- RMS 600 watts
- Dual 2 or 4 ohm voice coils
- Optimized for small, sealed enclosures
- Lightweight Neodymium motor
- Computer-optimized foam “w” surround
- Two-inch 8-layer copper voice coil
- Large aluminum Faraday ring for smooth acoustic response
- Patented high strength cast aluminum frame
- Low distortion motor construction
- High-temperature voice coil wire
- Spring-loaded terminals
- Stitched-on tinsel lead wires
The SD-4 series truly is a world-class sound quality woofer with low mounting depth, small box requirements, yet extraordinarily high power handling. It's the ideal choice for anyone seeking a high-quality, low-mounting-depth subwoofer that performs hammers in small enclosures. With enhanced mechanical durability and superb sound quality, you get the perfect marriage of form and function.
Specifications
| RE (Ohms) | 3.93 | 7.01 |
| FS (Hz) | 26.0429 | 26.7489 |
| VAS (L) | 63.5142 | 64.3194 |
| Qes | 0.6187 | 0.7374 |
| Qms | 5.4253 | 5.5061 |
| Qts | 0.5554 | 0.6503 |
| Le (mH) | 6.2790 | 8.6610 |
| BL (NA) | 14.9216 | 17.9033 |
| Mms (Grams) | 214.4713 | 200.7540 |
| Cms (uM/N) | 174.1371 | 176.3448 |
| Sens (dB @ 1w/1m) | 84.33 | 83.97 |
| Xmax | 14.5mm | 14.5mm |
| T/S SPECS | SD-4 12″ D2 | SD-4 12″ D4 |
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Enclosure Specifications
| Sealed Enclosure | 0.8-1.0 cu ft |
| Ported Enclosure | Not Recommended |
| Recommended Tuning | N/A |
| Recommended Port Area | N/A |
| Displacement | 0.1 cu ft |
| Depth | 4.91″ |
| Outside Diameter | 12.51" |
| Cut-Out | 10.94" |
| Physical Dimensions | Download |