Audiobahn ALUM15Q
15″ subwoofer · dual 6 Ω · 1,100 W RMS
The Audiobahn ALUM15Q is a 15″ subwoofer. With Qts 0.57 and EBP 39 it suits a sealed box: tight bass in a small enclosure; a ported box would need a lot of volume.
| 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, 1,100 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| Bass character (Qtc) | Tight and punchy · 0.90 |
|---|---|
| Fc | 39 Hz |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 12 3/8″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 2 9/16 × 16 11/16″, 29 1/8″ long |
| Port velocity at 1,100 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 17 11/16″ |
Deeper: 5.12 ft³ (145 L) tuned to 28 Hz, 31 1/2″ × 18 1/8″ × 23 3/16″ outside — a bigger box with flatter deep bass. Open in the calculator
Projects with this subwoofer
Boxes that users designed and published: plans, cut sheet and response graph.
Thiele/Small parameters
| Size | 15″ |
|---|---|
| Voice coils | dual 6 Ω |
| RMS power | 1,100 W |
| Fs | 24.4 Hz |
| Qts | 0.57 |
| Qes | 0.63 |
| Qms | 5.64 |
| Vas | 4.59 ft³ |
| Re (one coil) | 5.5 Ω |
|---|---|
| Sd | 131.8 in² |
| Xmax | 0.63″ |
| Vd | 83 in³ calc. |
| Mms | 335 g calc. |
| BL | 21.2 T·m calc. |
| EBP | 39 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 86.8 dB calc. |
Mounting dimensions
| Cutout diameter | 14″ |
|---|---|
| Mounting depth | 7 1/4″ |
| Overall diameter | 15 1/2″ |
“≈” 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
- web.archive.org/web/20060317162127/http://www.audiobahn.com/Audiobahn06/images/t
- web.archive.org/web/20050307032618/http://audiobahn.com/tech/2002/Sub%20Specs/Au
Other Audiobahn 15″ models
- Audiobahn ALUM15N 15″ · dual 6 Ω
- Audiobahn ALUM15X 15″
- Audiobahn AW150Q 15″
- Audiobahn AW150T 15″ · 4 Ω
- Audiobahn AW150XS 15″
- Audiobahn AW151T 15″ · 4 Ω
- Audiobahn AW152N 15″ · 4 Ω
- Audiobahn AW152T 15″
- Audiobahn AW1500N 15″
- Audiobahn AW1500Q 15″
- Audiobahn AW1500V 15″ · dual 4 Ω
- Audiobahn AW1500X 15″
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Kicker Solo-Baric L7S 15" 4-Ohm DVC (44L7S154) 3.67 ft³ sealed · 4.52 ft³ ported
- Kicker Solo-Baric L7R 15" 2-Ohm DVC (45L7R152) 3.71 ft³ sealed · 4.52 ft³ ported
- PSI Platform 2 15 D2 2.93 ft³ sealed · 3.57 ft³ ported
- Kicker Solo-Baric L7S 15" 2-Ohm DVC (44L7S152) 3.67 ft³ sealed · 4.52 ft³ ported
- Soundstream R1-15L 2.90 ft³ sealed · 3.78 ft³ ported
- MTX Audio 7515-22 3.18 ft³ sealed · 3.00 ft³ ported
FAQ
What box does the Audiobahn ALUM15Q need?
Recommended net volume: 3.00 ft³ sealed, 3.67 ft³ ported tuned to 30 Hz — for one sub in a sedan at 1,100 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Audiobahn ALUM15Q Thiele/Small specs?
Fs 24.4 Hz, Qts 0.57, Vas 4.59 ft³, Xmax 0.63″, Sd 131.8 in².
What is the Audiobahn ALUM15Q mounting depth?
Mounting depth is 7 1/4″, cutout diameter 14″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Audiobahn ALUM15Q handle and how do I wire it?
RMS power rating: 1,100 W. Dual 6 Ω voice coils: series gives 12 Ω, parallel gives 3 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.
Is the Audiobahn ALUM15Q better sealed or ported?
EBP 39: a sealed box (3.00 ft³) suits it best — tight bass in a compact enclosure. Ported is possible (3.67 ft³, tuned to 30 Hz) but larger.
What port does the Audiobahn ALUM15Q need?
For the 3.67 ft³ ported box tuned to 30 Hz: slot 2 9/16 × 16 11/16″, 29 1/8″ long, area 42.7 in²; or a round port Ø7 3/8″, ≈ 29 1/8″ long. Port air speed at 1,100 W: 63 ft/s.
What box do two Audiobahn ALUM15Q subs need?
Two subs need twice the volume: 6.00 ft³ sealed, or 7.35 ft³ ported at the same 30 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.