Out Of Stock SMSL M2 - M2

SMSL M2 MAX9722 Portable Headphone Amplifier ES9023+ SA9027 DAC USB Decoder


  • MINI computer USB decoder (External sound card).
  • Uses asynchronous audio transmission technology .
  • Supports ASIO, WASAPI drive.
  • Also have the line output, optical signal output and Headset amplifying output.
  • Using purified computer power supply directly, very convenient to use.
  • Ultra small size (thickness, width as the iPhone 4S), easy to carry.
  • You enhance the computer sound choice. 

USB receiver chip: SA9027

  • SA9027 is a high performance audio stream processors, USB full speed compatible. Focus on the SA9027 also supports asynchronous mode, so the local clock to reduce the output jitter,: DSD2PCM play; support for Apple feedback mode (Apple comes with drivers, no need to install) it contains a set of stereo playback and recording channels and a set of IEC60958 S / PDIF transceiver channel. SA9027 is an ideal choice for stereo digital audio interface applications. Its resolution and sample rate can be configured separately for the 16/24 bit and 32 / 44.1 / 48 / 88.2 / 96KHz.

DAC decoder chip: ES9023

  • ESS's ES9023 is a 24bit stereo audio digital-analog converter chip (DAC), and the king's ES9018 chip with a door, integrated chip 2Vrms output driver amplifier. Uses the industry's advanced digital SABRE - analog conversion technology, the chip set the best sound quality, cost-effective in one, making it ideal for digital to analog conversion. Can be used in Blu-ray player, CD / DVD, HD set-top boxes, digital TV or audio receiver equipment and other products. 
  • ES9023 internal use patented ultra-stream (Hyper stream) architecture and time-domain jitter elimination technology, making it possible to achieve record levels of jitter-free sound quality, dynamic range up to 112dB. 
  • Because the chip integrates a charge pump can generate a negative voltage, ES9023 can refer directly to the output ground 2Vrms, eliminating the coupling capacitor DC voltage isolation in a single power supply. Moreover, the output amplitude according to actual needs, set by the resistance less than 2Vrms level. Noise can also switch to full suppression. Dedicated control / status pin allows the microcontroller to control in the absence of circumstances easily integrated into the system.

Headphone amplifier chip: MAX9722

  • MAXIM (Maxim) MAX9722 stereo headphone amplifier is limited board space for portable devices Design.
  • MAX9722 uses a unique, patented Direct Drive architecture, in order to produce a single supply Ground-referenced output, eliminates the need for large-capacity DC-blocking capacitors, saving board space and component Height. 
  • Integrated noise suppression circuitry, a comprehensive noise suppression circuit during startup and shutdown process can be inhibited clicks 

Sound and crackling. 

  • Low-power shutdown mode reduces supply current to 0.1μA. 
  • Each channel can be provided to a 16 ohm load or 32 ohm load power 70mW or 130mW power, and only 0.009% THD + N. 
  • 217kHZ frequency with 80dB power supply rejection ratio (PSRR), so the device can work in a noisy few under the word power, no power linear regulator.
  • Sample rate: 32~96KHz (including 88.2KHz)
  • Width: 16~24Bit
  • USB transmission specifications: USB2.0, asynchronous audio transmission
  • THD+N:DAC <0.003% amp <0.005%
  • Frequency response: 10Hz~48KHz
  • Impedance adaptation: 8 Ω ~600Ω
  • The maximum output power: 130mW + 130mW / 32.Ω
  • Dynamic range: 110dB (24Bit)
  • Signal to noise ratio: DAC>105dB amp >100dB
  • The output amplitude: 2Vrms
  • Power consumption: <0.5W
  • Size: 87 X 58.5 X 9.6mm


  • SMSL M2 headphone amp
  • USB Cable

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Due to the impact of the COVID-19 pandemic, global international shipping will delays. The delay at our Hong Kong post office is very serious, so we have changed to other fastest or most efficient international shipping. Now the normal estimated delivery time may be delayed by about 1-2 weeks. In some countries where is higher free-tax rate, we will provide free courier service as much as possible.

Free Shipping

All listed items will be shipped though Registered Airmail with tracking number if there is no extra shipping method option listed or shipping description in the product page.

Economy shipping: Will be shipped without tracking number.

Registered Airmail : Will be shipped via such as Hong Kong post , Deutsche Post , Netherlands Post , Singapore Post, you can leave us a message if you have any requirement about the shipping method .

It will be shipped via Hong Kong Post by default, Europe countries can choose to be shipped via Deutsche Post or Netherlands Post, it is also FREE, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx

  • Views: 13300
  • Brand: SMSL
  • Product Code: M2
  • Availability: Out Of Stock
  • $59.00

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Tags: SMSL M2, SMSL M2 MAX9722 Portable Headphone Amplifier ES9023+ SA9027 DAC USB Decoder Description MINI computer USB decoder (Extern, M2