Best in 7 days
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 17 - Jun 22
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Polk 10" Subwoofer Ultramarine - Silver [UMS108SR]10" Subwoofer Ultramarine Silver Polk's marine subwoofers have always been known for intelligent design, impressive sound, and weather resistance. The UMS108 sub continues this tradition with solid construction that stands up to the elements. The UMS108 is made to kick out deep bass under challenging conditions. Its mica reinforced polypropylene cone handles up to 350 watts RMS, and the stiffness of the cast aluminum basket gives you the clean, hard
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- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.7 ★★★★★
Based on 1844 reviews
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Product Reviews
★★★★★ 5
Heavy-Duty Base with Convenient Mobility
This umbrella base does exactly what it’s supposed to—keeps the umbrella stable while still being easy to move around when needed. Once filled with water/sand, it feels solid and secure even on slightly windy days, which gives peace of mind.
The built-in wheels are a standout feature. Moving the base across the patio is smooth and doesn’t require much effort. The handle placement is well thought out, making repositioning quick and hassle-free.
Overall, it’s a great balance of stability and convenience. Highly recommend if you want a sturdy base without sacrificing mobility.
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Reviewed in the United States on March 31, 2026
★★★★★ 5
The base that fits!
Finally, easy to put together and the right fit just before summer. It was extra windy so I put extra weight.
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Reviewed in the United States on March 23, 2026
★★★★★ 5
Holds up in high winds
Easy set up and holds umbrella in high winds
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Sturdy umbrella base
Sturdy umbrella base. Heavy duty and should not blow over in the wind. Will hold up for years.
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Reviewed in the United States on March 23, 2026
★★★★★ 5
Great
It is very sturdy, you can fill it with water or sand, easy to move around and the perfect base for any patio umbrella. I love it
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Reviewed in the United States on April 27, 2026
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