Sundown Audio U Series 18" v.2 D2 Subwoofer: Unleash Competition-Grade Bass.
The Sundown Audio U-18 v.2 D2 18" Subwoofer is engineered to excel in both demanding SPL competition lanes and everyday musical enjoyment, delivering deep, precise, and impactful bass.
The U-18 v.2 D2 is a force to be reckoned with, boasting an incredible 2000 Watts RMS and 4000 Watts Peak power handling capability.
This robust capacity ensures that the subwoofer can reproduce the most demanding low-frequency content with astounding clarity and sustained output.
Its impressive Sensitivity (Sens) of 89.4169dB signifies efficient conversion of power into acoustic energy.
Designed for peak performance in a variety of setups, the U-18 v.2 D2 is optimized for small ported or bandpass enclosures.
It performs exceptionally well in 4.0 cu ft net ported enclosures, with a recommended tuning of 35Hz and a substantial 64 sq in port area.
For those preferring tighter, more defined bass, it also excels in 3.0 cu ft sealed enclosures.
The minimal Displacement of 0.26 cu ft ensures maximum usable air space within your chosen enclosure, facilitating powerful output from a relatively small footprint.
The U-18 v.2 D2 incorporates a comprehensive suite of thermal management features to ensure extended performance and longevity.
It utilizes a 3” black aluminum voice coil former and high-temperature copper voice coil for superior heat dissipation.
A solid pole with vent channels, an aluminum shorting ring cap, rear gap-venting, and a series of 16 direct air-gap vents in the back plate all work in concert to actively cool the voice coil, maintaining optimal operating temperatures even under the most strenuous conditions.
Built for extreme durability, the U-18 v.2 D2 features a heavy-duty cast basket and a custom, substantially thicker aluminum frame equipped with heat dissipation ribs at the bottom of the frame.
The double-stitched surround ensures robust cone excursion control, while stitched-on heavy-duty tinsel leads prevent fatigue and maintain reliable electrical connections.
Spring-loaded terminals accept up to 8-gauge wire for secure and efficient power delivery, making this subwoofer ready for the rigors of competition.
Its robust outside diameter of 18.63", cut-out of 16.9", and mounting depth of 10" provide precise fitment.
This subwoofer's design prioritizes both power and precision.
A double-stacked 9.4-inch wide ferrite magnet system is coupled to a thick top plate, providing immense motor force.
A thick set of shorting rings are used inside the magnets and on the pole cap, smoothing out frequency response while also acting as heat sinks and airflow guides.
The U v.2 motor also features an extended pole piece to keep the 30mm Xmax voice coil under perfect control even under high stress, resulting in exceptionally clean, undistorted, and highly accurate bass reproduction.
