AW1004J / AW1204J

OWNER’S MANUAL

Woofer Specifications

Aluminum Voice Coil Former

The voice coil former is black, anodized aluminum for highly efficient thermal transfer. This allows winding high temperature copper wire in multiple layers for improved efficiency. This allows improved power handling by effectively dissipating heat.

Spun Aluminum 1 Piece Cone

The spun aluminum 1 piece cone offers more stability than any other woofer before. This provides the necessary combination of weight and strength and allows high levels of output without cone failure and lower distortion. This type of cone also allows for tighter, more accurate response from the subwoofer.

EPDM Surround

The 1.75” EPDM surround is resilient to temperature variations and provides the consistent support necessary for the linear motion of the speaker cone. In addition, the inherent damping capabilities eliminate the transmission of sonic disturbances between the cone and the frame of the speaker. This greatly improves the clarity of the speakers frequency response.

Voice Coil

The 4-Layer, edge wound voice coil design of the speaker allows for a variety of impedance loads to be configured when matched with multiple subs. Please continue to the wiring diagram portion of this manual for possible configurations you can run. The Natural Sound subs have a dual 4 ohm voice coil operation.

Woofer Features

Flat Spider

The speaker linear compliance is balanced trough the use of a flat spider design. A flat spider provides symmetrical control of the voice coil through it’s cone excursion. Linear cone excursion reduces harmonic distortion for improved sound quality. This allows for reduced mechanical distortion for better sound quality.

Chrome Finish

Chrome has long been an industry standard in terms of durability in protective metal finishes. We have spared no expense in this area and not only is it a protective finish, but it is also a great addition to any plexi style enclosure.

Parameters

Le Mmd

Box Parameters

Audiobahn Box Specifications

All ports listed are circle ports unless otherwise stated. Surface area of a circle port = (3.14) X (radius) (squared)

Remember to build your box to the total volume, not just air space, as total volume includes all displacement.

Model # AW1004J AW1204J

Space Saver Bass Design

Ported

Air Space (Cu. Ft.)

Port Size (Inches)

Port Vel. (%)

-3dB (Hz)

Tune Freq. (Hz)

Sub Disp. (Cu. Ft.)

Port Disp.(Cu. Ft.)

Total Vol. (Cu. Ft.)

0.5

2 x 6.5

41.75

34

40

0.17

0.016

0.75

1.25

3 x 7.25

33.11

32

39

0.22

0.026

1.5

Everyday Bass Performer

Ported

Air Space (Cu. Ft.)

Port Size (Inches)

Port Vel. (%)

-3dB (Hz)

Tune Freq. (Hz)

Sub Disp. (Cu. Ft.)

Port Disp.(Cu. Ft.)

Total Vol. (Cu. Ft.)

1.3

3 x 8.25

19.3

30

36

0.17

0.03

1.5

2.25

4 x 8.50

18.21

29

36

0.055

0.22

2.5

Ultimate SPL Bass Box

(Not Designed for Competition)

Ported

Air Space (Cu. Ft.)

Port Size (Inches)

Port Vel. (%)

-3dB (Hz)

Tune Freq. (Hz)

Sub Disp. (Cu. Ft.)

Port Disp.(Cu. Ft.)

Total Vol. (Cu. Ft.)

2.3

4 x 9

11.2

28

35

0.17

0.058

2.5

3.15

(2) 4 x 12

9.19

28

35

0.22

0.179

3.5

A port velocity of 20% or under is good for everday use and 5% or under for SPL competition . Port velocity translates to port noise, so the lower the number, the less port noise you will incur.

An EBP of less then 45 is SUGGESTED for only a sealed box and greater then 65 for a ported box.

EBP 42 37

The larger a sealed box is, the lower the sub will play, but the less power it will handle. The smaller a sealed box is, the higher the frequency the sub will play, and the more power it will handle.

Model #

Sealed

Minimum (Cu. Ft.)

Maximum (Cu. Ft.)

SPL

0.5

1.25

0.5

1.5

(dB) 84.6

86.2

All sealed boxes already include the displacement for the subwoofer. NR = (Not Recommended)

ENCLOUSRE AND SETUP

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 12/dB/octive.

TROUBLESHOOTING

If you start having problems with distorted sound or loss performance after installing your subs, you can follow the instructions below to try and locate what is causing the problem.

1.

If you have any distorted sound, loss of performance, or rattling from your subs, check the connections running from your amplifier or other processor to the box. You will also want to check the connections inside the box to make sure no wires have become unhooked or are loose.

2.

If the above does not solve the problem, check your enclosure thoroughly to see if there are any leaks, cracks, or broken pieces. Any loss of structural integrity of your enclosure can cause significant performance loss and distortion.

3.

The next step you can take is to remove the subs and look for any burned wire leads or separated components. You can normally smell something burning when a sub blows or is going bad. Sometimes when you play subs to hard for too long, they will start to heat up.

4.

If none of the above steps solve the problem, you will want to start looking at the other components in the vehicle. Start by checking all connections to and from the box, amplifier, source unit, or any other processors you may be using. You will need to reference to that particular manufacturer for any setting configurations or troubleshooting.

UNIVERSAL SUBWOOFERS