Audio System R 15 FA

15″ subwoofer · 4 Ω · 450 W RMS

Fs 22.9 HzQts 0.52Vas 7.42 ft³Xmax 0.35″

Recommended box

For a sedan, one sub, 450 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

Net volume2.83 ft³ (80 L)
Qtc0.99
Fc44 Hz
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 11 3/4″
Open sealed box in designer

Ported

Net volume4.84 ft³ (137 L)
Tuning (Fb)32 Hz
Portslot 1 15/16 × 16 11/16″, 13″ long
Port velocity at 450 W63 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 19 3/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs22.9 Hz
Qts0.52
Qes0.57
Qms5.9
Vas7.42 ft³
Re3.2 Ω
Sd124.6 in²
Xmax0.35″
Vd43.2 in³ calc.
Mms211 g calc.
BL13 T·m calc.
EBP40 — suits sealed calc.
Sensitivity, 1 W / 1 m88.5 dB calc.

General

Size15″
Voice coils4 Ω
RMS power450 W

Mounting dimensions

Ø15 7/16″cutout Ø14 3/16″mounting depth 7 11/16″magnet Ø≈ 9 3/16″
Cutout diameter14 3/16″
Mounting depth7 11/16″
Overall diameter15 7/16″

“≈” 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 Audio System 15″ models