Product Overview
About: Sundown Audio U-10 D4 10" 1500W RMS Dual 4-Ohm U-Series Subwoofer
Finalized terminal spacing, basket color, venting, cast aluminum surround clamp rings, etc. After about a year of work I think the U series maybe ready to start production soon. Stay tuned for more updates! This will be our new series to bridge the gap from the SA to the X v.2 series -- it is also the most direct replacement for the discontinued Z v.3 series but at a much lower price. They use the same voice coil as the X v.2 series; therefore RMS power is 1500-watts rated conservatively. The motor is a similar design to the X v.2 series with one less magnet slug since it isn't needed for use on these frames & soft parts. It also retains a magnet ID shorting ring just like the X v.2 series motor. I have tooled 4 new cone bodies & surrounds to mate up to an entirely different frame tooling from the 1st prototypes. These surrounds are based on the Z v.3 18" surround geometry as this has been our go-to cone for SPL (we use those cones in our Terra for our World Record in SS 3-4 class). We also have tooled the cones to support the same wide-flange dust caps we use on all the new platform drivers. They also feature custom tooled cast aluminum vent spacers to mate up correctly to these frames. We tooled 2 different spacers for this line. Another new feature (also fully custom tooled) is the cast aluminum surround bolt-on ring. We tooled one for each size U series. These woofers will have a similar sound to the Z v.3 series -- meaning they do not have the "new platform" sound of the X, Z, NS, etc.
Specifications:
- DC Resistance (Re): 6.1 Ω
- Resonance Frequency (Fs): 41.1 Hz
- Equivalent Volume (Vas): 11.5 L
- Electrical Q Factor (Qes): 0.39
- Mechanical Q Factor (Qms): 3.21
- Total Q Factor (Qts): 0.35
- Voice Coil Inductance (Le): 3.71 mH
- Force Factor (BL): 29.7 NA
- Moving Mass (incl. Air Load) (Mms): 219.7 g
- Suspension Compliance (Cms): 0.07 mm/N
- Sensitivity: 84.9 dB 1w / 1m
Box Recommendations:
- Sealed: 0.5 cu. ft.
- Ported: 1.0 cu. ft.
- Displacement: 0.21 cu. ft.
- Depth: 7.007 in
- Outside Diameter: 10.94 in
- Cutout Diameter: 9.17 in
- Recommended Tuning: 32 Hz
- Recommended Port Area: 16 sq. in
