SoundQubed HDS2.215 D4

15″ subwoofer · dual 4 Ω · 600 W RMS

Fs 26.9 HzQts 0.55Vas 3.53 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 600 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 volume2.90 ft³ (82 L)
Qtc0.83
Fc40 Hz
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12 1/4″
Open sealed box in designer

Ported

Net volume4.94 ft³ (140 L)
Tuning (Fb)28 Hz
Portslot 2 9/16 × 16 5/16″, 23 7/16″ long
Port velocity at 600 W62 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 21 7/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.9 Hz
Qts0.55
Qes0.608
Qms6.36
Vas3.53 ft³
Re (one coil)≈ 3.4 Ω
Sd127.7 in²
Xmax0.55″
Vd70.4 in³ calc.
Mms336 g calc.
BL17.8 T·m calc.
EBP44 — suits sealed calc.
Sensitivity, 1 W / 1 m87.1 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power600 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 7 7/16″magnet Ø≈ 9″
Cutout diameter13 7/8″
Mounting depth7 7/16″

“≈” 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 SoundQubed 15″ models