Crunch GTi104

10″ subwoofer · 4 Ω · 250 W RMS

Fs 35 HzQts 0.59Vas 0.88 ft³Xmax 0.37″

Recommended box

For a sedan, one sub, 250 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)
Qtc0.80
Fc47 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 5 15/16″
Open sealed box in designer

Ported

Net volume2.12 ft³ (60 L)
Tuning (Fb)30 Hz
Portslot 1 9/16 × 14 5/16″, 27 11/16″ long
Port velocity at 250 W54 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35 Hz
Qts0.59
Qes0.636
Qms8.22
Vas0.88 ft³
Re3.8 Ω
Sd54.7 in²
Xmax0.37″
Vd20.5 in³ calc.
Mms147 g calc.
BL13.9 T·m calc.
EBP55 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.3 dB calc.

General

Size10″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø10 1/4″cutout Ø9 1/8″mounting depth 3 1/2″magnet Ø≈ 5 15/16″
Cutout diameter9 1/8″
Mounting depth3 1/2″
Overall diameter10 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