About: Sundown Audio SLD-12" Shallow 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.  Due to popular demand we have 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 a 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 & Technology:

• Xmax = 12mm one-way by 70% BL
• 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 vent channels around the OD
• Magnet ID shorting ring

Enclosure Specifications: 

• Sealed Enclosure: 1 cu ft
• Ported Enclosure: 1.5 cu ft
• Recommended Tuning: 35Hz
• Recommended Port Area: 26 sq in 
• Depth 5.45"
• Outside Diameter: 12.625"
• Cut-Out: 11.125"