Lanzar OPTI1244D

12″ subwoofer · dual 4 Ω · 1,100 W RMS

Fs 40 HzQts 0.86Vas 0.75 ft³Xmax 0.59″

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

Net volume1.52 ft³ (43 L)
Qtc1.05
Fc49 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)14 15/16″ × 14 15/16″ × 16 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)31 Hz
Portslot 3 3/8 × 14 5/16″, 39 13/16″ long
Port velocity at 1,100 W62 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 18 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs40 Hz
Qts0.86
Qes1.037
Qms4.98
Vas0.75 ft³
Re (one coil)3.6 Ω
Sd≈ 76 in²
Xmax0.59″
EBP39 — suits sealed calc.
Sensitivity, 1 W / 1 m83.2 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power1,100 W

Mounting dimensions

Ø13″cutout ≈ Ø11 11/16″mounting depth ≈ 5 7/8″magnet Ø≈ 7 5/8″
Cutout diameter≈ 11 11/16″
Mounting depth≈ 5 7/8″
Overall diameter13″

“≈” 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 Lanzar 12″ models