Magnat XTC-1500

15″ subwoofer · 4 Ω · 350 W RMS

Fs 30 HzQts 0.26Vas 4.10 ft³

Recommended box

For a sedan, one sub, 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 volume1.13 ft³ (32 L)
Qtc0.56
Fc65 Hz
F3 (−3 dB, no cabin gain)90 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 10 13/16″
Open sealed box in designer

Ported

Net volume2.37 ft³ (67 L)
Tuning (Fb)37 Hz
Portslot 1 9/16 × 16 5/16″, 17″ long
Port velocity at 350 W61 ft/s
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 11 9/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts0.26
Qes0.272
Qms6
Vas4.10 ft³
Re≈ 3.4 Ω
Sd≈ 124 in²
Xmax≈ 0.39″
EBP110 — suits ported calc.
Sensitivity, 1 W / 1 m92.6 dB calc.

General

Size15″
Voice coils4 Ω
RMS power350 W

Mounting dimensions

Ø15 7/16″cutout Ø13 7/8″mounting depth 7 1/16″magnet Ø≈ 9 1/16″
Cutout diameter13 7/8″
Mounting depth7 1/16″
Overall diameter15 7/16″

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 Magnat 15″ models