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SMSL DO300EX Hi-Res AK4191+AK4499EX Audio Decoder & Headphone Amplifier

SMSL DO300EX Hi-Res AK4191+AK4499EX Audio Decoder & Headphone Amplifier

Regular price £320.00 GBP
Regular price £372.00 GBP Sale price £320.00 GBP
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Model: SMSL DO300EX
Input: USB/Optical/Coaxial/Bluetooth/12S
Output: RCA/XLR/4.4mm+6.35 Headphone Jack
Line outputamplitude: XLR 5.2Vrms/RCA 2.5Vrms
Headphomeoutput power:2w x2(16Ω),1W ×2(32Ω)
Standby power:<0.5w
Size:222×39×207mm (WxHxD)

Introducing the SMSL DO300EX Hi-Res Audio Decoder & Headphone Amp

New Exterior Design

Experience the future of audio with the DO300EX, featuring a stunning floating display window design. Its tempered glass fully bonded color IPS display screen not only adds a touch of elegance but also supports independent DOP display function. Accurate decoding format judgement is now at your fingertips, complemented by the retro function knob design.

Flagship DAC Chip AK4191+AK4499EX

Unleash the power of AKM's flagship DAC chip, the AK4191+AK4499EX, within the DO300EX. Enjoy MQA hardware decoding and an astonishingly low distortion rate of 0.00006% (-124dB), delivering unmatched audio purity and precision.

New 3rd Generation XMOS XU-316

Experience uncompromising quality and performance with the DO300EX's utilization of the third-generation XMOS XU-316. With its 16 core high-end independent control chips and 5*0PA1612A, rest assured that every audio detail is handled with finesse.

Rich Input and Output Interfaces

Embrace versatility with a range of input and output options. The DO300EX offers 5 inputs including USB, Bluetooth, Optical, Coaxial, and I2S (HDMI), allowing you to connect your preferred source effortlessly. It also features 2 headphone outputs (4.4mm, 6.35mm), 2 Line Outputs (XLR, RCA), and even includes a PRE MODE for added flexibility.

4.4mm/6.35mm Headphone Interface

Enhance your listening experience with the integrated high-performance stereo headphone amplifier. The front panel features a 6.35mm single-ended headphone interface and a 4.4mm balanced headphone interface, providing ample thrust for different headphone types, including 16Ω 2000mW x 2 and 32Ω 1000mW x 2.

MQA-CD Support

Immerse yourself in audio perfection with MQA-CD support. This advanced encoding technology maintains the highest quality while preserving intricate details and dynamic range, ensuring an authentic and immersive listening experience.

Low Noise Stabilized Power Supply

Built with a focus on efficiency and reduced power consumption, the DO300EX boasts a low noise power processing system. Enjoy enhanced audio quality while optimizing energy usage.

Qualcomm QCC5125 Bluetooth Chip

With the Qualcomm Bluetooth 5.1 chip, LDAC 24bit/96kHz, APTX/HD, SBC, and AAC are all supported. Connect seamlessly to your wireless devices without compromising audio quality.

Full Function Remote Control

Take command of your audio experience with the included SMSL remote control. Crafted for superior feel and quality, it offers full function control, allowing you to tailor your sound to perfection.



What's in the Box?

Shipping & Returns

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

Shipping Fees

Worldwide Free Shipping on Hificat, Please allow 1-3 business days for conduct Quality Control in order to ensure the products quality.

In the event that a shipment is refused delivery by the recipient, is undeliverable, or is returned to sender, Hificat will process a refund to the original payment method used.

If a customer would like the order reshipped, they’ll be charged a reshipment fee. Customers may also be subject to a restocking fee of up to 20 percent of the product cost.


Which Couriers To Use?

We collaborate with these courier companies:
Standard Shipping: Yanwen Express
Express Shipping(over $500 can be free): DHL Express, FedEx and SF Express

Hificat has extensive global logistics experience to ensure quality logistics services to consumers.

HiFiCat offers consumers different shipping, depending on the country, a choice of different shipping methods.


Estimated Delivery Time

1. France, Germany, UK, Italy, Spain, USA.

All taxes and duties are prepaid to the carrier by HiFiCat prior to shipping, so there are no taxes or duties to pay when you receive it. 6-10 days to arrive.

Tracking Example



United Kingdom:



United States:

2.EU Country:Filand, Poland, Estonia, Norway, Switzerland, Greece, Sweden, Israel, Czech Republic, Slovenia, Slovakia, Denmark, Netherlands, Latvia, Croatia, Austria, Hungary, Belgium, Bulgaria, Romania, Ireland, Malta, Iceland, Serbia and so on.

All taxes and duties are prepaid to the carrier by HiFiCat prior to shipping, so there are no taxes or duties to pay when you receive it. 10-15 days to arrive.









Czech Republic:


















Russian Federation

3.South America:Peru, Brazil, Chile



South Africa:


New Zealand:


5.Canada By Canada Post, about 2 weeks.
6. Asia:
Japan By Japan Sagawa Global Transportation. About 7 days.
Thailand By jt express. About 5-7days.
Malaysia by jtexpress.My  About 5-7days.
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Customer Reviews

Based on 1 review
Herbert NK
very good DAC

In terms of operation and settings, this DAC is absolutely top. It has a great display, everything is very easy to read, even from a distance, it's really the best thing I've seen so far. The remote control is also absolutely great. I can't quite judge the sound yet, I've only just started using the DAC. A comparison with a topping E70Velvet depends a bit on the amplifier. So I have a Rotel in the living room and an Advance Paris in the office. The topping works better with the Advance Paris, it sounds fuller, warmer and deeper. With the Rotel, the sound is fairly balanced between the two DACs. But as I said, that's my first impression, I would need at least a rainy weekend for a more detailed analysis. All in all, it's great and the I2S input is still there, which I still have to try. First I connected an SMSL SD-9 to the DAC and the sound is very good. I have to test whether it has any advantages over USB, but my first impression was that the sound is fuller, with a bit more detail.