Audiobahn AW120T

12″ subwoofer · 4 Ω · 500 W RMS

32.4 HzFs, resonance

0.38Qts

1.59 ft³Vas

0.35″Xmax

500 WRMS

The Audiobahn AW120T is a 12″ subwoofer. With Qts 0.38 and EBP 77 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder. Modest excursion (Xmax 0.35″) — for clean sound at moderate levels, not for SPL competitions.

Source	web.archive.org · manufacturer data
Checked against source	October 2026
Thiele/Small parameters	complete
Mounting dimensions	3 of 4 — missing: magnet diameter; the designer will use an estimate

Recommended box

For a sedan, one sub, 500 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

smaller, tighter

0.64 ft³ (18 L)

Net volume

Bass character (Qtc)	Flat and accurate · 0.72
Fc	61 Hz
F3 (−3 dB, no cabin gain)	63 Hz
Example box (outside)	14 3/16″ × 14 3/16″ × 9 5/16″

Open sealed box in designer

Ported

deeper, louder

2.08 ft³ (59 L)

Net volume

Tuning (Fb)	35 Hz
Port	slot 1 15/16 × 14 5/16″, 25 3/16″ long
Port velocity at 500 W	64 ft/s
F3 (−3 dB, no cabin gain)	32 Hz
Example box (outside)	31 1/2″ × 15 3/4″ × 12 5/16″

Open ported box in designer

Deeper: 1.52 ft³ (43 L) tuned to 35 Hz, 31 1/2″ × 15 3/4″ × 10″ outside — a bigger box with flatter deep bass. Open in the calculator

Where to buy Amazon

Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Size	12″
Voice coils	4 Ω
RMS power	500 W
Fs	32.4 Hz
Qts	0.38
Qes	0.42
Qms	4.43
Vas	1.59 ft³

Re	3.25 Ω
Sd	69.8 in²
Xmax	0.35″
Vd	24.7 in³ calc.
Mms	154 g calc.
BL	15.6 T·m calc.
EBP	77 — sealed or ported calc.
Sensitivity, 1 W / 1 m	87.6 dB calc.

Mounting dimensions

Cutout diameter	10 7/8″
Mounting depth	5 3/8″
Overall diameter	12 1/2″

Where it fits in a vehicle

Spots from our vehicle guides where the cutout, mounting depth and recommended box fit. The spot sizes are approximate — measure your own vehicle.

Tacoma Access Cab — behind the front seats sealed box
Bronco 4-door — behind the rear seat sealed and ported box
Wrangler 4-door, hard top — behind the rear seat sealed and ported box
Wrangler 4-door, soft top — behind the rear seat sealed and ported box
Silverado / Sierra Crew Cab — under the rear seat sealed and ported box
Spare tire well sealed box
FJ Cruiser — behind the rear seat sealed and ported box
El Camino 1978–87 — behind the seat sealed and ported box
Cherokee XJ — cargo area, spare moved out sealed and ported box
Excursion — behind the third row sealed and ported box
Mustang 2015–2023 coupe — trunk sealed and ported box
Challenger / Charger — trunk sealed and ported box
Club Car Precedent — under the rear seat sealed box

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other Audiobahn 12″ models

Similar 12″ subwoofers from other brands

Close in Fs, Qts and Vas — a box of similar volume will suit them.

SoundQubed HDS2.212 D2 0.71 ft³ sealed · 2.33 ft³ ported
SoundQubed HDS2.212 D4 0.71 ft³ sealed · 2.33 ft³ ported
SPL Dynamics XTR-300D2 0.74 ft³ sealed · 2.40 ft³ ported
Kicker CompVX 12" 4-Ohm DVC (50CVX124) 0.74 ft³ sealed · 1.31 ft³ ported
Hertz Hi-Energy HX 300 D (DVC 4+4 ohm) 0.71 ft³ sealed · 1.24 ft³ ported
Deaf Bonce Apocalypse DB-SA2712 D1 0.71 ft³ sealed · 1.20 ft³ ported

FAQ

What box does the Audiobahn AW120T need?

Recommended net volume: 0.64 ft³ sealed, 2.08 ft³ ported tuned to 35 Hz — for one sub in a sedan at 500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.

What are the Audiobahn AW120T Thiele/Small specs?

Fs 32.4 Hz, Qts 0.38, Vas 1.59 ft³, Xmax 0.35″, Sd 69.8 in².

What is the Audiobahn AW120T mounting depth?

Mounting depth is 5 3/8″, cutout diameter 10 7/8″. The inside depth of the box must exceed the mounting depth by at least 1″.

How much power does the Audiobahn AW120T handle and how do I wire it?

RMS power rating: 500 W. Wiring for several subs and amp power — in the wiring calculator.

Is the Audiobahn AW120T better sealed or ported?

EBP 77: both work — sealed 0.64 ft³ is tighter and smaller, ported 2.08 ft³ tuned to 35 Hz is deeper and louder.

What port does the Audiobahn AW120T need?

For the 2.08 ft³ ported box tuned to 35 Hz: slot 1 15/16 × 14 5/16″, 25 3/16″ long, area 28.2 in²; or a round port Ø6″, ≈ 25 3/16″ long. Port air speed at 500 W: 64 ft/s.

What box do two Audiobahn AW120T subs need?

Two subs need twice the volume: 1.27 ft³ sealed, or 4.17 ft³ ported at the same 35 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.