Infinity Reference 1260W

12″ subwoofer · 4 Ω · 300 W RMS

Fs 23.5 HzQts 0.39Vas 2.93 ft³Xmax 0.51″

Recommended box

For a sedan, one sub, 300 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 volume0.88 ft³ (25 L)
Qtc0.80
Fc49 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 11 15/16″
Open sealed box in designer

Ported

Net volume2.90 ft³ (82 L)
Tuning (Fb)26 Hz
Portslot 1 9/16 × 14 5/16″, 26 7/8″ long
Port velocity at 300 W60 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs23.5 Hz
Qts0.39
Qes0.41
Qms6.99
Vas2.93 ft³
Re3.59 Ω
Sd82.3 in²
Xmax0.51″
Vd42.1 in³ calc.
Mms221 g calc.
BL16.9 T·m calc.
EBP57 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.2 dB calc.

General

Size12″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

Ø12 3/8″cutout Ø11 1/8″mounting depth 6 3/8″magnet Ø≈ 7 3/16″
Cutout diameter11 1/8″
Mounting depth6 3/8″
Overall diameter12 3/8″

“≈” 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 Infinity 12″ models