Matrix Audio

Matrix Mini-i Pro 4 Music Streamer (Apos Certified Refurbished)

$815.15 $959

Request A Price Match

This is an Apos Certified product. That means it's refurbished, like new, eligible for our 45-day return policy, carries an Apos Certified One-Year Warranty, and ships from our US facility. Currently, Apos Certified products are only available to customers with a US shipping address. We appreciate your understanding as we aspire to expand our offerings to a broader audience in the future.

Experience the Future of Music Streaming

Welcome to the Matrix mini-i Pro 4 Music Streamer, a device that's more than just your average DAC. Combining stellar digital audio processing capabilities with extensive network streaming support, this all-in-one music streamer sets a new standard for high-fidelity audio. Paired with our proprietary MA player and controller app, the MA Remote App, the mini-i Pro 4 seamlessly streams high-quality online music, immersing you in a rich, uninterrupted audio experience.

A new standard for sound quality

Built around the latest ES9039Q2M D/A chip from ESS, the mini-i Pro 4 delivers unparalleled performance, regardless of the music genre. Its carefully tuned audio circuits, high-quality audio components, and optimized circuit layout result in a high SNR and extremely low distortion. This ensures your favorite tunes always hit the right note, maintaining their original texture and depth.

The joy of balanced audio

The mini-i Pro 4 boasts a fully balanced amplifier circuit and dual output ports (a 6.35mm single-ended output and a 4.4mm balanced output). This flexible connectivity pairs with the device's ability to drive various high-impedance headphones effortlessly, ensuring your listening experience remains pristine and interference-free.

User-friendly, every step of the way

The mini-i Pro 4 features a 3.46-inch LCD touch screen for easy operation. The high-resolution display showcases track metadata and device status, while the MA Remote App and RM5 remote control simplify your interactions with the device. You'll find it easy to lose yourself in a world of diverse music sources and a delightful audio experience.

MA Player - Your audio control center

The MA Player is a top-notch digital audio/streaming playback control system, allowing you to operate and control the mini-i Pro 4 from any device on your local area network. With built-in support for Roon Ready (certification undergoing), DLNA/UPnP, AirPlay 2, Spotify Connect, and TIDAL Connect, the MA Player brings high-resolution streaming audio right to your fingertips.

MA Remote App - Command from your palm

Designed for iPhone, iPad, and Android devices, the MA Remote App puts you in the driver's seat. Browse and play high-resolution online audio from TIDAL, Qobuz, and HIGHRESAUDIO, adjust hardware settings, and even check and install new firmware for your mini-i Pro 4. All from the comfort of your handheld device.

Local music? No problem

The mini-i Pro 4 supports playback from USB storage devices and NAS, indexing your music library based on these storage sources automatically. Your music files are organized under "Library" in the MA Remote App, allowing you to browse your collections based on various categories. Searching for that specific track just became a whole lot easier.

Internet radio, at your service

With support for Internet radio from vTuner and Radio Paradise, the mini-i Pro 4 brings global music and talk shows right into your living room. All you need is an Internet connection and the MA Remote App, and you're good to go.

High-quality USB DAC

The mini-i Pro 4 doubles as a high-quality USB DAC, supporting a wide range of audio formats and sampling rates. Whether you're connecting to computers, smartphones, or tablets, you're assured of top-tier audio performance.

Your TV never sounded this good

The mini-i Pro 4 features an HDMI ARC input port, enabling you to transmit audio signals from your TV or projector. This means clearer, more realistic audio while you're catching up on your favorite shows or movies. Plus, with support for CEC, controlling the power on/off, volume, and playback of your mini-i Pro 4 and display device has never been easier.

All-round compatibility

With S/PDIF optical and coaxial input interfaces, the mini-i Pro 4 handles S/PDIF signals within the range of PCM 44.1-192kHz and DSD64 in DoP mode. This broad compatibility enhances your audio decoding experience, immersing you in high-quality sound.

An old friend, a new age

The mini-i Pro 4 isn't just for digital audio or streaming playback. With a set of RCA analog inputs offering three input gain levels, you can connect traditional analog audio devices too. No matter your source, the mini-i Pro 4 guarantees excellent audio performance and convenient operation.

Wired or wireless? You choose

The mini-i Pro 4 features a Gigabit Ethernet connection and dual-band Wi-Fi, ensuring your audio data is transmitted quickly and smoothly. Whether you prefer a wired or wireless setup, your music always arrives in style.

Total control, in your hand

The RM5 remote control, designed specifically for the mini-i series, brings a blend of sturdiness and elegance to your fingertips. With a newly added programmable button, you can add a shortcut to your frequently used function. Take control of your audio content like never before.

