Avatar SST-315 D2

15″ subwoofer · dual 2 Ω · 1,000 W RMS

Fs 35.3 HzQts 0.61Vas 2.40 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 1,000 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)
Qtc0.83
Fc48 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)32 Hz
Portslot 3 3/8 × 16 5/16″, 23 9/16″ long
Port velocity at 1,000 W65 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 21 15/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.3 Hz
Qts0.61
Qes0.679
Qms6
Vas2.40 ft³
Re (one coil)1.8 Ω
Sd≈ 124 in²
Xmax0.59″
EBP52 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.4 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,000 W

Mounting dimensions

Ø15 9/16″cutout Ø13 3/4″mounting depth 7 3/8″magnet Ø≈ 8 15/16″
Cutout diameter13 3/4″
Mounting depth7 3/8″
Overall diameter15 9/16″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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 Avatar 15″ models