American Bass VFLCOMP-1822

18″ subwoofer · dual 2 Ω · 5,000 W RMS

Fs 32.9 HzQts 0.50Vas 3.11 ft³Xmax 1.08″

Recommended box

For a sedan, one sub, 5,000 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 volume2.12 ft³ (60 L)
Qtc0.78
Fc52 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)19 11/16″ × 19 11/16″ × 13 7/8″
Open sealed box in designer

Ported

Net volume6.32 ft³ (179 L)
Tuning (Fb)29 Hz
Portslot 5 7/8 × 19 1/16″, 47 13/16″ long
Port velocity at 5,000 W81 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 20 1/2″ × 31 1/2″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.9 Hz
Qts0.50
Qes0.554
Qms4.94
Vas3.11 ft³
Re (one coil)≈ 1.7 Ω
Sd173.4 in²
Xmax1.08″
Vd187.7 in³ calc.
Mms471 g calc.
BL17.3 T·m calc.
EBP59 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.5 dB calc.

General

Size18″
Voice coilsdual 2 Ω
RMS power5,000 W

Mounting dimensions

Ø≈ 17 11/16″cutout Ø16 9/16″mounting depth 11 3/8″magnet Ø≈ 10 3/4″
Cutout diameter16 9/16″
Mounting depth11 3/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 173.4 in².

“≈” 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 American Bass 18″ models