Soundstream T5.122

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

Fs 34.6 HzQts 0.62Vas 0.73 ft³Xmax 0.65″

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 volume1.13 ft³ (32 L)
Qtc0.80
Fc44 Hz
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 14 9/16″
Open sealed box in designer

Ported

Net volume2.83 ft³ (80 L)
Tuning (Fb)25 Hz
Portslot 2 15/16 × 14 5/16″, 58 11/16″ long
Port velocity at 1,000 W64 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 20 1/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34.6 Hz
Qts0.62
Qes0.685
Qms7.06
Vas0.73 ft³
Re (one coil)1.8 Ω
Sd81.5 in²
Xmax0.65″
Vd53 in³ calc.
Mms401 g calc.
BL15.1 T·m calc.
EBP51 — sealed or ported calc.
Sensitivity, 1 W / 1 m83 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,000 W

Mounting dimensions

Ø≈ 12 5/16″cutout ≈ Ø11 1/8″mounting depth 7″magnet Ø≈ 7 3/16″
Cutout diameter≈ 11 1/8″
Mounting depth7″

Cone area (Sd) calculated from Fs, Vas and Mms: 81.5 in².

“≈” 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 Soundstream 12″ models