Description
Sundown Audio v.4 15 D2
Sundown Audio E-Series v.4 15″ is a high-performance car audio subwoofer designed to deliver deep, clean, and powerful bass with excellent thermal handling and durability. The v.4 model features a dual voice coil design (dual 2 Ω or dual 4 Ω) and a class-leading 14 mm one-way linear Xmax for strong excursion in ported enclosures. Its robust motor includes a double-stacked magnet, vented magnetic gap and pole piece for superior cooling, high-temp 4-layer copper voice coil wire, and stitched “Mini-XL” tinsel leads, making it ideal for enthusiasts seeking impactful low-end performance in larger bass systems.
Tech Specifications
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RMS Power (D4)
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RMS Power (D2)
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Peak Power (D2)
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Peak Power (D4)
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RE D2 (Ohms)
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RE D4 (Ohms)
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FS D2 (Hz)
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FS D4 (Hz)
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VAS D2 (L)
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VAS D4 (L)
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Qes D2
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Qes D4
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Qms D2
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Qms D4
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Qts D2
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Qts D4
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Le D2 (mH)
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Le D4 (mH)
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BL D2 (NA)
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BL D4 (NA)
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Mms D2 (Grams)
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Mms D4 (Grams)
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Cms D2 (uM/N)
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Cms D4 (uM/N)
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Sens D2 (dB @ 1w/1m)
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Sens D4 (dB @ 1w/1m)
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Xmax D2
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Xmax D4
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| Subwoofer Measurements | |
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Product Sku
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v.4 15 |
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Displacement (Inches)
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Depth (Inches)
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Cutout (Inches)
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Motor Diameter (Inches)
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| Ported Enclosure Specs | |
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Ported Enclosure Size
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Recommended Port Area
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Recommended Port Tuning
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| Sealed Enclosure Specs | |
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Sealed Enclosure Size
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| 4th Order Enclosure Specs | |
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4th Order Sealed Side
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4th Order Ported Side
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4th Order Port Area
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4th Order Port Length
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Specifications
| T/S Specs | E v.4 15″ D2 | E v.4 15″ D4 |
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| RE (Ohms) | 4.030 | 6.130 |
| FS (Hz) | 30.535 | 30.539 |
| VAS (L) | 101.063 | 103.031 |
| Qes | 0.759 | 0.818 |
| Qms | 4.101 | 3.750 |
| Qts | 0.641 | 0.671 |
| BL (NA) | 15.880 | 19.247 |
| Mms (Grams) | 262.699 | 257.621 |
| Cms (mm/N) | 103.416 | 105.429 |
| Sens (dB @ 1w/1m) | 87.7 | 87.4 |
| Xmax | 14mm | 14mm |
About The Product
Typical entry-level woofers are highly limited in terms of linear excursion, mechanical ruggedness, and thermal performance. Through relentless research in their North Carolina Headquarters, Sundown optimized a 2.5” voice coil and a truly unique motor design to get the deepest possible bass response out of a 15” subwoofer.
The subwoofer showcases a distinctive motor design, featuring a heavily vented magnetic gap and solid pole piece, enabling exceptional thermal power handling. The spider itself is a high strength poly-cotton blend designed to handle the full capacity of the motor. To provide an additional level of ruggedness the spider is bolted down and glued to the frame. Its motor geometry allows for a remarkable 14mm one-way linear Xmax, delivering excursion equivalent to far larger cones.
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