S.M.S.L - D400 EX

Desktop Digital To Analog Converter (DAC)
Sale price₹ 91,999 Regular priceMRP: ₹ 94,999

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Talk to a Headphone Guru


1. What is a Pre-Order product?
A Pre-order product is a product that we especially order for you from the brand. Once you place an order with us, we will order it from the brand for you.

2. How do I know when the product will be delivered?
There is a rough timeline on the product availability and once it has been confirmed with the brand, we will inform you.

3. Do you order the product from the brand as soon as I place the order?
We do not immediately order the product but add it in the upcoming order.

4. Will you be giving me updates?
Once we have ordered the product and have a confirmed timeline, we will give you an update.

5. I’d like to make changes to/cancel my order?
You can only cancel/make changes to your order until we place the order with the brand. Since the product is specifically being ordered for you, we will be unable to cancel/make changes once we order the product from the brand.

Free Shipping
7 Day Replacement Guarantee

In case you receive the S.M.S.L - D400 EX with a manufacturing defect, please raise a return request within 7 days of delivery.

However, if you receive an incorrect / damaged / different product or one with missing accessories, please raise a return request within 24 hours of delivery. In case you receive a product with a missing, incorrect, or faulty accessory, you will be given a replacement accessory instead of the entire product.

Please make sure that the product is in the original packaging with all the accessories it came with. We'll also need an unboxing video and images of the parcel to investigate about the discrepancy. You may be asked to share images of the product and the packaging received for us to determine the damage or defect prior to approving the return request. The free replacement will be shipped only once the original order is returned.

A replacement will be issued only if:

- It is found to be defective
- It is determined that the product was not damaged while in your possession
- The product is not different from what was shipped to you
- The product is returned in original condition (with brand’s/manufacturer's box, MRP tag intact, user manual, warranty card and all the accessories therein)


Warranty & Services

Don't sweat it, this S.M.S.L - D400 EX comes with a 1 Year warranty from S.M.S.L that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about S.M.S.L's warranty in India.

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1 Year of

Ideal for Audiophiles

These DAC & Amps are designed for discerning music lovers. If audio quality is important to you, a set of DAC & Amps like these would be ideal.

You can expect these DAC & Amps to present you with a refined listening experience. The audio quality exhibited by these DAC & Amps is a beautiful mix of musicality, technical brilliance and high precision.

These DAC & Amps deliver a spacious & open soundstage that makes you feel you are sitting at a live concert. Experience the magic and delve into pure sonic tranquility!

Ideal for
Desktop Use

For Studio & Professionals

As the name implies, anything branded as studio headphones is designed especially for a studio setting with a particular focus on accuracy and transparency for monitoring and mixing.

These headphones present an accurate image of your music than ordinary headphones, allowing you to hear every nuance and aspect of your music. Therefore, having a good set of studio headphones is just as important as any other gear in your studio.

These headphones provide a fresh perspective to that mix you’ve spent hours mastering and recording, essentially giving you another set of ears.

Bluetooth with LDAC,
aptX HD, aptX & AAC

XLR Balanced


AKM 1x AK4191 + 2x AK4499EX
DAC Chip

Pair with Laptop via USB

A majority of people use a laptop as the primary source device to listen to music or watch movies. Since the laptop is an essential part of the audio chain there are headphones and devices designed to work a laptop or computer system flawlessly. With the availability of USB connectivity, it becomes easier to pair various devices like an Amp, DAC or even headphones without worrying about drivers or any additional piece of software.

Connect With USB, Optical,
Coaxial, I2S & AES

Volume Controls

If your DAC & Amps include volume controls or volume rockers, you can easily change the volume with a button press or volume knob turn.

DAC & Amps that have volume controls make its operation incredibly simple; turn up the volume on your smartphone or your source devices and then change the volume on DAC & Amps to the desired level.

This design feature allows you to have complete control over the desired volume according to your listening preferences.


