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Home Mobile Electronics Project Bundles In an Afternoon HDS3.212-D2, U1-1500, and Amp Kit Bundle

HDS3.212-D2, U1-1500, and Amp Kit Bundle


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  • 1500 W RMS Power Rating (1 Ohm)
  • Full-range Output
  • Compact form factor: 6.7" x 8.9" x 2.5"
  • Charging system upgrades recommended

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This amp has a small footprint with big, full-range power output. Wired to a 1 ohm load, a HDS3.212-D2 subwoofer will handle the full 1500 W RMS output from the U1-1500 amplifier. This is the perfect 12-inch sub + amp combo if you’re looking to add some big, loud low end to your audio system. A 1/0 AWG amp wiring kit also comes with this bundle so you can hit the ground running with all the wiring and connections you need.

You will need an enclosure with the proper air space, mounting depth, and tuning for the HDS3.212-D2. If you’re using a pre-made enclosure, be sure to double check the specs so you don’t risk damaging your new 12 inch sub.

The 1/0 AWG amp kit included with this bundle gives you all the connections you’ll need including CCA power/ground wire, braided OFC RCA cable, remote turn-on wire, 250-amp fuse block, and wire loom. And of course, all the zip ties, grommets, rubber crimp sheaths, eyelets, and other connectors you’ll need to complete your installation.

This is the perfect project bundle if you want to jump into car audio with both feet. Aside from wiring the amplifier to the car’s charging system, you’ll also need an enclosure designed for these subwoofers. There are pre-made options available, but they’ll need to provide the correct amount of airspaceport area, and mounting depth for the HDS3.212. Of course these subs will require break-in to avoid damage and get the best performance.

The Dual 4 ohm coil configuration allows for wiring to a 1 ohm load to take advantage of the full power from your U1-1500 monoblock amplifier. For everyday music play, the U1-1500 is safe to run on most stock electrical charging systems. However, electrical upgrades are beneficial when you get above 1000 W RMS.

A 12-inch sub in an enclosure will take up a bit of cargo space, so plan ahead by knowing what space you can spare!

RMS Power350 W600 W600 W600 W600 W
Peak Power1000 W1200 W1200 W1200 W1200 W
Magnet Weight60 Oz100 Oz100 Oz100 Oz100 Oz
Coil Diameter2"2.5"2.5"2.5"2.5"
Coil Length28 mm36 mm40 mm40 mm40 mm
Woofer Size6.5"8"10"12"15"
F(s)45.39 Hz44.41 Hz33.6530.9526.92
ImpedanceD2 / D4D2 / D4D2 / D4D2 / D4D2 / D4
Z(max)33.8138.77 Ω65.6559.14 Ω56.79
V(as)3.264 L5.319 L17.43 L45.57 L100 L
L(e)1.498 mH5.394 mH5.7456.079 mH6.473
n(0)0.05%0.07673 %0.15860.3046 %0.3058
M(ms)93.7143.8 grams201.7209.2 grams333.1
C(ms)0.1310.089 mm/N0.1110.126 mm/N0.105
Sensitivity 1W/1m79.3280.9584.186.9486.95
Mounting Depth4.125"5.5"6.75"6.75"7.44"
Circle Cutout6.06257.5"9.31"11.25"13.875"
Sealed Enclosure (Cu Ft):.25-.5 FT³.35-.75 Ft³.5-1.0 FT³
.75-1.5 FT³
1.75-2.75 FT³
Ported Enclosure (Cu Ft):
.25-75 Ft³.75-1.25 FT³.75-1.25 FT³
1-1.75 FT³
3-6 FT³

Additional information

Weight 51 lbs
Test Voltage14.4V
Cont Wattage @ 4ohm400
Cont Wattage @ 2ohm800
Cont Wattage @ 1ohm1500
S/N Ration>100dB
Input Voltage Sensitivity8 - 0.2
Power Wire Gauge - In1/0
Speaker Wire Gauge - Out8
Diminesions (in)6.7 x 8.9 x 2.5
Dimensions (mm)170 x 225 x 65

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