Pioneer TS-A120S4E 12″ A-Series Single 4-Ohm Subwoofer
400 W RMS SVC sub with glass-fiber IMPP cone and rubber surround
$99.99$129.99 (-23%)
Overview
The Pioneer TS-A120S4E is a 12-inch A-Series single 4-ohm subwoofer rated 400 W RMS and 1,400 W peak. A glass-fiber reinforced IMPP cone, rubber surround, and 48 mm voice coil deliver 22 Hz to 1.6 kHz response at 87 dB. Mounting depth is 5-3/8 inches with sealed and ported volume guidance from Pioneer.
Product details
12-inch SVC A-Series bass
TS-A120S4E keeps wiring simple with a single 4-ohm coil while still offering 400 W RMS / 1,400 W peak. Sensitivity is 87 dB, which helps extract output from mid-power amplifiers.

Glass-fiber IMPP and 48 mm coil
A glass-fiber reinforced IMPP cone and rubber surround stabilize the moving assembly, and Pioneer calls out a 48 mm voice coil for stronger low-frequency drive. Fs is 32.1 Hz with 8.25 mm Xmax across 22 Hz to 1.6 kHz.

Box volumes and depth
Pioneer lists about 1.25 cu. ft. sealed and 1.5 cu. ft. ported. Mounting depth is 5-3/8 inches (13.65 cm). Build or buy an enclosure that matches those volumes and feed the woofer near 400 W RMS.
Key features
- 12-inch A-Series single 4-ohm voice coil subwoofer
- 400 watts RMS and 1,400 watts peak power handling
- Glass fiber reinforced IMPP cone with rubber surround
- 48 mm voice coil for stronger low-frequency drive
- Fs 32.1 Hz; Xmax 8.25 mm; sensitivity 87 dB
- Frequency response of 22 Hz to 1.6 kHz
- Recommended sealed 1.25 cu. ft.; ported 1.5 cu. ft.; depth 5-3/8 in
Specifications
| Weight | 3.5 lbs |
|---|---|
| Dimensions | 9.5 × 10.6 × 6 in |
| Size | 12 inch |
| Brand | Pioneer |
| Model | TS-A120S4E |
| SKU | TSA120S4E |
| UPC | 884938446549 |
| Product type | Subwoofer |
| Voice Coil | Single 4-ohm |
| RMS Power | 400 W |
| Peak Power | 1400 W |
| Impedance | 4 ohms |
| Sensitivity (1W/1M) | 87 dB |
| Frequency Response | 22 Hz to 1.6 kHz |
| Mounting Depth | 5-3/8" (13.65 cm) |
| Cone Material | Glass fiber reinforced IMPP |
| Xmax | 8.25 mm |
| Fs | 32.1 Hz |
| Voice Coil Diameter | 48 mm |
| Sealed Box Volume | 1.25 cu. ft. (35.4 L) |
| Ported Box Volume | 1.5 cu. ft. (42.5 L) |
Important notes
- Single 12-inch A-Series 4-ohm subwoofer — you still need an enclosure and amplifier.
- Single 4-ohm load — confirm your amplifier is stable at 4 ohms for this woofer.
- Confirm mounting depth and enclosure volume before building or buying a box.
What's in the box
- Pioneer TS-A120S4E subwoofer






