The Sundown U Series is our premier “standard suspension” woofer series. The all-new U v.2 improves on the already incredible performance of its predecessor.

We start with a double-stacked / 9.44” wide Y35 grade ferrite magnet system (3/4” wider than the v.1) coupled to a one-piece, bumped T-Yoke and a 0.6” thick top-plate. Just as with our other high-end subwoofers we also add a very thick (5mm thickness) aluminum shorting ring inside the magnets to reduce static inductance and level out inductance over stroke. The v.2 adds a pole-cap aluminum shorting ring which doubles as a heat-sink and airflow guide. The U v.2 series motor also features a 0.6” long pole-extension to keep the coil under control at high levels of excursion.

The voice coil is a 2.36” long / 3” diameter 4-layer aluminum winding / aluminum former unit – which is the same coil design from the U v.1 – but the new version is built with a stronger aluminum former. The coil temperature is kept in check via a high-velocity solid pole / machined pole channels arrangement and a series of 16 direct air-gap vents in the back plate. The U v.2 series also features custom tooled cast aluminum vent rings in between the frame and top plate to effectively exchange air at a high velocity over the voice coil beneath the spider landing.

The U v.2 series features an all-new, custom tooled, cast aluminum frame designed specifically for this line. The cosmetics are very similar to the original v.1 frames but every size frame is substantially thicker and even features stiffening / heat dissipation ribs around the bottom part of the frame. The new frame design allows for significantly taller cones and wider spiders on the 10s and 12s compared to the v.1 which greatly enhance mechanical clearances. Moving on to the 15 the spider is also wider than the originals. The 18 uses the same spider and cone height as the originals but the frame is, of course, much stronger.

Given the stronger motor (15% more powerful), stronger coil construction, superior motor air-flow characteristics, and enhanced mechanical capacity we boosted the power rating to 1750-watts RMS from the 1500-watt rating of the previous version.

If you are looking for a woofer that sounds similar to the SA series but handles significantly more power… the U v.2 series is exactly what you need. It has been designed to live up to the reputation earned by our U v.1 series both in terms of every-day music enjoyment and SPL competition.

FEATURES

• Black Aluminum 3” voice coil former for superior heat dissipation
  
• High Temperature Round-Wire ALU voice coil with high-temp black adhesive
  
• Double stitched surround
  
• Heavy duty cast baskets – all new, custom-tooled
  
• Spring loaded terminals accept up to 8 gauge
  
• Stitched-on double-XL tinsel leads
  
• Solid pole with vent channels and aluminum shorting ring cap
  
• Rear drilled gap-venting
  
• Innovative high-velocity cast aluminum vented frame spacer ring
  
• Magnet ID shorting ring
  
• Top-Plate Cooling Channels
  
• Cast Aluminum surround bolt-on rings
  
• Optimized for small ported or bandpass enclosures

SPECIFICATIONS

• RE (Ohms): 3.8710
  
• FS (Hz): 30.9541
  
• VAS (L): 111.7625
  
• Qes: 0.5669
  
• Qms: 5.6396
  
• Qts: 0.5151
  
• Le (mH): 3.3981
  
• BL (NA): 27.4023
  
• Mms (Grams): 565.4130
  
• Cms (mm/N): 46.7560
  
• Sens (dB @ 1w/1m): 89.4169

ENCLOSURE SPECS

• Sealed Enclosure: 3.0 cu ft
  
• Ported Enclosure: 4.0 cu ft
  
• Recommended Tuning: 35Hz
  
• Recommended Port Area: 64 sq in
  
• Displacement: 0.26 cu ft
  
• Depth: 10″
  
• Outside Diameter: 18.63″
  
• Cut-Out: 16.9″

Shipping Policy

DBs Car Audio is proud to offer fast & free shipping on all items listed in our store!!

Shipping Methods and Transit Times

DBs Car Audio ships orders from our Kissimmee, Florida location. On occasion, orders will be fulfilled directly by the manufacturer or distributor in order to reduce the shipping time..

Order Tracking

Once an order has been shipped, we send our customers an email with the tracking number for the order. Click on the tracking link in the email to follow the location of the package on the carrier's website. If you did not receive a tracking number by email or need to confirm the tracking information, please contact call us at 1-800-927-9390

Signature Required

Due to the valuable contents of some shipments, DBs Car Audio will only require a signature upon delivery if the order is over $500. Such guidelines will not be overruled upon the customer's request. Please understand that this is a security measure taken by our Company to ensure the safe delivery of each package and guarantee excellent service. Many of our third-party shipping carriers and payment companies require signatures upon delivery to protect against fraud and theft. Customers may request a signature upon delivery by emailing us at dbscaraudiofl@gmail.com.

Shipping Policy Disclaimer

Delivery estimates do not apply to items shipped directly from the manufacturer, nor out-of-stock items. Some items that ship from the manufacturer can only be delivered to addresses within the 48 continental states.

Standard delivery time for domestic customers will average from 2-4 business days, but can take longer in some cases. Saturday, Sunday and national holidays are not considered business days for delivery purposes.

Our Shipping Guarantee applies only to shipments delayed due to our service failure. We will not guarantee shipments that are delayed due to an act of god (ex: weather), a catastrophic event, or failure by our delivery partners. Our guarantee is also voided if incorrect billing or shipping information is given and results in your order being delayed to its destination. Our guarantee is also void if no one is available to sign for shipment when delivery attempt is made if a signature is required.