Sundown Audio U-12 D4 12" 1500W RMS Dual 4-Ohm U-Series Subwoofer
- SKU #: 01845
The Sundown U Series is our premier “standard suspension” woofer series. It is the most direct replacement for the world famous Z v.3 woofer line which we produced from 2011 to 2016 before launching the “new platform” Z v.4 series. Due to numerous advancements in our design process the U Series is able to deliver performance on-par with the Z v.3 series but at a much lower cost.
We start with a double-stacked / 8.66” wide Y35 grade ferrite magnet system coupled to a one-piece, bumped T-Yoke and a 0.6” thick top-plate. Just as with the Z v.3 before it and 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 U 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 we use in our X v.2 series and, thus, the U series has the same 1500-watt RMS ratings. The coil temperature is kept in check by a heavily smoothed / high-velocity pole-vent and a series of ten direct air-gap vents in the back plate. The U series also features newly 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 series features an all-new cast aluminum frame series to the Sundown line which allows for taller cones than the older frames used on the Z v.3 series. The taller cones provide enhanced coil stability and increased mechanical excursion capability. We also tooled matching cast-aluminum surround clamps for the U series to ensure durability in the most demanding situations. The surrounds and cone bodies have been fully custom tooled especially for the U series and are stronger / support more excursion than the Z v.3 series cones and surrounds. The new cone bodies also feature an indentation for the same wide-flange, ultra-strong dust caps as our new platform subwoofers.
If you are looking for a woofer that sounds similar to the SA series but handles significantly more power… the U series is exactly what you need. It has been designed to live up to the reputation earned by our Z v.3 series both in terms of every-day music enjoyment and SPL competition.
Features & Technology:
- Xmax = 30mm one-way by 70% BL
- RMS Power = 1500-watts
- Heavily vented magnetic gap
- Optimized high-velocity pole vent
- Innovative high-velocity vented frame spacer ring
- Black Aluminum 3” voice coil former for superior heat dissipation
- High Temperature 4-Layer Round Wire Coil
- Large aluminum Faraday Ring (Magnet ID)
- Spring Loaded Terminals
- Stitched-On Double-XL Tinsel Leads to prevent fatigue and failure
- Bolted-On Surrounds
- Bolted-On 100% Nomex Spiders
- High-Strength Cast Aluminum Frame
- Optimized for small ported & band-pass enclosures
- 1500 Watts RMS
- Linear X-Max by 70% BL : 30 mm one-way
- Mounting Depth: 7.75"
- Mounting Diameter: 11.10"
- Outside Diameter: 12.83"
- Magnet Diameter: 8.66"
- Weight: 47LB
- Recommended Box Specs (Sealed): 1.0ft^3 (Yields F3 of 46Hz)
- Recommended Box Specs (Ported): 2.0ft^3 (Tune to 35Hz, yields F3 of 28Hz)
|DC Resistance (Re)||Ω||6.1|
|Resonance Frequency (Fs)||Hz||40.0|
|Equivalent Volume (Vas)||L||12.3|
|Electrical Q Factor (Qes)||0.38|
|Mechanical Q Factor (Qms)||2.93|
|Total Q Factor (Qts)||0.34|
|Voice Coil Inductance (Le)||mH||3.67|
|Force Factor (BL)||NA||33.7|
|Moving Mass (incl. Air Load) (Mms)||g||284.5|
|Suspension Compliance (Cms)||mm/N||0.06|
|Sensitivity||1w / 1m||85.0 dB|
|Sealed Enclosure Suggestion||cu. ft.||1.0|
|Ported Enclosure Suggestion||cu. ft.||2.0|
|Recommended Port Area||sq. in||32|
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