Resilient Sounds Platinum 18 D2
18″ subwoofer · dual 2 Ω · 2,000 W RMS · also as Platinum 18 D1 (dual 1 Ω)
The Resilient Sounds Platinum 18 D2 is a 18″ subwoofer. With Qts 0.37 and EBP 66 it works both sealed and ported: sealed is tighter and smaller, ported is deeper and louder.
| Source | resilientsounds.com · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 3 of 4 — missing: magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 2,000 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
smaller, tighter| Bass character (Qtc) | Flat and accurate · 0.69 |
|---|---|
| Fc | 51 Hz |
| F3 (−3 dB, no cabin gain) | 55 Hz |
| Example box (outside) | 20 1/16″ × 20 1/16″ × 13 7/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 4 1/8 × 19 7/16″, 37 11/16″ long |
| Port velocity at 2,000 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 20 7/8″ × 23 3/4″ |
Deeper: 4.52 ft³ (128 L) tuned to 31 Hz, 31 1/2″ × 20 7/8″ × 21″ outside — a bigger box with flatter deep bass. Open in the calculator
Projects with this subwoofer
Boxes that users designed and published: plans, cut sheet and response graph.
Thiele/Small parameters
| Size | 18″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 2,000 W |
| Fs | 27.2 Hz |
| Qts | 0.37 |
| Qes | 0.41 |
| Qms | 3.68 |
| Vas | 5.27 ft³ |
| Re (one coil) | 2 Ω |
|---|---|
| Sd | 179.4 in² |
| Xmax | 1.18″ |
| Vd | 211.8 in³ calc. |
| Mms | 435 g calc. |
| BL | 19 T·m calc. |
| EBP | 66 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 90.7 dB calc. |
Mounting dimensions
| Cutout diameter | 16 3/4″ |
|---|---|
| Mounting depth | 11″ |
| Overall diameter | 18 1/2″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 179.4 in².
“≈” 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
Voice coil versions
The same sub with different voice coils: the parameters are nearly the same — pick by your amp and wiring.
| Model | Voice coils | Re | Qes | Vas | Sealed | Ported |
|---|---|---|---|---|---|---|
| Resilient Sounds Platinum 18 D1 | dual 1 Ω | 1 Ω | 0.38 | 5.79 ft³ | 2.14 ft³ | 5.30 ft³ · 30 Hz |
| Resilient Sounds Platinum 18 D2 | dual 2 Ω | 2 Ω | 0.41 | 5.27 ft³ | 2.14 ft³ | 5.30 ft³ · 30 Hz |
Other Resilient Sounds 18″ models
- Resilient Sounds Platinum 18 V2 D1 18″ · dual 1 Ω
- Resilient Sounds Platinum 18 V2 D2 18″ · dual 2 Ω
- Resilient Sounds Team 18 D1 18″ · dual 1 Ω
Similar 18″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- SPL Dynamics SPL-460D2 1.92 ft³ sealed · 5.62 ft³ ported
- Fi Audio SP4 18v2+ D2 2.38 ft³ sealed · 5.54 ft³ ported
- Sundown Audio Xv2-18 D2 1.89 ft³ sealed · 4.34 ft³ ported
- SPL Dynamics SPL-460D1A 1.92 ft³ sealed · 5.65 ft³ ported
- Fi Audio SP4 18v2+ D1 2.38 ft³ sealed · 5.54 ft³ ported
- URAL Patriot 18 (2+2) 1.62 ft³ sealed · 5.33 ft³ ported
All 18″ subwoofers in our database →
FAQ
What box does the Resilient Sounds Platinum 18 D2 need?
Recommended net volume: 2.14 ft³ sealed, 5.30 ft³ ported tuned to 30 Hz — for one sub in a sedan at 2,000 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Resilient Sounds Platinum 18 D2 Thiele/Small specs?
Fs 27.2 Hz, Qts 0.37, Vas 5.27 ft³, Xmax 1.18″, Sd 179.4 in².
What is the Resilient Sounds Platinum 18 D2 mounting depth?
Mounting depth is 11″, cutout diameter 16 3/4″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Resilient Sounds Platinum 18 D2 handle and how do I wire it?
RMS power rating: 2,000 W. Dual 2 Ω voice coils: series gives 4 Ω, parallel gives 1 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.
Is the Resilient Sounds Platinum 18 D2 better sealed or ported?
EBP 66: both work — sealed 2.14 ft³ is tighter and smaller, ported 5.30 ft³ tuned to 30 Hz is deeper and louder.
What port does the Resilient Sounds Platinum 18 D2 need?
For the 5.30 ft³ ported box tuned to 30 Hz: slot 4 1/8 × 19 7/16″, 37 11/16″ long, area 80.4 in²; or a round port Ø10 1/8″, ≈ 37 11/16″ long. Port air speed at 2,000 W: 63 ft/s.
What box do two Resilient Sounds Platinum 18 D2 subs need?
Two subs need twice the volume: 4.27 ft³ sealed, or 10.59 ft³ ported at the same 30 Hz tuning with twice the port area. One shared chamber or one per sub — whatever fits your vehicle.