Description
SUNDOWN AUDIO SLD-12 (SD-2) D2 (500W) Shallow
SLD SERIES 600W DVC SUBWOOFER
The Sundown SLD series can be considered a “re-boot” of the SD-2 line from 2011. The SD-2 was essentially a “shallow SA v1” by design – meaning it shared the cone, surround, and spider with the SA but with a shorter motor with a shorter coil. The SD series went another route starting with the 3rd generation (SD-3) – tilting more towards SQ and sealed enclosures (this remains true for the SD-4 series as well). Due to popular demand we created the SLD series to add a heavily abuse tolerant “shallow” that likes ported boxes back into the line-up!
Much like the current SD-4 series we utilized solid pole-piece so the SLD can also be mounted directly against the rear enclosure wall to reduce net depth requirements. Compared to the old SD-2 we have introduced numerous important upgrades: pole-piece channels for reduced air noise & increased cooling, top-plate “slits” for better cooling and less distortion, and a magnet ID shorting ring. In terms of long-term reliability we have also bolted down the spider, bolted the motor together, bolted on the aluminum pole cap, and added “mini-XL” lead wires thus ensuring many years of flawless service.
The bottom line is if you need a relatively shallow woofer that will take a beating then the SLD is, hands-down, the woofer for you from our line. If you are looking for more SQ then look toward the SD-4 series.
FEATURES
- Xmax = 12mm one-way by 70% BL
- Xmech is a hard limit of 25mm one-way (being over 2x the Xmax it is a very generous limit)
- RMS Power = 600-watts
- Black Aluminum 2.5” voice coil former for superior heat dissipation
- High Temperature 4-Layer copper voice coil wire
- Stitched-On “Mini-XL” Tinsel Leads to prevent fatigue and failure
- Solid Pole with high velocity vent channels machined around the OD
- Vented, EMD Cut, Top-Plate Design
- Bolt-through motor design to ensure maximum longevity and ruggedness against mechanical failures
** This motor is bolted through the top so the bolts are not visible from the back like several other models. - Magnet ID shorting ring
SPECIFICATIONS
T/S SPECS | SLD 12″ D2 | SLD 12″ D4 |
---|---|---|
RE (Ohms) | 3.65 | 6.85 |
FS (Hz) | 42.959 | 45.142 |
VAS (L) | 26.889 | 29.481 |
Qes | 0.691 | 0.619 |
Qms | 2.227 | 2.298 |
Qts | 0.415 | 0.487 |
Le (mH) | ||
BL (NA) | 19.868 | 23.025 |
Mms (Grams) | 204.319 | 168.773 |
Cms (uM/N) | 67.177 | 73.652 |
Sens (dB @ 1w/1m) | 88.1 | 88.3 |
ENCLOSURE SPECIFICATIONS
Sealed Enclosure | 1.0 cu ft |
Ported Enclosure | 1.5 cu ft |
Recommended Tuning | 35Hz |
Recommended Port Area | 26 sq in |
Displacement | |
Depth | 5.45″ |
Outside Diameter | 12.625″ |
Cut-Out | 11.125″ |
Physical Dimensions | Download |