SMSL D400 EX is a brand-new flagship Desktop DAC designed with the latest-generation dual AK4499EX + AK4191 32-bit "flagship" DAC chips. It adopts the 3rd generation XMOS XU316 USB Processor, along with nine high-end OPAMP chips delivering unprecedented audio performance. The SMSL D400 EX supports all leading audio formats with support for decoding high-resolution PCM, native DSD, and MQA audio signals. It is an MQA and MQA-CD-certified premium Desktop DAC. The SMSL D400 EX can decode PCM (Pulse Code Modulation) up to 32bit/768kHz and DSD512 (Direct Stream Digital). It has a unique dual Mono design with one AK4499EX DAC chip per channel which helps keep distortion as low as 0.00006%. The SMSL D400 EX is also Hi-Res certified by JAS.
Hi-Res Audio

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Headphone-Zone-S.M.S.L-D400 EX
Headphone-Zone-S.M.S.L-D400 EX


The SMSL D400 EX gets you covered if you want to enjoy wireless music. It features Qualcomm's high-end Bluetooth chipset. The SMSL D400 EX supports Bluetooth audio codecs like LDAC, aptX-HD, aptX, SBC, and AAC. With the latest Bluetooth codec support like LDAC, the SMSL D400 EX can play Hi-Res music up to 24bit/96kHz. The SMSL D400 EX is also MQA & MQA-CD certified. Enjoy wireless music like never before with the all-new SMSL D400 EX!

NOTE: To know more about MQA and how it improves or enhances the listening experience, refer to the FAQ section.

Headphone-Zone-S.M.S.L-D400 EX
Headphone-Zone-S.M.S.L-D400 EX


The SMSL D400 EX has audiophile-grade components in its circuitry. It has nine pieces of high-end dual op-amps and numerous quality components. The new self-developed CK-03 Clock Processing Unit helps reduce clock jitter. With a built-in low-noise power processing unit, the SMSL D400 EX provides a stable, low-noise power supply system. The SMSL D400 EX also has seven modes of digital filters allowing you to tweak the sound according to your preferences.

NOTE: To know more about digital filters, refer to the FAQ section.

Headphone-Zone-S.M.S.L-D400 EX
Headphone-Zone-S.M.S.L-D400 EX


The SMSL D400 EX is exquisitely crafted from aluminium. It has an all-aluminium alloy housing with anodic oxidation technology and chamfering process, which emanates a high-grade appearance. It also has a full lamination display with first-class texture highlighting the D400 EX's simplicity and beauty. It is combined with a fully laminated tempered glass display making it durable. The screen is vibrant and displays the sampling rate, the input selected, the volume level and much more. SMSL has included a fully functional remote allowing you to access various functions from the comfort of your couch.

Headphone-Zone-S.M.S.L-D400 EX
Headphone-Zone-S.M.S.L-D400 EX


The SMSL D400 EX is an elegant-looking device right out of the box. The front panel consists of a display screen, function knob, FN, menu, and power buttons. The rear panel consists of numerous inputs & outputs for scalability. It has RCA (Single-Ended) output and XLR (Balanced); as line output. It has an I2S coupled with USB, Optical, Coaxial, and AES/EBU as inputs. For the wireless connection, it has a Bluetooth antenna.

Headphone-Zone-S.M.S.L-D400 EX
1 Year Warranty

Don't sweat it, this S.M.S.L - D400 EX comes with a 1 Year warranty from S.M.S.L that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about S.M.S.L's warranty in India.

Unveiling Cutting-Edge Audio Technology

Established in 2009, Foshan ShuangMuSanLin Technology Co. Ltd. is based in Shenzhen, China. S.M.S.L specializes in audio equipment including DACs, stereo headphone amplifiers, and power amplifiers. With an in-house R&D, manufacturing, and marketing team, S.M.S.L has built an extensive sales network covering 33 cities in China. Additionally, S.M.S.L has developed strategic partnerships with several countries, including Japan, Britain, Germany, Portugal, and Singapore. Their products are exported to over 30 countries worldwide and have garnered high customer satisfaction.

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