Sundown Audio - SLD-10 Shallow Mount 10" Subwoofer D2/D4

Sundown Audio - SLD-10 Shallow Mount 10" Subwoofer D2/D4
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
SLD 10"
T/S SPECS SLD 10″ D2 SLD 10″ D4
RE (Ohms) 3.65 6.85
FS (Hz) 44.907 46.817
VAS (L) 14.630 12.091
Qes 0.452 0.547
Qms 2.212 2.246
Qts 0.376 0.440
Le (mH)
BL (NA) 18.247 24.492
Mms (Grams) 146.252 162.818
Cms (uM/N) 85.883 70.979
Sens (dB @ 1w/1m) 86.5 85.4


Enclosure Specifications
SLD 10"
Sealed Enclosure 0.5 cu ft
Ported Enclosure 1.0 cu ft
Recommended Tuning 35Hz
Recommended Port Area 15 sq in
Displacement
Depth 4.9"
Outside Diameter 10.5″
Cut-Out 9.25″