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Sundown Audio

Sundown Audio U-15 D4 15" 1500W RMS Dual 4-Ohm U-Series Subwoofer

  • Based on 25 reviews
Condition: New
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Availability: In Stock.
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Arrives Wednesday, Jun 25
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Features

  • The Sundown Audio U-15 is a 15-inch subwoofer with a 1500 watt RMS power rating. It has a mounting depth of 9.05 inches, a mounting diameter of 14.01 inches, and an outside diameter of 15.59 inches. It also has a magnet diameter of 8.66 inches.

Description

U-15 D4 - Sundown Audio 15" Dual 4-Ohm 1500W RMS U-Series SubwooferSPECIFICATIONS: DC Resistance (Re): 6.1 Ω Resonance Frequency (Fs): 34.9 Hz Equivalent Volume (Vas): 63.9 L Electrical Q Factor (Qes): 0.39 Mechanical Q Factor (Qms): 3.48 Total Q Factor (Qts): 0.35 Voice Coil Inductance (Le): 3.80 mH Force Factor (BL): 34.6 NA Moving Mass (incl. Air Load) (Mms): 353.0 g Suspension Compliance (Cms): 0.06 mm/N Sensitivity: 90.2 dB 1w / 1mBox Recommendations: Sealed: 2.0 cu. ft. Ported: 3.0 cu. ft. Displacement: 0.24 cu. ft. Depth: 9.05 in Outside Diameter: 15.59 in Cutout Diameter: 14.01 in Recommended Tuning: 32 Hz Recommended Port Area: 48 sq. in

Brand: Sundown Audio


Speaker Maximum Output Power: 1500 Watts


Frequency Response: 34.9 Hz


Connectivity Technology: wired


Audio Output Mode: Surround


Mounting Type: Flush Mount


Material: Aluminum


Model Name: U-15 D4


Speaker Type: Surround Sound, Woofer


Special Feature: Durable


Recommended Uses For Product: For Car Audio Systems


Compatible Devices: Desktop, Television, Projector, Laptop


Subwoofer Diameter: 15 Inches


Controller Type: ring


Surround Sound Channel Configuration: 6.1


Included Components: Subwoofer


Product Dimensions: 9.05"D x 15.59"W x 15.59"H


Item Weight: 22.16 Kilograms


Impedance: 6.1 Ohm


Is Waterproof: FALSE


Warranty Type: Extended


Number of Items: 1


Control Method: Touch


Speaker Size: 15 Inches


Power Source: Corded Electric


Woofer Diameter: 15 Inches


Vehicle Service Type: Car


Water Resistance Level: Not Water Resistant


Audio Driver Type: Dynamic Driver


Audio Driver Size: 15 Inches


Subwoofer Connectivity Technology: Wired


Includes MP3 player?: No


Series Number: 1


Specific Uses For Product: In-car audio systems


UPC: 796516055152


Manufacturer: Sundown Audio


Item Weight: 48.7 pounds


Item model number: U-15


Is Discontinued By Manufacturer: No


Date First Available: March 20, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jun 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Sundown U-15 v.1 4 ohms
Picked up this SD-U15 dc 4ohm as a open box. Got it for a awesome price. Basically new with no signs of use. This sub hits hard.
Reviewed in the United States on May 24, 2025 by Javier Garcia
    • Louder than most Dual 12 and 10 inch setups
Lets talk subwoofer, if you want absolutely insane and loud bass on both low and somewhat high notes, look no further than the sundown audio U-15. I am simply taken aback at how incredibly tough, reliable, and loud these subwoofers are. I bought one of these hoping it would be louder than my original star audio dual 10 inch subwoofer setup. And let me tell you, this single monster absolutely blows them out of the water. The loudest I have gotten with these subwoofers is about 150.8 dbs. Here is the crazy part. I got this score 500 watts under its rms power. And trust me, it can easily handle its rated power. I have tortured this subwoofer with constant tones at about 1100 watts rms and it isn't even warm. In fact, its actually cold when I touch the dust cap. ... show more
Reviewed in the United States on April 2, 2023 by Daragh Carter
    • SUNDOWN POWAAA
From L7s to the U series, ill tell you its definitely a game changer. if you want your ears to ring, car to shake, windows to vibrate and be the loudest at the light this is definitely for you. I currently have them in a Q-bomb box, but with these whats really recommended is a custom to spec box for these. Paired with a JpV2 amp, youll have the best setup in town ... show more
Reviewed in the United States on February 29, 2024 by Jose Evans
    • An SPL sub that also has great sound quality
Worth the money. So I am hitting 152.3 db with 2- U-15’s in a ported box approximately 7.3cu/ft total for the two subs with 7k watts total. Upgraded from Skar vxf’s which only hit 150.8db in same setup and wattage. These just hit harder like being punched in the back on certain notes. And the SQ on these subs is very good too. Tune at 32-35hz and they will sound amazing. Very pleased, only sundown for me So little update just connected 2 total taramp md 5000.1 amps (1 per sub) and hitting 153db. These subs are amazing. Not sure what else you could want in a sub. ... show more
Reviewed in the United States on June 26, 2022 by Alan E.
    • This thing is a beast!!
I was skeptical about getting this sub at first. I was debating on getting a skar vxf 15 or thus sundown u 15. Im glad I went with the sundown! It has given me no problem’s and it hits way harder than my two sundown lcs 10s that i had before. If you are thinking about getting this sub, then get it you won’t regret it. ... show more
Reviewed in the United States on July 31, 2023 by Scott B
    • Slaps hard
Just installed them today and they r already the hardest hitting 15’s i ever owned !!
Reviewed in the United States on March 4, 2022 by Byron pearce
    • Get ready to be loud
Just what I wanted great subs
Reviewed in the United States on February 25, 2025 by Melly
    • Speechless
Im running 2 of these bad boys on a 10k rms amp .. literally can take a beating .. i upgraded from a vxf 15s.. the vxf blew up after 1 min of playing after amp upgrade ... but theses sundown u series with the price ,is so worth it .. im getting 2 more 😁😁😁
Reviewed in the United States on October 7, 2023 by Dee

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