18 Sound 21NTLW5000-4 21" Neo Magnet 4000 Watt 4 Ohm Subwoofer

Marsoni

M251S

$539.40

Get it in 3 business days with 1 day shipping. Friday, May 29

18 Sound 21NTLW5000-4 21" Neo Magnet 4000 Watt 4 Ohm SubwooferOverview The 18 Sound 21NTLW5000 4 is a high performance 21 inch subwoofer, delivering a remarkable audio experience. This subwoofer has an average sensitivity of 96. 5 dB SPL at 1W 1m, ensuring powerful sound output. It features dual 115mm Tetracoil Aluminum Voice coils, providing exceptional handling of 4000 W program power. The ultra linear suspension behavior guarantees excellent sound clarity, while its symmetric flux density and inductance

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We offer a 30-day return/exchange service after receiving.
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This shelf is lightweight, looks nice, and was easy to install. It comes with a little level to help you install it properly. There are plenty of mounting holes to choose from, so it is easy to screw it directly into a stud, or to just use holes that are convenient for you. It comes with a plethora of mounting hardware. I mounted mine a bit high up and chose to mount it upside down so that I wouldn't see the three screws that hold the shelf to the mounting bracket.

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Reviewed in the United States on April 8, 2026

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Sonya H

Omaha, US

★★★★★ 5

Excellent floating shelves look very high end

Easy to install and bracket is hidden once shelf is installed Very sturdy. Wipe clean surface.

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Reviewed in the United States on April 21, 2026

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Marily

Houston, US

★★★★★ 5

Great shelves!

Size: 24x5.8, Color: Black, Size: 24x5.8, Color: Black

I love these shelves (I purchased 6 shelves total). The size I got was perfect, looks phenomenal, & quality is great too! Only negative thing I’d say is that it could be difficult for some people to set up as it needs to be leveled, & can be hard to align with other things since the part that attaches to the wall is separate from the shelf (due to its floating design) but once it’s up, it looks great. Definitely good value for money with its quality. I have them to hold up decorations/toys, & you think some of my shelves have about 5lbs of stuff on it & I’ve had no issues, so functionality is good.

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Reviewed in the United States on December 12, 2025

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Ken Antunes

Natrona Heights, US

★★★★★ 5

Easy install and looks good

Exactly as expected. Easy to install and look great.

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Reviewed in the United States on May 6, 2026

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LORI KREBS

Birmingham, US

★★★★★ 5

Extremely satisfied

Size: 24x5.8, Color: Black, Size: 24x5.8, Color: Black

Very nice. I am extremely happy with them. I used painters tape to hold the bracket in place while I screwed it in, worked like a charm 😁 holds a lot of items

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Reviewed in the United States on April 11, 2026