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SMSL AS400 Hi-Res DAC Power Amplifier Headphone AMP

SMSL AS400 Hi-Res DAC Power Amplifier Headphone AMP

Regular price $285.00 USD
Regular price $285.00 USD Sale price $285.00 USD
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SMSL AS400 Hi-Res DAC Power Amplifier Headphone AMP


Key Features:

  • Versatile Connectivity: Equipped with 7 inputs including USB, Bluetooth (LDAC/aptX HD), Optical, Coaxial, HDMI(ARC), Phono, and Line for flexible connection to multiple devices.
  • Powerful Amplification: Infineon MA5332MS Class D amplifier delivers up to 165W ×2 at 4Ω with ultra-low distortion of just 0.003%.
  • Hi-Res DAC: Features Cirrus Logic CS43131 DAC chip for high-fidelity decoding, achieving a signal-to-noise ratio (SNR) of 107dB for exceptional clarity and detail.
  • Advanced USB Processing: Incorporates the 3rd generation XMOS XU-316 for PCM up to 32bit/768kHz and DSD up to DSD256.
  • Full MQA Decoding: Supports full MQA decoding through USB, Optical, and Coaxial inputs, ensuring studio-quality audio playback.
  • Flexible Headphone Output: Provides both 4.4mm balanced and 6.35mm single-ended headphone outputs to match various headphones.
  • Phono Stage Built-in: Includes an MM phono amplifier stage for connecting vinyl turntables directly.
  • HDMI ARC Support: Easily integrate your TV with HDMI ARC, simplifying cable connections and delivering high-quality audio directly from your TV to your Hi-Fi system.
  • User-Friendly Design: CNC-machined aluminum chassis, selectable display colors, and full-function remote control with independent bass/treble adjustment and 5 professional filters.

Technical Specifications:

Inputs RCA / Bluetooth / USB / Optical / Coaxial / Phono / I2S / HDMI ARC
Output Power (RMS) 165W ×2 (4Ω), 85W ×2 (8Ω)
THD+N 0.003%
SNR 107dB
Channel Separation 98dB
USB Transmission Asynchronous Transfer
Power Consumption 40W (Normal Volume)
MQA Decoder USB / Optical / Coaxial
USB Compatibility Windows 7/8/8.1/10/11, Mac OSX, Linux
Bit Depth USB: 1bit, 16~32bit; Optical/Coaxial: 1bit, 16~32bit
Sampling Rate USB PCM: 44.1~768kHz, DSD: 2.8224~11.2896MHz; Optical/Coaxial PCM: 44.1~192kHz, DSD: DSD64 (DoP)
Dimensions (WxHxD) 210.4 × 46 × 254 mm
Weight 1.568 kg / 3.46 lbs

Package Includes:

  • SMSL AS400 Amplifier ×1
  • Remote Control ×1
  • Power Cable ×1
  • HDMI ARC Cable ×1
  • User Manual ×1


Shipping & Returns

  • Free Standard full searchable Shipping
  • DDP(Delivered Duty Paid) Services, No payment on receiption
  • Free 7-Day Return Policy!

⚠️ Important Notice: EU Customs Reform Effective 1 July 2026

A new tariff system will take effect across all 27 EU member states starting 1 July 2026. The EU is abolishing the duty exemption for low-value parcels — all goods entering the EU will now be subject to customs duties, including a fixed duty of €3 per HS tariff code category for IOSS-declared goods under €150.

A handling surcharge of USD $5 has been applied to all standard shipments to EU countries on orders under $500. Orders over $500 qualify for free expedited shipping.


Shipping Fees & Couriers

We collaborate with the following courier companies:

  • Standard Shipping: Yunexpress, 4PX, NinjaVan
  • Special Country Channels: India – Yitong Express | United Kingdom – Royal Mail | Japan – Sagawa Global Transportation
  • Express Shipping (orders over $500 ship free): DHL Express, FedEx, UPS, SF Express

In the event that a shipment is refused, undeliverable, or returned to sender, HiFiCat will process a refund to the original payment method. If a customer requests reshipment, a reshipment fee will apply. A restocking fee of up to 20% may also apply.


Shipping Rates & Estimated Delivery Times

1. France, Germany, United Kingdom, Italy, Spain, Poland

All taxes and duties are prepaid (DDP). 5–10 working days. Free standard shipping.

Tracking examples:

2. EU 27 Countries (Standard Shipping)

Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Cyprus

All taxes and duties are prepaid (DDP). 10–15 working days.
💰 Shipping cost: $5.00 USD (orders $0–$500) | Free (orders $500+, via DHL Express)

Tracking examples:

3. Other European Countries (Free Standard Shipping)

Norway, Switzerland, Ukraine, Armenia, North Macedonia, Moldova, Monaco, San Marino, Vatican City, Serbia, Albania, Kosovo, Montenegro, Bosnia & Herzegovina, Belarus, Georgia, Andorra, Guernsey, Jersey, Faroe Islands, Svalbard & Jan Mayen, Guadeloupe, Réunion, Gibraltar, Isle of Man, Mayotte, Iceland, Liechtenstein, Turkey

All taxes and duties are prepaid (DDP). 10–15 working days. Free standard shipping.

4. Americas

5. Oceania

6. Asia


Track Your Order

Main tracking portal: https://t.17track.net/


Contact Us

📧 Email: support@thehificat.com
📞 Tel: +8619270016096

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