Lanzar OPTI1233D

12″ subwoofer · dual 1.3 Ω · 3,000 W RMS

Fs 52 HzQts 0.75Vas 0.53 ft³Xmax 0.61″

Recommended box

For a sedan, one sub, 3,000 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 volume1.06 ft³ (30 L)
Qtc0.92
Fc64 Hz
F3 (−3 dB, no cabin gain)54 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 13 13/16″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)33 Hz
Portslot 5 7/8 × 14 5/16″, 63 1/4″ long
Port velocity at 3,000 W64 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 27 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs52 Hz
Qts0.75
Qes0.908
Qms4.25
Vas0.53 ft³
Re (one coil)≈ 1.11 Ω
Sd≈ 76 in²
Xmax0.61″
EBP57 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.7 dB calc.

General

Size12″
Voice coilsdual 1.3 Ω
RMS power3,000 W

Mounting dimensions

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

“≈” 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 Lanzar 12″ models