PSI Platform 2 18

18″ subwoofer · DVC · 1,500 W RMS

Fs 26.4 HzQts 0.60Vas 8.02 ft³Xmax 1.10″

Recommended box

For a sedan, one sub, 1,500 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 volume4.34 ft³ (123 L)
Qtc1.01
Fc45 Hz
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)31 1/2″ × 20 7/8″ × 15 1/16″
Open sealed box in designer

Ported

Net volume7.38 ft³ (209 L)
Tuning (Fb)33 Hz
Portslot 3 15/16 × 19 7/16″, 18 1/4″ long
Port velocity at 1,500 W64 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 20 7/8″ × 26 3/4″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.4 Hz
Qts0.60
Qes0.66
Qms6.55
Vas8.02 ft³
Re (one coil)3.9 Ω
Sd190.7 in²
Xmax1.10″
Vd210.2 in³ calc.
Mms343 g calc.
BL18.3 T·m calc.
EBP40 — suits sealed calc.
Sensitivity, 1 W / 1 m90 dB calc.

General

Size18″
Voice coilsDVC
RMS power1,500 W

Mounting dimensions

Ø18 1/2″cutout Ø16 3/4″mounting depth 9″magnet Ø≈ 10 7/8″
Cutout diameter16 3/4″
Mounting depth9″
Overall diameter18 1/2″

“≈” 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 PSI 18″ models