YORKVILLE - Synergy 2x 21” Powered Subwoofer Dual 21

YORKVILLE - Synergy 2x 21” Powered Subwoofer Dual 21" Bass Reflex Powered Subwoofer: 6000 watts (program), 17,000 watts (peak) 2 x 21-inch LF woofers with 4.5-inch voice coils. Exceptionally high output and deep bass.

Marsoni

M251S

$3449.50

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

YORKVILLE - Synergy 2x 21” Powered Subwoofer Dual 21" Bass Reflex Powered Subwoofer: 6000 watts (program), 17,000 watts (peak) 2 x 21-inch LF woofers with 4.5-inch voice coils. Exceptionally high output and deep bass.This powerful dual 21 inch subwoofer offers the highest peak power and deepest bass response of any speaker in the Synergy series, Yorkville Sounds largest and most powerful point source system. The SA221S can be combined with an SA153 as an independent system, or with the SA153 and SA315S as a 5 way system. If it were any more powerful, it would have to be measured on the Richter scale. Features 17000 W Peak Power (6000 W Program) 2x 21 Neodymium

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We're hanging some shelves that will hold some weight and wanted a minimal amount of shelf to show. It's about what's on the shelf, not the bracket. The black metal adds just a touch of style against the white painted wood shelves. They look great. The best part is that the screws go right into the middle of the shelf which makes it easy to hit the center of the stud. Standard box store lumber fits perfectly. A 1 x 10 fits like a glove and the small lip finishes off the classic look. Comes with all sorts of mounting hardware and the screws are decent quality and went in with no issue or stripping. I usually have to buy better screws but these were fine. At this price it really was an excellent deal and they are heavy duty. Win Win Win.

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Reviewed in the United States on September 29, 2023

Verified Purchase

Emmanuel

Belleville, US

★★★★★ 5

Great for adding life around your home desk

Good size and sturdy enough for small speakers and great for adding small touches for decorating around your desk without cluttering your desk space

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Reviewed in the United States on December 1, 2025

Verified Purchase

Alphonso M.

Port Orchard, US

★★★★★ 5

Sturdy shelves

Shelves are sturdy and well built. The provided screws are garbage, just throw them out when the package arrives.

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Reviewed in the United States on August 11, 2023

Verified Purchase

Kim Orzell