Customer Service: (323) 231-3525

Sundown Audio U-18 D2 18" 1500W RMS Dual 2-Ohm U-Series Subwoofer

  • SKU #: 01848

Special Price $499.99

Retail: $519.99

($20.00 savings)

Availability: In Stock

Condition: Brand New
Shipping: Free Shipping
Sold As: Individually

* Required Fields

Special Price $499.99

Retail: $519.99

Sundown Audio U-18 D2 18" 1500W RMS Dual 2-Ohm U-Series Subwoofer

Click to view larger image

The long awaited and highly anticipated Sundown Audio "U Series" subs are finally here. Jacob Fuller and the team spent over a year to design, engineer, and tool proprietary elements to ensure the U-Series stands up to the incredibly high expectations set by Sundown and their lineup.

The “U Series” utilizes the same 1500 watt RMS Voice Coil as the entire X-V2 (10-18") series with a similar rear-vented motor design. The “U Series” is the most direct replacement in the Sundown line for the world famous Z-v.3 series that was available from 2011 through 2016. The “U” varies from its similarly power-rated sibling, the “X” series, in that it does not use the “Sundown new platform” frame, spider, and surround technology. The “U” series is equipped with an extremely capable “traditional” suspension design – which results in a “punchier” sound when compared to the “new platform” woofers. It also lends itself better to high-frequency SPL competition classes for the same reason.

The list of "custom tooled" parts designed specifically for this sub is seemingly never-ending; including custom cone body, custom surround (larger and thicker than the Z-v.3 series), custom cast aluminum vent spacers, and a completely new cast aluminum surround bolt-on ring.

Along with every other Sundown model, WoofersEtc is proud to offer a 2 year warranty against any defect in parts and labor.

Features:

  • Black Aluminum 3” voice coil former for superior heat dissipation
  • High Temperature Round-Wire CCAW voice coil with high-temp black adhesive
  • Double stitched surround
  • Heavy duty cast basket
  • Spring loaded terminals accept up to 8 gauge
  • Stitched-on double-XL tinsel leads
  • Rear vented pole piece
  • 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
  • Available in Dual-2 and Dual-4 ohm Impedance

Specifications:

  • 1500 Watts RMS
  • Linear X-Max by 70% BL : 30 mm one-way
  • Mounting Depth: 10.11"
  • Mounting Diameter: 16.69"
  • Outside Diameter: 18.66"
  • Magnet Diameter: 8.66"

Enclosure Recommendations:

  • Sealed: 3.0 ft^3
  • Ported: 4.0 ft^3
  • Displacement: 0.25 ft^3
  • Depth: 11.25"
  • Outside Diameter: 18.425
  • Cut-Out: 16.692"
  • Recommended Tuning: 32hz
  • Recommended Port Area: 64 in^2



DC Resistance (Re) Ω 3.8
Resonance Frequency (Fs) Hz 31.3
Equivalent Volume (Vas) L 135.4
Electrical Q Factor (Qes) 0.37
Mechanical Q Factor (Qms) 3.41
Total Q Factor (Qts) 0.33
Voice Coil Inductance (Le) mH 2.62
Force Factor (BL) NA 29.9
Moving Mass (incl. Air Load) (Mms) g 444.1
Suspension Compliance (Cms) mm/N 0.06
Sensitivity 1w / 1m 92.3 dB
Sealed Enclosure Suggestion cu. ft. 3.0
Ported Enclosure Suggestion cu. ft. 4.0
Displacement cu. ft. TBA
Depth in 10.11
Outside Diameter in 18.66
Cutout in 16.69
Recommended Tuning Hz 32
Recommended Port Area sq. in 64

Additional Information

You Recently Viewed
  1.  Zapco DSP-Z8 IV 8-Channel Digital Sound Processor

    Zapco DSP-Z8 IV 8-Channel Digital Sound Processor

    Special Price $549.99

    Retail: $600.00

  2. Sundown Audio NeoPro-8 V3 8" 200W RMS 8-Ohm Carbon Fiber Midrange Speaker (Single)

    Sundown Audio NeoPro-8 V3 8" 200W RMS 8-Ohm Carbon Fiber Midrange Speaker (Single)

    Special Price $133.99

    Retail: $225.99

  3. F250110 - Ground Shaker 10" Single Sealed Ford F250 02-09 Box

    F250110 - Ground Shaker 10" Single Sealed Ford F250 02-09 Box

    Special Price $99.99

    Retail: $129.99

  4. Focal Utopia TBM 1" Beryllium 'M'-profile Inverted Dome Tweeters

    Focal Utopia TBM 1" Beryllium 'M'-profile Inverted Dome Tweeters

    Special Price $1,749.99

    Retail: $1,999.99

  5. Mosconi PRO 5/30 5-Channel 1900W RMS Class D Sound Quality Amplifier

    Mosconi PRO 5/30 5-Channel 1900W RMS Class D Sound Quality Amplifier

    Special Price $1,999.99

    Retail: $2,399.99