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Description
SounDigital - 400.4 XPAt the pinnacle of performance and innovation, we proudly present the XP linean impressive evolution in your audio experience. Designed with state of the art technology and enhanced by artificial intelligence, XP amplifiers embody the core DNA of SounDigital innovation, excellence, and precision. The XP line delivers exceptional audio performance, combining advanced engineering with superior components to ensure reliability and remarkably faithful
At the pinnacle of performance and innovation, we proudly present the XP line—an impressive evolution in your audio experience. Designed with state-of-the-art technology and enhanced by artificial intelligence, XP amplifiers embody the core DNA of SounDigital innovation, excellence, and precision.
The XP line delivers exceptional audio performance, combining advanced engineering with superior components to ensure reliability and remarkably faithful sound clarity. Its compact and versatile design allows seamless integration into a wide range of applications, meeting diverse needs with efficiency and practicality.
Whether you’re an audiophile or a casual listener, XP amplifiers elevate your audio experience, striking the perfect balance between cutting-edge technology and exceptional quality. With the XP line, hear sound as it was meant to be heard.
SD 400.4 XP – 4Ω
Power @ 4Ω: 4 X 66 WRMS
Power @ 2Ω: 4 X 100 WRMS
Power @ 1Ω: N/A
Bridge Power @ 8Ω: 2 X 132 WRMS
Bridge Power @ 4Ω: 2 X 200 WRMS
Bridge Power @ 2Ω: N/A
Operating Voltage: 9V – 16V
Current Draw (Music): 17 A
Current Draw (Max): 34 A
Recommended Fuse (Music): 20 A
Frequency Response (-3dB): 5Hz – 36kHz
SNR: 96dB
Crossover HPF: 45Hz – 850Hz
Crossover LPF: 45Hz – 850Hz
THD + N (10% Rated Power): 0.1%
Recommended Battery: 40aH
Power Cable: 7AWG
Speaker Cable: 15AWG
Product Dimensions: 4.69 x 4.44 x 2.0 in
Product Dimensions: 11.9 x 11.3 x 5.0 cm
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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 10 reviews
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Product Reviews
★★★★★ 5
It's a really nice story about how we all have different ways of ...
A new acquaintance recently introduced me to "Frederick," a charming, very short children's picture book about a family of field mice who are preparing for the winter. One of them, a young mouse named Frederick, does not do much work and appears to be shirking his responsibilities. Frederick explains to his skeptical family that he IS working by quietly gathering imaginary sun rays for the cold winter days to come.
The book ends with the mice experiencing a tough winter, and then being inspired to carry on by a poem Frederick has created that grew out of his meditations when his family members thought he was being lazy. It's a really nice story about how we all have different ways of making contributions, and that important work is not always readily visible, especially creative endeavors.
The book also has some exercises for children, including one that guides a participant into writing a poem. If you read this story to a child and then make a poem together, it'll make a sweet project! A few of the words in the story are a bit advanced for young children, which offers a nice vocabulary building opportunity and does not detract from the story.
What I like best about "Frederick" is that it acknowledges that we humans are not all the same, and that we need our different talents and personalities to "make it through the winter." It might be especially nice to share with that child in your life who "marches to the beat of a different drummer."
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Reviewed in the United States on January 29, 2015
★★★★★ 4
Good read!
Format: Hardcover
Fredrick is a cute story about a mouse and his friends preparing for winter ! The illustrations are fun!
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Reviewed in the United States on February 28, 2025
★★★★★ 5
A childhood classic
Format: Hardcover
Great book for children.
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Reviewed in the United States on October 22, 2025
★★★★★ 5
so sweet
Format: Hardcover
cutest little book, that i didn’t know existed until recently. my dad’s name is Frederick, and he has passed, so the story felt very endearing and comforting to me. <3
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Reviewed in the United States on October 19, 2025
★★★★★ 5
Five Stars
Format: Hardcover
Just another good piece to add to my collection. Awesome was excited to get it.
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Reviewed in the United States on December 20, 2014