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Soundbox ARC300 Diffuser (2 per box)

Marsoni M251S
Sale price$449.50
Pay 4 payments of $112.38 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Soundbox ARC300 Diffuser (2 per box)Have a stunningly balanced sound environment without the irritating slap echoes Effective diffusion is all about being able to spread sound reflections in a space for a wider, more open feel. The Arc 300 Diffuser does just that with its 180 degree curve diffusing surface that has specially designed thin vertical slots meant to absorb low broadband frequencies as well. All of these qualities help keep the sound energy in your space at an even level so
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  • We offer a 30-day return/exchange service after receiving.
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4.7 ★★★★★
Based on 1266 reviews
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A
Amazon Customer
Cuba, US
★★★★★ 1
Major Safety Red Flag! 3 Prong Outlets, 2 Prong Plug, This Does Not Provide A Grounded Connection!
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
This power strip has a compact design, a convenient outlet layout, and USB ports, so on the surface it looks useful. The patented three-row layout is clever for spacing the outlets, but that only applies to how the outlets are positioned. It does not change how the strip is actually powered or protected. The problem is the safety design. It has 11 three-prong outlets, but the wall plug itself is only two-prong. Without a ground prong, it is not grounded. The two flat prongs are hot and neutral only, so this does not provide the grounded protection that the three-prong outlets appear to suggest. That also makes the surge protection claims highly questionable to me. A real grounded surge protector should have a grounding path for excess surge energy. With only a two-prong plug, I would not trust this to provide the kind of surge protection people generally expect when plugging in electronics or grounded devices. The manual mentions surge protection, ground protection, short-circuit protection, over-current protection, over-voltage protection, over-heat protection, and UL 1363 safety standards, but I could not find any visible UL, ETL, or similar safety certification mark on the unit or paperwork. The only marking I saw was FCC, which is not the same thing as electrical safety certification. Given the two-prong plug and three-prong outlets, those protection claims feel dubious at best and misleading at worst. The USB charging is also underwhelming. The total USB output is listed as 24W, which is not much for today’s devices, especially when that power is shared across multiple ports. We frequently use 35W or higher from a single USB charger, so I would not buy this for fast or modern device charging either. Because of the two-prong plug paired with three-prong outlets, I will absolutely not use this. I do not want a power strip that makes devices appear protected or grounded when they are not. For me, this is not a small design issue. It is a serious safety concern.
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Reviewed in the United States on May 20, 2026
Y
Yuki WONG
New York, US
★★★★★ 3
Convenient Design but Raises Some Safety Concerns
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
As other reviews have mentioned, this power strip does not provide true grounding protection. It allows devices with three-prong plugs to connect through a two-prong wall outlet, but the strip itself still relies on a two-prong connection. Because of that, I think it’s important to understand the potential safety limitations before using it, especially with higher-powered electronics. It does offer a large number of outlets and USB ports, which is convenient for older homes with limited access to modern plugs. However, considering the price, there are safer and more reliable alternatives available that may be a better long-term choice.
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Reviewed in the United States on May 24, 2026
S
Verified Purchase
shari
Louisville, US
★★★★★ 5
Great little power strip.
Size: 6 Outlets, Style: Desk Socket - White
I used this in my garage as a battery charging station for all my cordless tools. BONUS that is has USB & USB-C that charges my flashlight and phone when I need to plug in! It's super easy to mount.
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Reviewed in the United States on May 21, 2026
S
Verified Purchase
SMD
Birmingham, US
★★★★★ 5
Perfect just what I was looking for!
Size: 6 Outlets, Style: Desk Socket - Black
This product is great! I bought it to mount under my new desk. It comes with two-sided sticky tape which worked out great. Now all my cords are hidden! perfect.
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Reviewed in the United States on March 24, 2026
D
Verified Purchase
Doug Harper
Grantham, US
★★★★★ 5
VeryUuseful!
Size: 6 Outlets, Style: Desk Socket - White
The first power strip that you can put anywhere. The convenient brackets let me mount it upside down on my desk and out of sight. % plugs, with one to accommodate a large plug-in power supply and USB ports.
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Reviewed in the United States on May 4, 2026

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