Joe X

The specs say 1-2 cubic feet of gross volume so you are on spec on the tight side, it would be best if you posted your max external dims to get a better idea of what can be done.

To do the shared port design I would need an extra inch deep thats all.

Ported makes your bass deeper, if it was for the 3 dB gain only I'd say maybe is not worth it.

A shared port design will require some more space than 15x30x15.

What subs are going in??

You will get louder and deeper bass with a ported enclosure. The center divider becomes necessary if you are using one amplifier per sub, when the output of the amplifiers is not exactly the same power will be lost without the center divider. If you want a sealed enclosure with a center divider anyways they are sold prefabricated just make sure are 1.25 cubic feet per chamber.

Hope you mean Pioneer TS-W303R Here is the suggestion: Enclosure Specifications: Fb = 36.033 Hz Vb = 2.454 ft^3 Subwoofer Mounting = Front Mounted External Height = 15 in External Width = 30 in External Depth = 15 in Port Width = 2 1/4 in Cut List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: Front = 27 x 13 1/2 Back = 30 x 13 1/2 Left & Right Sides: Side 1 = 14 1/4 x 13 1/2 Side 2 = 13 1/2 x 13 1/2 Top & Bottom = 30 x 15 L Port Internal Assembly Parts: Front to Back = 11 1/4 x 13 1/2 Extension = 5 x 13 1/2 Here is an assembly guide:

The port does bend so you need to know how to get the physical length of the port, also bracing (specially for the port) and a double baffle seem in order, may be possibe to come up with something more functional, what subs are going in??

Those are specified at 1.25 cubic feet per sub so 2.5 cubic feet net internal volume is what you require. Aero ports would be the easy way to reach the rear deck.

Post your maximum dims and I will submit a design suggestion.

The sub displacement is .071 according to http://support.alpin...M_SWR-1242D.PDF I was looking at the current Type R 1243.. just make sure you have the old one.

You changed the driver displacement to a wrong value it should be 0.2 cubic feet as before.

Just a few notes, the shared port is twice as thick on the center duct than in it is on the lateral ducts, you don't need the double baffle on this design but if you want to do it then add 0.75 to the depth so you don't go low on internal volume, you need 1.5 cubic feet per sub of net internal airspace (you are low). The T parts you added to the port reduce port area, I believe are not necessary. you need to set common walls to 2, set baffle thickness to 0.75 if you are adding the extra layer.

You can also look at obsidian, sundown on the price range.

Optimal is 0 degrees of phase or no delay between drivers, there will be some loss by firing at 90 deg of each other. anyhow firing upwards inside a vehicle with trunk is just a no go regarless of cancellation.

To answer your question, I don't see how placing some of the subs upwards can help, but there are other things to check,for example assuming a 36Hz tuning you would have each sub with 0.73 cubic feet of airspace each their range is 0.6-1 cubic feet so you would be on the tight side, you need to be running them with at least true 1600W RMS (400W each) to get what they give. You can safely run them to 500W each. Also you need 1880W or clean 134 A to properly run them on rated power, yor gains, your tuning, have an effect also....

The SSD15 is 1000W RMS and a better sub for the price.

You say you have subs and port on the same face and most of the times that's best, the better way to give feedback is listing the specs of your box and your equipment, and the vehicle you are using.

Yes you can it's just PVC pipe: http://www.lowes.com...ld|1&facetInfo= To get better results just sand the ends of the pipe so that there are no sharp edges and you are done. If you are into spending a lot you can buy flared ports: http://www.parts-express.com/pe/showdetl.cfm?Partnumber=268-352

Take a look at their suggestion tuned to 34Hz you need to look no further: 4.5ft3 2(4” ports x 10 ¾” long) (34Hz) F3=37Hz 1000w Here an idea of how it can be implemented: So, here are some specific dimensions you can build (4.5 cubic feet gross) : Enclosure Specifications: Vgross = 4.5 ft^3 (per chamber) Subwoofer Mounting = Flush Mounted External Height = 17.5 in External Width = 51.5 in External Depth = 22 in Cut List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: 2 x Front & Back (3 parts) = 51 1/2 x 17 1/2 Left & Right Sides + Center Divider (3 parts) = 19 3/4 x 16 Top & Bottom = 51 1/2 x 19 3/4 Port Quantity and Dimensions (per chamber): Number of Ports = 2 Aero Port Diameter = 4 Aero Port Length = 10 3/4 This will work and is easy to build.

By doing that you have made the port longer and therefore lowered your tuning. I would need to know the driver displacement for those subs.. to do something.

Are these you EXTERNAL dimensions?? 54W 21.5D 17.5H If so here is a design suggestion for a box with a center divider and tuned to 36 Hz, sub displacement is assumed to be 0.23 cuft (same layout as yours): Enclosure Specifications: Fb = 36,067 Hz Vb = 3,406 ft^3 (per chamber) Subwoofer Mounting = Front Mounted External Height = 17,5 in External Width = 54 in External Depth = 21,5 in Port Width = 3 1/8 in (one port per chamber) Cut List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: Front & Back = 54 x 17 1/2 Left & Right Sides + Center Divider (3 parts) = 20 x 16 Top & Bottom = 54 x 20 L Ports Internal Assembly Parts (2 of each) : Front to Back = 16 7/8 x 16 Extension = 1 1/2 x 16

The SDC2.5 are very different to the HDC3s still 33-35 would have been probably more like it, for the HDC3 35-38 will sound much louder. For a 33 tuning just change this: L Port Internal Assembly Parts: Front to Back = 17 3/4 x 15 1/2 For higher tuning a redesign is needed because of port area per cubic feet goes below recommendation.

4-4.5 cubic feet per sub for the 15"s and 5-6 cubic feet per sub for the 18"s is Audioque suggestion, if seriously overdriving somewhat lesser volumes are recommended.

Ok so the AQ SDC2.5 work best on 4-4.5 cuft per sub and 14-15 sqin/cuft so you are low, here is a design suggestion on your space: Enclosure Specifications: Fb = 32,351 Hz Vb = 7,67 ft^3 Subwoofer Mounting = Flush Mounted External Height = 17 in External Width = 38 in External Depth = 30 in Port Width = 6 in Cut List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: Front = 31 1/4 x 15 1/2 Front Internal = 30 1/2 x 15 1/2 Back = 38 x 15 1/2 Left & Right Sides: Side 1 = 28 1/2 x 15 1/2 Side 2 = 27 3/4 x 15 1/2 Top & Bottom = 38 x 30 L Port Internal Assembly Parts: Front to Back = 19 1/2 x 15 1/2 For your type of vehicle is recommended subs/ports in the same face front or rear firing so both should be tried. Here is an assembly guide (generic dimensions):