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Home Products SMSL DO400 Full Balanced Headphone Amplifier DAC Amp ES9039MSPRO XU-316 USB MQA DAC USB/Bluetooth/AES/Optical/Coaxial/IIS Input 4.4mm/6.35mm/4-XLR Jack Output Headphone Amp, Black
New SMSL DO400 Full Balanced Headphone Amplifier DAC Amp ES9039MSPRO XU-316 USB MQA DAC USB/Bluetooth/AES/Optical/Coaxial/IIS Input 4.4mm/6.35mm/4-XLR Jack Output Headphone Amp, Black
Seller Information: Sold by: HIFI SOUND AUDIO-UK

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The SMSL DO400 Full Balanced Headphone Amplifier DAC is ideal for audiophiles and music professionals seeking high-quality sound reproduction. With its ES9039MSPRO DAC and multiple input options including USB, Bluetooth, AES, Optical, and Coaxial, it caters to a diverse range of audio sources. The balanced output options (4.4mm, 6.35mm, and 4-XLR) ensure compatibility with various headphones, making it suitable for both studio use and personal listening. Its ability to support MQA decoding further enhances its appeal to those who appreciate high-resolution audio formats, setting it apart in the competitive market of headphone amplifiers.

Key Features
DAC Chip
ES9039MSPRO
Input Options
USB, Bluetooth, AES, Optical, Coaxial, IIS
Output Options
4.4mm, 6.35mm, 4-XLR
Colour
Black
Price
£429.00
MQA Support
Yes
Use & Care

This headphone amplifier is best used in a controlled audio environment, such as a home studio or dedicated listening room. It is designed to accommodate various headphone types, so compatibility should be verified based on output specifications. To maintain performance, avoid exposure to moisture and keep the unit clean using a soft cloth. The package includes the amplifier and necessary cables for connection.

SMSL DO400 Balanced Headphone Amplifier DAC with USB/Bluetooth, Black, 4.4mm/6.35mm/XLR Outputs

£429.00
Price updated on: 22/03/2026 at 12:40
Price History
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Key Takeaway

Experience high-fidelity audio like never before with this full balanced headphone amplifier and DAC, designed to elevate your listening experience for just £429.00. Featuring advanced connectivity options including USB, Bluetooth, AES, Optical, and Coaxial inputs, it’s perfect for audiophiles seeking superior sound quality and versatility. With multiple output options, including 4.4mm, 6.35mm, and 4-XLR jacks, this sleek black amplifier is an essential addition to any serious music lover's setup.

Frequently Asked Questions

What is SMSL DO400 Full Balanced Headphone Amplifier DAC?

The SMSL DO400 is a full balanced headphone amplifier DAC that features the ES9039MSPRO chip. It supports various input types including USB, Bluetooth, AES, Optical, Coaxial, and IIS, making it versatile for high-quality audio playback.

How much does SMSL DO400 cost?

The SMSL DO400 is priced at £429.00. This price reflects its advanced technology and high-quality sound performance, making it a valuable investment for audiophiles.

What are the key features of SMSL DO400?

Key features of the SMSL DO400 include MQA decoding, multiple output options such as 4.4mm, 6.35mm, and 4-XLR jack, and a robust design for enhanced audio fidelity. It also offers a variety of input connections for flexibility.

Who is SMSL DO400 best for?

The SMSL DO400 is best suited for audiophiles and music producers who demand high-quality sound and versatility in their audio equipment. It is ideal for those who use various audio sources and require a powerful headphone amplifier.

How do I use/care for SMSL DO400?

To use the SMSL DO400, connect it to your audio source via the desired input and select the appropriate output for your headphones. For care, keep the device in a cool, dry place and avoid exposing it to extreme temperatures to maintain optimal performance.

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