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Home Mobile Electronics Project Bundles All Day HDS2.215-D4, S1-850, Q-AK-4 + Enclosure Kit Bundle

HDS2.215-D4, S1-850, Q-AK-4 + Enclosure Kit Bundle


Lease-to-own for as low as $0/week. Get Started

  • Single channel
  • 900 Watts RMS @ 1 Ohm
  • Class D
  • 1 Ohm stable
  • 4 AWG power inputs

In stock

Single 15-inch Ported Enclosure Kit
1 × Subwoofer DIY Enclosure Kits - Single, 15"

Out of stock

SKU: HDS2.215-D2-S1-850-AK4-EKS115 Categories: , ,


This is a perfect package for big bass on a budget. With a powerful sound, you might now thinku this bundle will run on a stock electrical system. Wired at 2 ohm, you’ll have plenty of room to grow if you decide to add a second D4, or swap it for a D2 to get more power flowing from the S1-850 monoblock amplifier.

Aside from the amp & subs, you also get a killer enclosure kit! Designing a high performance sub enclosure isn’t simple. We’ve done all the math and testing for you. Each kit includes 13-ply birch panels, terminal cups, screws, and instructions.

Your Box, Your Way

If you don’t have many tools, or woodworking experience, a flat pack subwoofer box kit is a great way to learn by doing. We’ve taken the trouble out of finding high quality material along with the frustration of shoddy big box store saw cuts.

With a few basic tools, you can assemble this sub box kit in less than an hour. First, align your panels to drill pilot holes. Then, just glue it and screw it! While the glue dries, run all your wires. Get some rest, and wake up to a new way of listening to music!

CNC precision pre cut panels fit together perfectly making for easy, accurate assembly. Maximum glue area means a superb bond at each joint. The panels are also labeled for easy identification. Pre-drilled pilot holes help you complete the pilot holes into the joining panel edge for perfect alignment.

Rather than using knock down joinery, these flatpack kits are meant to be solid once assembled. Don’t be shy with the glue! Along with providing the actual strength of the joint, glue acts as a seal to eliminate pesky air leaks.

ClassClass D
Channels1 channel
Working Voltage8.5 V - 16 V
Maximum Amperage90
Power @ 4 Ohm 14.4V375 Watts RMS
Power @ 2 Ohm 14.4V625 Watts RMS
Power @ 1 Ohm 14.4V900 Watts RMS
Frequency Response10 Hz - 200 Hz
S/N RatioGreater than 80
Damping FactorGreater than 100
Input Sensitivity5 V - 0.15 V
Subsonic Filter10 Hz - 50 Hz
Low-Pass Filter20 Hz - 200 Hz
Dimensions in (LxWxH)9.8 x 7.8 x 2.2
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

 Single 8"Single 10"Single 12"Single 15"
Tuning frequency (Hz):35 Hz37 Hz35 Hz
Circle cutout diameter:9.31 In11.25 In13.875 In
Dimensions (L×W×H)24" X 16" X 12"19" X 26" X 14"20.25" X 30" X 17"
Gross Volume:2.04 FT³3.3 Ft³4.79 Ft³
Net Volume:1.67 FT³2.68 Ft³3.66 Ft³
Material13-ply Baltic Birch Plywood13-ply Baltic Birch Plywood13-ply Baltic Birch Plywood13-ply Baltic Birch Plywood