Building the Enclosure

ENCLOSURE VOLUME FLOWCHART

Measure maxim um possible dim ensions

Multiply wall thickness by 2

Subtract this from each dimension to arrive at Gross Internal Dimensions

Multiply LxW xD to arrive at

Gross Internal Volume

Deduct Vf (volum e of the speaker frame) from Gross Internal Volum e

Braces?

Yes

C alculate brace volum e and deduct from G ross Internal Volume

	To convert to LITERS :
You are at N et Internal Volum e	Divide in3	by 61 .03
You are at N et Internal Volum e
in cubic inches (in 3 )	To convert to C UBIC FEET:
	Divide in 3	by 1728

∙Determine the dimensions of your enclosure.

∙Be certain the box you have designed will fit into the location you have chosen. Sometimes making a cardboard box with the same outside dimensions is helpful.

∙Use 3/4 inch thick Medium Density Fiberboard (MDF) or High Density Particleboard. It is preferable to cut the wood with a table saw to ensure straight, even joints. If a table saw is not available, a circular saw is acceptable.

∙Use a “T” square to verify precise right angle gluing.

∙Use a high quality wood glue and air nails or wood screws to assemble the enclosure. Elmer’s® woodworker’s glue and Weldwood® work well. To guarantee an airtight box, seal each inside joint with silicone sealant.

∙For Sealed Enclosures, stuff the chamber with 50-75% filling (approximately 1.5 pounds per cubic foot) of fiberglass insulation or Dacron®.

∙For Vented Enclosures, staple 1 inch thick fiberglass insulation or Dacron to all walls of the enclosure except the baffle to which the woofer is mounted.

∙Use the supplied gasket to seal the woofer in the enclosure and eight(8) wood screws or T-nuts and bolts. Progressively tighten each of the bolts or screws to prevent warping the woofer frame.

∙Use slide-on connectors to attach speaker wires. Do not solder wires to the

SUGGESTED ENCLOSURES

The following designs include a variety of enclosure sizes and types. Each design has two frequency response curves; one showing predicted

“In-Car” response, and the other showing “Half-Space Anechoic” (out-of-car) frequency response. The performance difference between the two curves is a result of the natural acoustics of an “average” automotive environment. This “average” transfer function is only an approximation of what you may expect to see in your car. Every car is different. Each curve was generated using 2.0 Volts across both voice coils in parallel and measured at 1 meter. Also, each frequency response curve includes a 12 dB/octave low pass at 100 Hz. The response curves can help you visualize relative performance differences between designs. Read through the descriptions given for each enclosure and select the one that suits your needs.

Remember: all suggested enclosure volumes are Net, and DO NOT include woofer, port, and bracing displacement!