AudioBahn Natural Sound Subwoofer AW1251T User Manual
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 #  
AW831T  
AW1051T  
AW1251T  
AW1571T  
Ported  
Air Space (Cu. Ft.)  
Port Size (Inches)  
0.7  
2 x 6.1  
12.77  
36  
0.65  
2 x 6.5  
33.45  
40  
1.3  
3 x 6.75  
27.15  
44  
1.7  
3 x 7  
28.15  
40  
Port Vel.  
-3dB  
(%)  
(Hz)  
Tune Freq. (Hz)  
Sub Disp. (Cu. Ft.)  
Port Disp.(Cu. Ft.)  
Total Vol. (Cu. Ft.)  
40  
40  
40  
35  
0.08  
0.009  
0.75  
0.1  
0.15  
0.024  
1.5  
0.21  
0.025  
2
0.01  
0.75  
Everyday Bass Performer  
Ported  
Air Space (Cu. Ft.)  
Port Size (Inches)  
1.15  
3 x 9  
6.26  
33  
1.4  
3 x 6.75  
16.75  
31  
2.3  
4 x 9  
14.18  
35  
2.65  
4 x 7.5  
16.74  
35  
Port Vel.  
-3dB  
(%)  
(Hz)  
Tune Freq. (Hz)  
Sub Disp. (Cu. Ft.)  
Port Disp.(Cu. Ft.)  
Total Vol. (Cu. Ft.)  
38  
39  
35  
35  
0.08  
0.033  
1.25  
0.1  
0.15  
0.06  
2.5  
0.21  
0.048  
3
0.024  
1.5  
Ultimate SPL Bass Box  
(not designed for competition use)  
Ported  
Air Space (Cu. Ft.)  
Port Size (Inches)  
1.9  
3 x 5.75  
5.81  
30  
2.4  
4 x 6.8  
9.96  
30  
3.15  
(2) 4 x 12  
7.56  
3.55  
(2) 4 x 11.25  
8.69  
Port Vel.  
-3dB  
(%)  
(Hz)  
30  
31.5  
Tune Freq. (Hz)  
Sub Disp. (Cu. Ft.)  
Port Disp.(Cu. Ft.)  
Total Vol. (Cu. Ft.)  
35  
39  
36  
35  
0.08  
0.02  
2
0.1  
0.15  
0.21  
0.04  
2.5  
0.166  
3.5  
0.152  
4
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  
96  
44  
42  
51  
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 #  
AW831T  
AW1051T  
AW1251T  
AW1571T  
Sealed  
Minimum (Cu. Ft.)  
Maximum (Cu. Ft.)  
0.25  
1
0.75  
2
1
2
1.25  
3.5  
SPL  
(dB)  
All sealed boxes already include the displacment for the subwoofer. NR = (Not Recommended)  
84.5  
83.8  
88  
89.2  
8

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