Eros E-18 SDS 2.7K

18″ subwoofer · 4 Ω · 1,350 W RMS

Fs 34.1 HzQts 0.32Vas 7.66 ft³Xmax 0.47″

Recommended box

For a sedan, one sub, 1,350 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 volume1.70 ft³ (48 L)
Qtc0.75
Fc80 Hz
F3 (−3 dB, no cabin gain)81 Hz
Example box (outside)19 11/16″ × 19 11/16″ × 11 11/16″
Open sealed box in designer

Ported

Net volume4.34 ft³ (123 L)
Tuning (Fb)43 Hz
Portslot 3 9/16 × 19 1/16″, 15 11/16″ long
Port velocity at 1,350 W65 ft/s
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)31 1/2″ × 20 1/2″ × 17 3/8″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34.1 Hz
Qts0.32
Qes0.331
Qms9.14
Vas7.66 ft³
Re2.8 Ω
Sd186 in²
Xmax0.47″
Vd87.9 in³ calc.
Mms205 g calc.
BL19.3 T·m calc.
EBP103 — suits ported calc.
Sensitivity, 1 W / 1 m96.2 dB calc.

General

Size18″
Voice coils4 Ω
RMS power1,350 W

Mounting dimensions

Ø≈ 17 11/16″cutout ≈ Ø16 9/16″mounting depth ≈ 8 1/4″magnet Ø≈ 10 3/4″
Cutout diameter≈ 16 9/16″
Mounting depth≈ 8 1/4″

“≈” 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