SoundQubed HDX3-12 Series Subwoofers
SoundQubed HDX3-12 Series Subwoofers
SoundQubed HDX3-12 Series Subwoofers
SoundQubed HDX3-12 Series Subwoofers

SoundQubed HDX3-12 Series Subwoofers

Regular price$389.95

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The HDX3 series heavy-duty subwoofer is well suited for use as a competition subwoofer with a beefy, monstrous, made in the USA dual voice coil! Find it in 12 inch, 15 inch and 18 inch sizes!

The HDX3 can handle 1500 Watts RMS power and 4500 Watts Peak power for burps.

HDX3’s motor features a thick top plate, high motor force, and a tight gap for high-efficiency speaker design. A taller 4-spoke, cast aluminum frame makes room for a larger diameter spider for lower tuning and greater accuracy. The larger diameter spider’s new roll profile allows for low F’s without sacrificing power handling or control.

The HDX3’s taller and wider surround allows for even more precise excursion and new pulp-blend cones are stronger than previous fiberglass-laminate designs- And they’re lighter too!

We are ditching the stitching on the 1500 Watt Power Band.
Other improvements over the HDC series subwoofers include the presence of a thicker, more robust aluminum former, as well as black anodizing. Double slit venting and a higher temperature resin are included for increased cooling abilities, enhanced performance, and a longer subwoofer life.


  • 1500 Watt RMS, 4500 Watt Peak Power (Burps Only)
  • 3″ Voice Coil
  • Cast Frame
Model HDX312 HDX315 HDX318
RMS Power 1500 W  1500 W  1500 W
Peak Power 4500 W  4500 W  4500 W
Magnet Weight 300 oz  300 oz  300 oz
Coil Diameter 3"  3"  3"
Coil Length 50 mm  50 mm  50 mm
Usable Throw 68 mm  68 mm  68 mm
Woofer Size 12" 15" 18"
F(s) 26.92 Hz 26 Hz 27.59 Hz
Impedance D1 / D2 D1 / D2 D1 / D2
Z(max) 70.16 Ohm 63.8 Ohm 55.47 Ohm
Q(ms) 4.95 4.847 5.777
Q(es) 0.3409 0.3665 0.4724
Q(ts) 0.3189 0.3408 0.4367
V(as) 28.59 Liters 78.08 Liters 168.6 Liters
L(e) 2.553 2.711 2.563
n(0) 15.60% 33.96% 71.46%
M(ms) 440.9 grams 472.8 grams 410.9 grams
C(ms) 0.079 0.082 0.081
Sensitivity 1W/1m 84.03 dB 87.41 dB 90.64 dB
BL 31.45 30.49 25.14
Xmax 36mm 36mm 36mm
Sd 0.051 m2 0.082 m2 .121 m2
Displacement 0.16³ 0.18³ 0.23³
Mounting Depth 8 7/8" 9 1/2" 10.5"
Circle Cutout 11 3/8" 13 7/8" 16 9/16"
Ported Enclosure (Cu Ft): 1.75-2.75 FT³ 3-6 FT³ 5-7 FT³

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