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X4K.1
X4K.1
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X4K.1

Marsoni M251S
Sale price$699.50
Pay 4 payments of $174.88 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
X4K.1In Store Pick Up Only Highlights 4,000 Watt Class D Mono Block Upgraded with Larger Package Mosfets for Increased Avalanche Current Upgraded with Lower ESR Capacitors Upgraded Heatsink to Industry Leading Surface Area and Weight Linkable Master Slave Configurable Dual MOS FET PWM power supply Click in Place Crossover Controls Subsonic and Low Pass Filters Variable Phase Control Tiffany Style RCA Connectors Remote Bass Control w Clip Indicator and
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Quick Dispatch:

Your X4K.1 orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

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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.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 257 reviews
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Product Reviews
M
Verified Purchase
mike
Massapequa, US
★★★★★ 5
Great ball for heavy chewers
Style: Assorted Balls (Pack of 3), Size: 2.5 inch
Great toy for my Doberman. She chews through tennis balls in about 15 minutes but these are very durable. She likes to chase them but also just chew on them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
M
Verified Purchase
Me
West Palm Beach, US
★★★★★ 5
Durable
Style: Fetch Balls (Pack of 2), Size: 3 inch
Very bouncy. I like the noise it makes when you throw it. Pretty durable. Good size. Dog loves to play with them. Good material. Easy to use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
S
Verified Purchase
Susan Cedar
Belleville, US
★★★★★ 4
My dog loves glowing fetch at night!
Style: Glow Balls (Pack of 3), Size: 2.5 inch
Fantastic. Sturdy. My dog loves them Glow in the dark is great for fetch at night. I keep a flashlight with me because the glow doesn't last really long. But they charge very quickly and are really bright.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 22, 2026
M
Verified Purchase
Maddox
Chelsea, US
★★★★★ 5
Indestructible
Style: Fetch Balls (Pack of 2), Size: 3 inch
These balls are indestructible! We have a lab and a lab mix and they CANNOT damage these balls. They love them for fetch and to just chew on them (slightly squishy, but NO damage). Best toys we have bought for them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
A
Verified Purchase
Animal Lover
Los Angeles, US
★★★★★ 5
Great trial set. Just be careful throwing the orange one!
Style: Assorted Balls (Pack of 3), Size: 2.5 inch
Blue isn't that easy to see in the yard White charges with bright light/UV and is truly a game changer for night-time fetch. Both dogs clearly favor it. Orange is easy to see in the grass at day They're 3 different weights as well, so double trial. I prefer medium for my big dogs, though light performs well too The orange is HEAVY and unyielding. Do NOT throw it with a ball thrower. It could damage your house or knock your dog out. Seems tough though.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 16, 2026

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