Rockford Fosgate Power T3S1-19
19″ subwoofer · 1 Ω · 3,000 W RMS
Fs 27 HzQts 0.32Vas 3.70 ft³Xmax 1.34″
The published specs don’t add up:
- Sd of 228.2 in² is unusual for a 19″ (typically 151.9–209.3 in²).
- The published Xmax 1.34″ looks like max (mechanical) excursion, not linear: the excursion-limited power will read too high.
Recommended box
For a sedan, one sub, 3,000 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
| Net volume | 3.21 ft³ (91 L) |
|---|---|
| Qtc | 0.47 |
| Fc | 40 Hz |
| F3 (−3 dB, no cabin gain) | 70 Hz |
| Example box (outside) | 20 1/2″ × 20 1/2″ × 18 1/16″ |
Ported
| Net volume | 4.38 ft³ (124 L) |
|---|---|
| Tuning (Fb) | 27 Hz |
| Port | slot 4 1/8 × 19 13/16″, 61 3/16″ long |
| Port velocity at 3,000 W | 65 ft/s |
| F3 (−3 dB, no cabin gain) | 26 Hz |
| Example box (outside) | 31 1/2″ × 21 1/4″ × 24 7/16″ |
Thiele/Small parameters
| Fs | 27 Hz |
|---|---|
| Qts | 0.32 |
| Qes | 0.38 |
| Qms | 1.93 |
| Vas | 3.70 ft³ |
| Re | 0.8 Ω |
| Sd | 228.2 in² |
| Xmax | 1.34″ |
| Vd | 305.4 in³ calc. |
| Mms | 1,017 g calc. |
| BL | 19.1 T·m calc. |
| EBP | 71 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 89.4 dB calc. |
General
| Size | 19″ |
|---|---|
| Voice coils | 1 Ω |
| RMS power | 3,000 W |
Mounting dimensions
| Cutout diameter | 17 5/16″ |
|---|---|
| Mounting depth | 15 9/16″ |
“≈” 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 Rockford Fosgate 19″ models
- Rockford Fosgate Power T3S2-19 19″ · 2 Ω