Sundown Audio - SLD-12 Shallow Mount 12" Subwoofer Dual 2 Ohm (Open Box)

Sundown Audio - SLD-12 Shallow Mount 12" 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 12" T/S SPECSSLD 12″ D2SLD 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 SLD 12" 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 Enclosure Designs coming soon...

Sundown Audio - SLD-12 Shallow Mount 12" Subwoofer Dual 2 Ohm (Open Box)

Sundown Audio - SLD-12 Shallow Mount 12" 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 12"

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

SLD 12"

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