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 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.
Specifications:
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"
Thiele-Small Parameters:
Dc Resistance (Re): 6.85 Ohms
Resonance Frequency (Fs): 45.142
Equivalent Volume (Vas): 9.481 L
Electrical Factor (Qes): 0.619
Mechanical Factor (Qms): 2.298
Total Factor (Qts): 0.487
Bl Factor (BL): 23.025
Mechanical Mass (Mms): 168.773
Mechanical Compliance (Cms): 73.652
Sens (dB @ 1w/1m): 88.3
