Subwoofer box design, Need help!!

[Tnt78]

I want to build a box for 2 12" Down4sound DBz's. I have lots of experience working with wood, the problem I'm having is finding a proper blueprint. The box will be going in a 2003 Chevy s10 extended cab. The space available is 40"W x 22"H x 16"L. The specs on the subs are - RMS OUTPUT: 1300W RMS

COIL SIZE: 2.75 INCH

CUTOUT: 11.26 inches (286 mm)

MOUNTING DEPTH: 7.68 inches (195 mm)

NET WEIGHT: 32.8 lbs (14.9 kg)

GROSS WEIGHT: 36.4 lbs (16.5 kg)

XMAX : 28 mm (one-way)

MOTOR SIZE: 7.48 in - 190 mm | 3.74 inches (Radius)

Displacement: 0.15 cubic feet

Outside Diameter: 12.44 inches (316 mm)

Precision Engineering: Engineered with an optimized motor strength (BL Product: 29.119 T·m) and an effective piston area (Sd) of 59.093 cm² for powerful sound output at an affordable price.

 

Technical Specifications:

Revc (DC Resistance): 6.050 Ohm

Resonance Frequency (Fo): 35.012 Hz

Total Moving Mass (Mms): 330.724 g

Suspension Compliance (Cms): 62.480 µm/N

Equivalent Volume (Vas): 25.010 L

Sensitivity (SPL): 85.0 dB

Qms (Mechanical Q): 2.322

Qes (Electrical Q): 0.520

Qts (Total Q): 0.425

Mechanical Resistance (Rms): 0.763

Sealed Enclosure: 1.0 cubic foot

Ported Enclosure: 1.75 cubic feet

 

Any help would greatly be appreciated. 

Thank you!!! 

 

[Joe X]

For daily use 3.5 net with 50 square inches of port area, tuning 32-35 Hz, dual 0.75 layer baffle, strong cross bracing or window bracing.

 

BTW Sd is 540 cm² (not what they list)

[Loudsinglecab]

On 6/19/2025 at 1:47 AM, Tnt78 said:

I want to build a box for 2 12" Down4sound DBz's. I have lots of experience working with wood, the problem I'm having is finding a proper blueprint. The box will be going in a 2003 Chevy s10 extended cab. The space available is 40"W x 22"H x 16"L. The specs on the subs are - RMS OUTPUT: 1300W RMS

COIL SIZE: 2.75 INCH

CUTOUT: 11.26 inches (286 mm)

MOUNTING DEPTH: 7.68 inches (195 mm)

NET WEIGHT: 32.8 lbs (14.9 kg)

GROSS WEIGHT: 36.4 lbs (16.5 kg)

XMAX : 28 mm (one-way)

MOTOR SIZE: 7.48 in - 190 mm | 3.74 inches (Radius)

Displacement: 0.15 cubic feet

Outside Diameter: 12.44 inches (316 mm)

Precision Engineering: Engineered with an optimized motor strength (BL Product: 29.119 T·m) and an effective piston area (Sd) of 59.093 cm² for powerful sound output at an affordable price.

 

Technical Specifications:

Revc (DC Resistance): 6.050 Ohm

Resonance Frequency (Fo): 35.012 Hz

Total Moving Mass (Mms): 330.724 g

Suspension Compliance (Cms): 62.480 µm/N

Equivalent Volume (Vas): 25.010 L

Sensitivity (SPL): 85.0 dB

Qms (Mechanical Q): 2.322

Qes (Electrical Q): 0.520

Qts (Total Q): 0.425

Mechanical Resistance (Rms): 0.763

Sealed Enclosure: 1.0 cubic foot

Ported Enclosure: 1.75 cubic feet

 

Any help would greatly be appreciated. 

Thank you!!! 

 

If you decide to do a 4th order blow through I have a design for 2x12s I can send you for Freefitty bro...