Pioneer TS-300D4
12″ subwoofer · dual 4 Ω · 400 W RMS
| Source | pioneer-car.eu · 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, 400 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) | Boomy, with a bump · 1.12 |
|---|---|
| Fc | 43 Hz |
| F3 (−3 dB, no cabin gain) | 34 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 1/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 25 3/4″ long |
| Port velocity at 400 W | 52 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 12 3/4″ |
Deeper: 3.07 ft³ (87 L) tuned to 33 Hz, 31 1/2″ × 15 3/4″ × 15 3/8″ 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 4 Ω |
| RMS power | 400 W |
| Fs | 27 Hz |
| Qts | 0.69 |
| Qes | 0.73 |
| Qms | 14.29 |
| Vas | 2.84 ft³ |
| Re (one coil) | 4.5 Ω |
|---|---|
| Sd | 79.8 in² |
| Xmax | 0.40″ |
| Vd | 31.7 in³ calc. |
| Mms | 162 g calc. |
| BL | 13 T·m calc. |
| EBP | 37 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 85.4 dB calc. |
Mounting dimensions
| Cutout diameter | 11 1/16″ |
|---|---|
| Mounting depth | 5 13/16″ |
| Overall diameter | 12 1/2″ |
“≈” 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 Pioneer 12″ models
- Pioneer TS-300S4 12″ · 4 Ω
- Pioneer TS-A30S4 12″ · 4 Ω
- Pioneer TS-A120D4 12″ · dual 4 Ω
- Pioneer TS-A120S4E 12″ · 4 Ω
- Pioneer TS-A300D4 12″ · dual 4 Ω
- Pioneer TS-A301D4 12″ · dual 4 Ω
- Pioneer TS-A301S4 12″ · 4 Ω
- Pioneer TS-A3000LS4 12″ · 4 Ω
- Pioneer TS-D12D2 12″ · dual 2 Ω
- Pioneer TS-D12D4 12″ · dual 4 Ω
- Pioneer TS-SW3002S4 12″ · 4 Ω
- Pioneer TS-W12PRS 12″ · dual 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Polk Audio dX12-8 1.80 ft³ sealed · 2.37 ft³ ported
- Soundstream PXW-12 1.70 ft³ sealed · 2.22 ft³ ported
- BOSS Audio PD12LED 1.73 ft³ sealed · 2.05 ft³ ported
- Soundstream PXW-12/2 1.70 ft³ sealed · 1.98 ft³ ported
- Bomber Upgrade 375W 4 Ohm (SW12UP-375-4) 1.91 ft³ sealed · 2.51 ft³ ported
- Sky High Car Audio FE-12 D2 1.80 ft³ sealed · 2.08 ft³ ported
FAQ
What box does the Pioneer TS-300D4 need?
Recommended net volume: 1.80 ft³ sealed, 2.26 ft³ ported tuned to 30 Hz — for one sub in a sedan at 400 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Pioneer TS-300D4 Thiele/Small specs?
Fs 27 Hz, Qts 0.69, Vas 2.84 ft³, Xmax 0.40″, Sd 79.8 in².
What is the Pioneer TS-300D4 mounting depth?
Mounting depth is 5 13/16″, cutout diameter 11 1/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Pioneer TS-300D4 handle and how do I wire it?
RMS power rating: 400 W. Dual 4 Ω voice coils: series gives 8 Ω, parallel gives 2 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.