SMSL AS400 Hi-Fi DAC Amplifier | Bluetooth, Phono, MQA

SMSL AS400 Hi-Fi Integrated DAC Power Amplifier

The SMSL AS400 is a premium all-in-one Hi-Fi integrated amplifier that combines a high-resolution DAC, a powerful digital power amplifier, a dedicated headphone amp, and a built-in MM phono stage — all in a beautifully crafted CNC-machined aluminum chassis. Whether you're spinning vinyl, streaming wirelessly, or watching TV, the AS400 delivers exceptional audio fidelity for the most discerning listeners.

Core Technologies

• Infineon MA5332MS Digital Amplifier (Germany) — delivers 165W×2 at 4Ω with an ultra-low THD of just 0.003% for clean, powerful sound.
• Cirrus Logic CS43131 DAC (USA) — renowned for its high-resolution audio decoding performance with up to 107dB Signal-to-Noise Ratio.
• JRC NJW1194A Volume Control Chip (Japan) — ensures precise, channel-balanced volume control at every listening level.
• 3rd-Gen XMOS Solution — supports PCM 32-bit/768kHz and DSD256 for the highest-resolution digital audio formats.
• Full MQA Decoding — unfolds MQA files via USB, Optical, or Coaxial inputs, including MQA-CD playback.

Versatile Connectivity — 7 Inputs

• USB (Type-A & Type-C) — hi-res computer audio playback up to PCM 768kHz / DSD256
• Bluetooth 5.0 with LDAC & aptX HD — wireless hi-res streaming from smartphones and tablets
• Optical & Coaxial — for CD players, streaming devices, and non-ARC TVs
• HDMI (ARC) — direct TV audio transmission for a clean home theater setup
• MM Phono Stage — built-in, ready for your turntable and vinyl collection
• Line Input — for any additional analog source

Headphone Outputs

• Dual headphone outputs: 4.4mm balanced + 6.35mm single-ended — drive a wide range of headphones with authority

User-Friendly Design

• CNC-machined aluminum chassis with anodized finish for a premium look and feel
• 8 selectable display colors with auto-dimming after 5 seconds
• Full-function remote control with independent Bass/Treble adjustment (±9dB) and 5 professional audio filters
• RCA outputs for connecting to powered subwoofers or additional amplifiers

Specifications

Why Choose the SMSL AS400?

The AS400 is engineered for audiophiles who demand flexibility without compromise. From vinyl enthusiasts to digital streaming devotees, this amplifier handles every source with finesse — making it the ultimate hub for a modern hi-fi system.

For more on high-resolution audio standards and digital audio technology, visit the National Institute of Standards and Technology (NIST).

Frequently Asked Questions

Q: Does the SMSL AS400 support high-resolution audio formats like DSD and MQA?

A: Yes. The SMSL AS400 supports PCM audio up to 32-bit/768kHz and DSD up to DSD256. It also features full MQA decoding via its USB, Optical, and Coaxial inputs, including compatibility with MQA-CD playback, making it ideal for hi-res audio enthusiasts.

Q: Can I use the SMSL AS400 with my turntable?

A: Absolutely. The AS400 includes a built-in Moving Magnet (MM) phono stage, so you can connect a standard turntable with an MM cartridge directly — no external phono preamp needed.

Q: What Bluetooth codecs does the SMSL AS400 support?

A: The AS400 supports Bluetooth 5.0 with LDAC (up to 990kbps) and aptX HD codecs, enabling high-resolution wireless streaming from compatible smartphones, tablets, and other Bluetooth audio sources.

Q: How many headphones can I connect at once?

A: The SMSL AS400 features dual headphone outputs — a 4.4mm balanced jack and a 6.35mm single-ended jack — allowing you to connect two headphones simultaneously or choose the output that best matches your headphones.

Q: Can the SMSL AS400 be used as part of a home theater setup?

A: Yes. The AS400 includes an HDMI (ARC) input for direct TV audio transmission, and also accepts audio from non-ARC TVs via its Optical or Coaxial inputs, making it an excellent choice for both dedicated hi-fi and home theater applications.