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U-Series v.2 12
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U-Series v.2 12
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U-Series v.2 12
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U-Series v.2 12
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U-Series v.2 12

U-Series v.2 12" Subwoofer

Regular price $549.99 USD
Regular price Sale price $549.99 USD
Shipping calculated at checkout.

Notice On Packaging For Subwoofers
Sundown Audio has led the industry in quality and performance for over a decade. To improve accuracy and transparency, we have updated our subwoofer power ratings to reflect true real-world performance.
During this transition, some packaging may show previous ratings. Performance fully aligns with our current published specifications. If you have any questions about authenticity or ratings, please contact directly for confirmation.

Impedance: D4
  • 2000 Watts RMS / 4000 Watts Peak
  • Dual 2 or 4 ohm voice coils
  • Optimized for small ported or bandpass enclosures
  • Aluminum 3” voice coil former for superior heat dissipation
  • High-temperature copper voice coil
  • Double stitched surround
  • Heavy-duty cast basket
  • Spring-loaded terminals accept up to 8-gauge wire
  • Stitched-on heavy-duty tinsel leads
  • Solid pole with vent channels and aluminum shorting ring cap
  • Rear gap-venting
  • Top-Plate Cooling Channels

Designed to be at home in the competition lanes or playing your favorite music, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9.4-inch wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. A custom, substantially thicker aluminum frame was designed specifically for the U Series, equipped with heat dissipation ribs. The U v.2 motor also features an extended pole piece to keep the coil under perfect control under high stress. 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.

Dimensions

    ParameterD2 ModelD4 Model
    Re3.84 Ω6.05 Ω
    Fs41.3 Hz41.9 Hz
    Qms4.74004.9000
    Qes0.48000.5800
    Qts0.44000.5200
    Vas14.760 L14.750 L
    Mms358.64 g356.54 g
    Cms0.04 mm/N0.04 mm/N
    BL27.260 T·m31.120 T·m
    Le3.18 mH4.36 mH
    Sd735.5 cm²735.5 cm²
    Xmax30mm30mm
    SPL (1W/1m)88.3 dB85.6 dB
    SpecificationD2 ModelD4 Model
    RMS Power2000 W2000 W
    Peak Power4000 W4000 W
    Displacement.19cu ft.19cu ft
    Mounting Depth8.43"8.43"
    Outside Diameter12.84"12.84"
    Cutout Diameter11.2"11.2"
    Motor Diameter9.7"9.7"
    Sealed Enclosure1cu ft1cu ft
    Ported Enclosure2.0cu ft2.0cu ft
    Recommended Port Tuning35hz35hz
    Recommended Port Area32sq in32sq in
    Xmax30mm30mm
    4th Order Sealed.75cu ft.75cu ft
    4th Order Ported2.25cu ft2.25cu ft
    4th Order Port Area45sq in45sq in
    4th Order Port Length6"6"

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