Timpano TPT-T3500-12 D2
12″ subwoofer · dual 2 Ω · 3,500 W RMS
| Source | timpanoaudio.com · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | not in the spec sheet: Sd — typical value for the size used |
| Mounting dimensions | 0 of 4 — missing: cutout, mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 3,500 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 · 0.77 |
|---|---|
| Fc | 53 Hz |
| F3 (−3 dB, no cabin gain) | 52 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 10 1/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 39 9/16″ long |
| Port velocity at 3,500 W | 151 ft/s |
| F3 (−3 dB, no cabin gain) | 32 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 1/2″ |
At 3,500 W this example’s port will be noisy: air speed 151 ft/s, while the limit is 82 ft/s. It stays quiet up to about 1,000 W. Full power needs a port of at least 41.5 in², which means a bigger box than this example — size it in the designer.
Open ported box in designerDeeper: 1.98 ft³ (56 L) tuned to 30 Hz, 31 1/2″ × 15 3/4″ × 15″ 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 | 12″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 3,500 W |
| Fs | 35 Hz |
| Qts | 0.51 |
| Qes | 0.53 |
| Qms | 11.38 |
| Vas | 0.92 ft³ |
|---|---|
| Re (one coil) | 1.4 Ω |
| Sd | ≈ 76 in² |
| Xmax | 1.14″ |
| EBP | 66 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 85.3 dB calc. |
Mounting dimensions
| Cutout diameter | ≈ 11 1/8″ |
|---|---|
| Mounting depth | ≈ 5 7/8″ |
“≈” 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 Timpano 12″ models
- Timpano TPT-T1000-12 D4 12″ · dual 4 Ω
- Timpano TPT-T1500-12 D4 12″ · dual 4 Ω
- Timpano TPT-T2500-12 D4 12″ · dual 4 Ω
- Timpano TPT-TSUB12 D4 12″ · dual 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Swat EXE-P12D2 0.83 ft³ sealed · 1.20 ft³ ported
- Pride M.12 12 D2 0.67 ft³ sealed · 1.17 ft³ ported
- Triton Trooper T600 0.71 ft³ sealed · 1.17 ft³ ported
- Sundown Audio SA Classic 12 D4 0.60 ft³ sealed · 1.77 ft³ ported
- Diamond D912D4 0.74 ft³ sealed · 1.20 ft³ ported
- Diamond TDX12D4 0.76 ft³ sealed · 1.20 ft³ ported
FAQ
What box does the Timpano TPT-T3500-12 D2 need?
Recommended net volume: 0.71 ft³ sealed, 1.20 ft³ ported tuned to 34 Hz — for one sub in a sedan at 3,500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Timpano TPT-T3500-12 D2 Thiele/Small specs?
Fs 35 Hz, Qts 0.51, Vas 0.92 ft³, Xmax 1.14″.
How much power does the Timpano TPT-T3500-12 D2 handle and how do I wire it?
RMS power rating: 3,500 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.