SUNDOWN AUDIO SLD-12 D4 12" 600 WATT DUAL 4 OHM SHALLOW SUBWOOFER

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 Sundown Audio SLD-12 D4 12" 600 Watt Dual 4 Ohm Shallow Subwoofer This listing includes: (1) Sundown Audio SLD-12 D4 12" 600 Watt Dual 4 Ohm 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 (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 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: RE (Ohms): 6.85 FS (Hz): 45.142 VAS (L): 29.481 Qes: 0.619 Qms: 2.298 Qts: 0.487 BL (NA): 23.025 Mms (Grams): 168.773 Cms (uM/N): 73.652 Sens (dB @ 1w/1m): 88.3