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SA v.2 18 Dual 4 ohm | 1250w RMS Version 2 Subwoofer
Since 2009, the Sundown SA series has been our most popular line. What better way to make a new version 2 than to upgrade everything? Using a larger, more powerful motor, Sundown Audio maintains the perfect balance of the original SA series while increasing the power handling to 1250-watts RMS.
- 1250 Watts RMS / 2500 Watts Peak
- Dual 2 or 4 ohm voice coils
- Vented magnetic gap & pole piece
- Aluminum 2.75” voice coil former for superior heat dissipation
-
Innovative high velocity, cast aluminum vented frame spacer ring
- Magnet ID faraday ring for smooth acoustic response
- High-temperature copper voice coil wire
- Spring-loaded terminals
-
Stitched-on double “XL” tinsel leads
This SA-10/12/15 v.2 series is a top-down upgrade from the original SA series. The 2.75” coil punches way above its weight, outperforming many 3” coils without the adding weight & with the added advantage of a wider spider. We are able to perfectly balance the mass, motor force, and suspension stiffness for the intended power level.
The motor also features a large magnet shorting ring (faraday ring) to reduce distortion and deliver smoother response across the entire acoustic spectrum. The motor & coil setup is mated to an extremely robust multi-layer spider with fully tied-on & doubled-up “XL” tinsel leads. A competition-grade paper cone, strong foam surround, and cast aluminum frame are used to complete this masterpiece. On top of the ~19mm of one-way linear excursion we have an x-mech limit of 37mm one-way before coil bottom making it nearly "bottomless."
The 18" model features a larger diameter motor to drive the higher mass.
Specifications
| T/S SPECS | SAV2 18″ D2 | SAV2 18″ D4 |
|---|---|---|
| RE (Ohms) | 3.97 | 6.06 |
| FS (Hz) | 29.051 | 31.868 |
| VAS (L) | 114.234 | 106.964 |
| Qes | 0.424 | 0.458 |
| Qms | 3.052 | 2.853 |
| Qts | 0.372 | 0.395 |
| Le (mH) | 3.6326 | 4.7903 |
| BL (NA) | 32.523 | 38.159 |
| Mms (Grams) | 619.174 | 549.519 |
| Cms (uM/N) | 48.474 | 45.389 |
| Sens (dB @ 1w/1m) | 90.1 | 90.7 |
| Xmax | 19mm | 19mm |
Enclosure Specifications
| Sealed Enclosure | 3.5 cu ft |
| Ported Enclosure | 4.5 cu ft |
| Recommended Tuning | 35Hz |
| Recommended Port Area | 64 sq in |
| Displacement | 0.2 cu ft |
| Depth | 10.125" |
| Outside Diameter | 18.62" |
| Cut-Out | 16.69″ |
