Pride T V.3 18 D1

18″ subwoofer · dual 1 Ω · 2,500 W RMS

Fs 27 HzQts 0.34Vas 4.24 ft³Xmax 1.30″

Recommended box

For a sedan, one sub, 2,500 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 volume1.92 ft³ (54.5 L)
Qtc0.61
Fc48 Hz
F3 (−3 dB, no cabin gain)60 Hz
Example box (outside)19 11/16″ × 19 11/16″ × 12 7/8″
Open sealed box in designer

Ported

Net volume3.46 ft³ (98 L)
Tuning (Fb)31 Hz
Portslot 3 3/4 × 19 1/16″, 50 5/16″ long
Port velocity at 2,500 W65 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 20 1/2″ × 19 13/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27 Hz
Qts0.34
Qes0.36
Qms6
Vas4.24 ft³
Re (one coil)≈ 0.85 Ω
Sd180.6 in²
Xmax1.30″
Vd234.6 in³ calc.
Mms557 g calc.
BL14.9 T·m calc.
EBP75 — sealed or ported calc.
Sensitivity, 1 W / 1 m90.2 dB calc.

General

Size18″
Voice coilsdual 1 Ω
RMS power2,500 W

Mounting dimensions

Ø≈ 17 13/16″cutout Ø16 5/8″mounting depth 10 3/8″magnet Ø≈ 10 13/16″
Cutout diameter16 5/8″
Mounting depth10 3/8″

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 Pride 18″ models