<xBoxHeight2></xBoxHeight2>

<xBoxWidth>18</xBoxWidth>

<xBoxDepth>36</xBoxDepth>

<xBoxDepth2></xBoxDepth2>

<xPortHeight>5.5</xPortHeight>

<xPortWidth>16.5</xPortWidth>

<xPortLength>28.375</xPortLength>

<xNumOfPorts></xNumOfPorts>

<xPortDiameter></xPortDiameter>

<xSubDisplace>.32</xSubDisplace>

<braceDisplace></braceDisplace>

<xBaffleThickness>.75</xBaffleThickness>

<xCommonWalls>3</xCommonWalls>

<numOfBaffles>1</numOfBaffles>

<externalPort></externalPort>

</Data>

Edited August 8, 2012 by Joe X

[jlmtx2002]

Damn that is exactly what I was looking for. And I am only using the 60 side of the the 60/40 split seat for the enclosure. And I talked with twistedchild420 and the owner of dad and they told me 6 cube. The subs are 500w rms with a fs of 27.6htz. Those are all the specs I have on them as of now. I will swing by there shop in a few hours to get more info. Thanks man.

[Twistedchild420]

Here are some T/S's if that would help

[jlmtx2002]

One question. Is the port area a little small. It looks like 13.6 to me. But I'm not real confident in my knowledge of what proper port area should be. From what I've read shouldn't it be around 15-16?

[Joe X]

A reliable method to determine port area would be the Richard Small's method, but I don't have Xmax for the driver and I could only estimate Sd (cone surface area), Using the mach method it gives around 56.5 square inches of port to stay within 5% of mach, at present is at 82.5.

I had to give 32W to prevent choking the port which is firing sideways but you need to let me know how wide I can go still having about 5" of free airspace in front of the port, if I can go wider, I can make a bigger port and still keep 6 cubes of net vol.

Edited August 8, 2012 by Joe X

[jlmtx2002]

Ok. With the port Where you have it placed it will be firing under the passenger side rear seat. From the rear driver side door(closed) I can use 36". So there is roughly 28" from the port to the rear passenger side door. But the seat prevents making the box any wider.

[Joe X]

Ok. With the port Where you have it placed it will be firing under the passenger side rear seat. From the rear driver side door(closed) I can use 36". So there is roughly 28" from the port to the rear passenger side door. But the seat prevents making the box any wider.

So the port firing below the backseat has plenty of free airspace in front of it.

I have changed the above suggestion to 36W, port area has gone up to around the 15 square inches per cube range.

The Torres savefile was also updated.