Specifications

Building an Enclosure

To work properly, the walls of the enclosure must be rigid and not flex when subjected to high pressure

generated by the speaker's operation. For optimum performance, we recommend using 3/4" MDF (Medium

Density Fiberboard) and internal bracing. The enclosure should be glued together along with support of

screws or nails. Because MDF is porous, it is suggested that you seal the outside with polyurethane prior to

painting or carpeting.

Calculating Volume

Calculating is merely a matter of measuring the dimensions in inches, and using the following formula:

Box Volume = (Height) x (Width) x (Depth) divided by 1728. This will give you the volume of the box in cubic

feet.

If two facing sides are uneven length, add them together, and divide by 2 to take the average. Using this

number will give you the volume without the necessity of calculating the box in sections, and adding the

sections together. The thickness of the baffle material reduces the internal volume so this must be subtracted

from the outside dimensions to determine the internal volume. The amount of air displaced by each model is

listed on the specifications sheet in this manual and should also be subtracted from the gross volume

calculation. All box parameters include displacement for ports and subs. These specs do not include the

volume of the material used to build the box, so this must still be factored into the calculation.

Subwoofer Crossover

There are two operational types of crossovers, passive and active. Passive crossovers (coils and conductors)

are placed on the speaker leads between the amplifier and the speaker. An active crossover is an electronic

filter which separates the audio signal fed to different amplifiers. For optimum subwoofer performance, we

recommend using an active 80-100Hz low pass crossover at 12dB/octive.

Enclosures And Setup