JBL Stage 1200D Dual 12″ Slot-Ported Subwoofer Enclosure
500 W RMS dual-twelve loaded box at 2 ohms
$399.95
Overview
Stage 1200D loads dual 12-inch Stage subwoofers in a rugged slot-ported MDF enclosure. The system handles 500 W RMS / 1000 W peak at 2 ohms with 94 dB sensitivity and 34–200 Hz response. Carpeted 5/8" MDF construction measures about 30-1/8" W × 15" H × 13-11/16" / 10-1/2" deep. Two Stage 12-inch woofers share a slot-ported enclosure tuned for efficient output without building a custom box.
Product details
Dual twelves, one box
Two Stage 12-inch woofers share a slot-ported enclosure tuned for efficient output without building a custom box. Test-fit the baskets in the factory openings and note any depth or magnet clearance issues before final fastening. Use the included grilles where factory panels do not already cover the drivers, and verify polarity on every channel.

2-ohm system load
Nominal 2-ohm impedance wants a mono amplifier stable at 2 ohms near 500 W RMS. Do not starve the voice coils with a weak amp. Test-fit the baskets in the factory openings and note any depth or magnet clearance issues before final fastening. Use the included grilles where factory panels do not already cover the drivers, and verify polarity on every channel.

Footprint
About 30 inches wide — measure trunk or hatch space and leave the slot port clear. Test-fit the baskets in the factory openings and note any depth or magnet clearance issues before final fastening. Use the included grilles where factory panels do not already cover the drivers, and verify polarity on every channel.
Key features
- Dual 12" (300 mm) Stage subwoofers
- 500 W RMS / 1000 W peak
- Nominal impedance 2 ohms
- Sensitivity 94 dB
- Frequency response 34 Hz – 200 Hz
- Slot-ported 5/8" MDF enclosure with carpet
- Voice coil diameter 2" each
- Compact vs many dual-twelve boxes
Specifications
| Brand | JBL |
|---|---|
| Model | Stage 1200D |
| SKU | STAGE1200D |
| UPC | 050036381567 |
| Product type | Loaded dual subwoofer enclosure |
| Drivers | Dual 12" (300 mm) |
| Power handling | 500 W RMS / 1000 W peak |
| Sensitivity | 94 dB |
| Frequency response | 34 Hz – 200 Hz |
| Impedance | 2 ohms |
| Voice coil | 2" (50.8 mm) each |
| Enclosure | Slot-ported 5/8" MDF, carpeted |
| Dimensions | 30-1/8" W × 15" H × 13-11/16" D1 × 10-1/2" D2 |
| Amplifier | Required |
| Enclosure Type | Loaded |
| Size | 12 inch |
Important notes
- Amplifier required — enclosure is passive.
- Stable 2-ohm mono amp recommended near 500 W RMS.
- Measure vehicle cargo space before ordering.
- Leave the slot port unobstructed.
What's in the box
- 1x Subwoofer enclosure
- Owner manual
- 2x Brand stickers


