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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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Description
Sundown Audio - X-Series v.4 18”The Sundown Xv4 18 Subwoofer delivers unmatched power and control for serious bass enthusiasts. Built with high grade X v. 4 coils, this subwoofer is designed to handle up to 3000W RMS 6000W peak power, ensuring maximum output without distortion. Its optimized design enhances air movement and cooling, providing long lasting performance even under heavy use. The advanced motor structure and large cone area (SD 113. 41) create powerful low frequency
- The Sundown Xv4 18″ Subwoofer delivers unmatched power and control for serious bass enthusiasts. Built with high-grade X v.4 coils, this subwoofer is designed to handle up to 3000W RMS / 6000W peak power, ensuring maximum output without distortion.
- Its optimized design enhances air movement and cooling, providing long-lasting performance even under heavy use. The advanced motor structure and large cone area (SD 113.41) create powerful low-frequency response and clean sound reproduction.
- Perfect for sealed or ported enclosures, the Xv4 18″ gives you flexibility in setup and tuning — whether for SPL competition or everyday high-quality listening.
- Durable, reliable, and beautifully crafted, this subwoofer is the next-level upgrade your sound system deserves.
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18″ Xv4 Series Subwoofer
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3000W RMS / 6000W Peak Power
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Dual 1-Ohm or Dual 2-Ohm Voice Coil Options
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Precision-engineered X v.4 Coils for stability
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Heavy-duty motor with 9.25″ diameter
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Deep bass response with 35 mm Xmax
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Sealed or ported enclosure compatibility
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Recommended Port Tuning: 32 Hz
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Built for extreme durability and clean sound
Specification Value RMS Power 3000 W Peak Power 6000 W Displacement 0.28 cu ft Mounting Depth 15″ Outside Diameter 18.42″ Cutout Diameter 16.69″ Motor Diameter 9.25″ Sealed Enclosure Not Recommended Ported Enclosure 7.00 cu ft Recommended Port Tuning 32 Hz Recommended Port Area 112 sq in 4th Order Sealed Side 3.0 cu ft 4th Order Ported Side 9.0 cu ft 4th Order Port Area 180 sq in 4th Order Port Length 8″ Xmax 35 mm SD (Cone Area) 113.41 RE (Ohms) 2.05 / 3.74 FS (Hz) 25.87 / 25.58 VAS (L) 93.67 Qes 0.63 / 0.55 Qms 4.13 / 4.03 Qts 0.54 / 0.84 BL (NA) 19.74 / 26.8 Mms 737.81 / 656.74 Sensitivity 86 / 87 dB T/S Specs RMS Power (D2)RMS Power (D1)Peak Power (D1)Peak Power (D2)RE D1 (Ohms)RE D2 (Ohms)FS D1 (Hz)FS D2 (Hz)VAS D1 (L)VAS D2 (L)Qes D1Qes D2Qms D1Qms D2Qts D1Qts D2BL D1 (NA)BL D2 (NA)Mms D1 (Grams)Mms D2 (Grams)Cms D1 (uM/N)Cms D2 (uM/N)Sens D1 (dB @ 1w/1m)Sens D2 (dB @ 1w/1m)Xmax D1Xmax D2Subwoofer Measurements Displacement (Inches)Depth (Inches)Cutout (Inches)Motor Diameter (Inches)Ported Enclosure Specs Ported Enclosure SizeRecommended Port AreaRecommended Port Tuning4th Order Enclosure Specs 4th Order Sealed Side4th Order Ported Side4th Order Port Area4th Order Port Length
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
Quality of fabric may be less plush.
Size: 50"x60", Color: Tan
Very soft and plush blanket, although it not as thick and heavy as previously purchased in another color (same brand) it’s still a nice blanket.
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Great blanket
Size: 60"x80", Color: Dark Brown
Can’t believe how soft this blanket is! Was kinda going back and fourth about getting it because of the cost but honey money well spent. 10/10 no notes
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Heartfelt Gesture of Appreciation
Size: Classic Cozy Collection, Color: "Thank You" Card
The Unboxme Thank You Gift Box proved to be the epitome of a thoughtful and appreciated gift. I recently chose this box as a thank you gift for my mother-in-law, and it was met with genuine delight and gratitude.
The Warm + Cozy theme of the box was not just a label; it encapsulated the essence of the carefully curated items within. From the moment she opened the box, my mother-in-law was greeted with an array of cozy delights that radiated warmth and care.
The inclusion of quality items, such as a plush blanket, scented candle, and gourmet treats, showcased the attention to detail in selecting items that truly contribute to a cozy and comforting experience. The blanket, in particular, was not just a token gesture but a genuinely luxurious addition that she immediately embraced.
The packaging was not only aesthetically pleasing but also conveyed a sense of thoughtfulness and care in the presentation of the gift. The attention to detail in the arrangement of items and the quality of the box itself elevated the entire unboxing experience.
What made this gift even more special was its versatility. The Warm + Cozy box is suitable for various recipients, including clients, coworkers, bosses, neighbors, and employees. Its universal appeal speaks to its well-rounded selection of items that can bring joy to a wide range of individuals.
In conclusion, the Unboxme Thank You Gift Box for Women, Warm + Cozy edition, is more than just a collection of items; it's a gesture of genuine appreciation and care. My mother-in-law's positive reaction is a testament to the success of this thoughtful gift. Highly recommended for anyone looking to express gratitude with a touch of warmth and coziness.
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Reviewed in the United States on December 11, 2023
★★★★★ 5
Big hit present for mom.
Size: Classic Cozy Collection, Color: "Sending Hugs" Card
My wife of 59years loved this gift. She said it was such a thoughtful gift. She is a tea lover too. This was not flowers or clothes so big surprised.
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Very nice care basket!
Size: Classic Cozy Collection, Color: "Get Well Soon" Card
I really liked the quality of the mug. I gave this as a gift! I wanted to buy it for myself too! The tea and honey looked like good quality!
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Reviewed in the United States on April 24, 2026
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