Product highlights

  • High-quality ES9039Q2M D/A chip
  • Fully balanced amplifier circuit
  • Dual output ports (6.35mm and 4.4mm)
  • 3.46-inch LCD touch screen
  • High-resolution streaming with MA Player
  • MA Remote App for iPhone, iPad, and Android
  • Playback support from USB storage devices and NAS
  • TIDAL, Qobuz, and HIGHRESAUDIO streaming support
  • Internet radio support from vTuner and Radio Paradise
  • High-quality USB DAC
  • HDMI ARC input port
  • S/PDIF optical and coaxial input interfaces
  • RCA analog input with three input gain levels
  • Gigabit Ethernet and dual-band Wi-Fi
  • RM5 remote control with programmable button


  • CPU: Quad Cortex-A55 2.0GHz
  • D/A chip: ES9039Q2M
  • Coaxial & optical: 
    • PCM 16-24Bit /44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
    • DSD 2.8MHz (DoP)
  • HDMI ARC: PCM 16-24Bit /44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
  • USB audio: 
    • PCM 16-24Bit /44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz, 705.6kHz, 768kHz
    • MQA 16-24Bit /44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz MQA or MQA Studio stream
    • DSD 2.8MHz, 5.6MHz, 11.2MHz (DoP)
    • DSD 2.8MHz, 5.6MHz, 11.2MHz, 22.4MHz (Native)
  • Line output XLR
    • SNR: 127dB A-weighting
    • THD+N:<0.00008%@1k, <0.00010%@20Hz-20kHz
    • Frequency Response: 20Hz-20kHz ±0.1 -3dB@90kHz
    • Channel Crosstalk: >-146dB
    • Output Level: 4.4VRMS@0dB
  • Line output RCA
    • SNR: 121dB A-weighting
    • THD+N:<0.00015%@1k, <0.00020%@20Hz-20kHz
    • Frequency Response: 20Hz-20kHz ±0.1 -3dB@90kHz
    • Channel Crosstalk: >-133dB
    • Output Level: 2.2VRMS@0dB
  • 4.4mm headphone output
    • SNR: 117dB A-weighting
    • THD+N:<0.0004%@20Hz-20kHz 4VRMS
    • Frequency Response: 20Hz-20kHz ±0.1 -3dB@90kHz
    • Output Impedance:<22Ω
    • Output Power: 2200mw@33Ω, 950mw@300Ω, 500mw@600Ω, 1%THD
    • Gain: +14dB
  • 6.35mm unbalanced headphone output
    • SNR: 116dB A-weighting
    • THD+N:<0.0005%@20Hz-20kHz 2VRMS
    • Frequency Response: 20Hz-20kHz ±0.1 -3dB@90kHz
    • Output Impedance:<11Ω
    • Output Power: 1200mW@33Ω, 260mW@300Ω, 130mW@600Ω, 1%THD
    • Gain: +14dB
  • Aux input
    • SNR: 100dB A-weighted
    • THD+N: <0.0035%@1k, <0.0035%@20Hz-20kHz
    • Frequency response: <0.0035%@20Hz-20kHz
    • Channel crosstalk: >-105dB
    • Input level: 2.1VRMS Maximum
  • Network
    • LAN: 10/100/1000 Mbps
    • WLAN: 2.4 GHz / 5 GHz
  • USB Type C
    • The USB Type C port provides a maximum power of 5V/1.5A.
    • The USB port works with devices which conform to the USB mass storage standard and supports FAT, FAT32, exFAT and NTFS file formats, but is not guaranteed to be compatible with all storage devices.
  • MA player
    • Controller app: MA remote app
    • Local playback format supported: MP3 , WMA , WAV , AIF, AIFC, AIFF, AAC, FLAC, OGG, APE, ALAC, M4A, DSF, DFF, CUE
    • PCM sampling rate: 
      • PCM 16-24Bit 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz, 705.6kHz, 768kHz
      • MQA  16-24Bit /44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz MQA or MQA Studio stream
    • DSD sampling rate: 2.8MHz, 5.6MHz, 11.2MHz, 22.4MHz
    • Roon Ready: Under certification test
    • PCM sampling rate: 
      • PCM 16-24 Bit /44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz, 705.6kHz, 768kHz
      • MQA  16-24 Bit /44.1 kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz MQA or MQA Studio stream
    • DSD sampling rate: DSD 2.8MHz, 5.6MHz, 11.2MHz, 22.4MHz
  • Power specs
    • Power voltage: AC 100V-240V 50/60Hz
    • Standby power consumption: <5W
    • Maximum power consumption: <30W
  • Weight and size
    • Weight: 2.87 pounds
    • Size: 8.8” width, 7.32” depth, 2.07” height

What’s included

  • Matrix mini-i Pro 4
  • RM5 remote control
  • Power cable
  • Quick start guide
  • Warranty card
Apos Certified

Recently viewed