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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Do not waste your money on these, not as described, very cheap, hardware does not work. Going to have to repair my wall before I can do anything else. Completely unacceptable product. Very frustrating and was not properly represented in the marketing advertising. Do not buy. Would like to return, but waited 3 days to long. If I had opened them immediately I would have seen the poor quality.

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Reviewed in the United States on May 2, 2026

Verified Purchase

joy studnick

Waukegan, US

★★★★★ 5

Put shelves in before connecting the sides

Color: Black, Size: 6 Tier(8 inches)

Once it’s put together, it’s very nice. I will caution you to remember that the two sides do not get attached before you put in the shelves. You cannot put the shelves in once the two sides are connected. If you remember that, the assembling is not so bad..

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Reviewed in the United States on May 23, 2026

Verified Purchase

Amazon Customer

Houston, US

★★★★★ 5

👍👍

Color: White, Size: 6 Tier(8 inches)

I love how it makes my laundry area looks, It fit perfectly in the small space between the wall and the washer. I would have like if the big containers of detergent fit better in the lower shelves, but I made it work. It's not adjustable, the quality it pretty good, no complaints about the quality, assembly was easy and it's pretty stable.

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Reviewed in the United States on April 30, 2026