AW105M / AW125M
OWNER’S MANUAL
Aluminum V
oice Coil Former
The voice coil former is black, anodized aluminum for highly efcient thermal transfer. This
allows winding high temperature copper wire in multiple layers for improved efciency. This
allows improved power handling by effectively dissipating heat.
Extended Pole Piece
The pole piece has been extended to provide a more linear magnetic eld for the operation
of the woofer. This lowers distortion and provides the woofer with better low frequency
response.
Vented Oversized Back Plate
The back plate has been stepped deeper to allow the woofer more excursion without bot-
toming out. Additionally, the back plate is vented with a radius aerodynamic back vent which
efciently and quickly circulates cool air around the voice coil. This allows for more excursion
and higher power handling without damaging the sub.
Voice Coil
The 4-Layer, edge wound voice coil design of the speaker allows for a variety of impedance
loads to be congured when matched with multiple subs. Please continue to the wiring dia-
gram portion of this manual for possible congurations you can run. The Natural Sound subs
have a dual 4 ohm voice coil operation.
Flat Spider
The speaker linear compliance is balanced trough the use of a at spider design. A at
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.
Woofer Introduction Woofer Features
Parameters Box Parameters
Model # AMV105M AMV125M
Fs 34.3Hz 33.11Hz
Vas 0.56 1.11
Qes 0.68 1.35
Qms 3.27 6.26
Vas (Liters) 30.78 liters 84 Liters
Vas (Cu. Ft.) 1.09 Cu.Ft. 2.96 Cu.Ft.
Re 3.3 ohms 3.54 ohms
Le 4.67 mH 1.07 mH
Mmd 108 Grams 90.68 grams
Xmax +/- 7mm +/- 7 mm
RMS 300 watts 350 Watts
Sd 0.034 M2 0.048 M2
Freq. Resp. 28Hz-1kHz 25Hz-1kHz
Efficiency 90.4dB 90.8dB
EBP 51 25
Depth 4 3/4" 5 1/16"
Hole 9" 10 7/8"
Diamater 10 1/4" 12 1/2"
Displacement 0.10 Cu. Ft. 0.15 Cu.Ft.
Audiobahn Woofer Parameters
Vas does not represent the volume of a Box. Vas is just a parameter used when calculating a box.
An EBP of less then 45 is SUGGESTED for only a sealed box and greater then 65 for a ported box.
Dimensions
Parameters Box Parameters
Model # AMV105M AMV125M
Ported
Air Space (Cu. Ft.) 0.625 1.3
Port Size (Inches) 2 x 6.75 3 x 7.75
Port Vel. (%) 31.5 21
-3dB (Hz) 36.5 35
Tune Freq. (Hz) 40 38
Sub Disp. (Cu. Ft.) 0.1 0.15
Port Disp.(Cu. Ft.) 0.011 0.028
Total Vol. (Cu. Ft.) 0.75 1.5
Ported
Air Space (Cu. Ft.) 1.3 2.25
Port Size (Inches) 3 x 8.0 4 x 8.5
Port Vel. (%) 15 12.5
-3dB (Hz) 30.5 30
Tune Freq. (Hz) 37 37
Sub Disp. (Cu. Ft.) 0.1 0.15
Port Disp.(Cu. Ft.) 0.029 0.055
Total Vol. (Cu. Ft.) 1.5 2.5
Ported
Air Space (Cu. Ft.) 2.33 3.2
Port Size (Inches) 4 x 8 (2) 4 x 10.5
Port Vel. (%) 8.75 6.5
-3dB (Hz) 29.5 29
Tune Freq. (Hz) 36 38
Sub Disp. (Cu. Ft.) 0.1 0.15
Port Disp.(Cu. Ft.) 0.053 0.141
Total Vol. (Cu. Ft.) 2.5 3.5
EBP
61 49
Model #
Sealed
Minimum (Cu. Ft.) 0.5 0.75
Maximum (Cu. Ft.) 1.25 2
SPL (dB) 85 88
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.
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.
All sealed boxes already include the displacement for the subwoofer. NR = (Not Recommended)
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.
Space Saver Bass Design
Everyday Bass Performer
Ultimate SPL Bass Box
(Not Designed for Competition)
AUDIOBAHN
UNIVERSAL SUBWOOFERS
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