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Audio-Opus OPUS #11

Audio-Opus OPUS #11

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Ultra-Slim DAC/Amp for Smartphones

A portable amplifier and USB DAC rolled into one, the Audio-Opus OPUS #11 is designed to help you get better music out of your iOS or Android device. The gold-finished brushed aluminum body is smaller than the average smartphone and just 7.9 millimeters thick, ensuring it slides easily into your pocket and fits comfortably in your hand. Pair it with your favorite IEMs or full-size, low-impedance headphones, and enjoy up to 8 hours of playing time between charges. Equipped with a Sabre ES9018K2M DAC, the OPUS #11 delivers excellent sound quality and support for PCM formats up to 32 bit/384 kHz, as well as DSD64 and DSD128. It’s no wonder one Head-Fi reviewer calls it “an easy recommendation” and “the best DAC/amp combo I’ve come across for less than $649.”

Note: Please note that the OPUS #11 has no volume control. Instead, volume is controlled on the source you're plugged into. 

Audio-Opus OPUS #11
Audio-Opus OPUS #11
Audio-Opus OPUS #11
Audio-Opus OPUS #11


  • Audio-Opus
  • Body: Brushed aluminum, gold finish
  • CPU: XS1-U8A-64 (XMOS)
  • DAC: Sabre32 ES9018K2M (32-bit DAC)
  • Output impedance: 1.2 ohm
  • Output level: 1.9 Vrms (no load)
  • Signal-to-noise ratio: 113 dB at 1 kHz
  • Crosstalk: 124 dB at 1 kHz
  • THD + N: 0.008% at 1 kHz
  • Frequency response: 20 Hz – 20 kHz (0.03 dB)
  • USB input interface: USB Audio 2.0/1.0, asynchronous
  • Supported audio formats, PCM: Up to 32 bit/384 kHz
  • Supported audio formats: DSD: Native DSD, DSD over PCM (DoP), DSD64 (2.8224 MHz), DSD128 (5.6448 MHz), DXD (24 bit/352.8 kHz)
  • Sample rate: 44.1, 48, 88.2, 96, 176.4, 192, 358.2, 384 kHz
  • Battery capacity: 1,750 mAh / 3.7 V
  • Playing time between charges: 8 hrs
  • I/O: USB 2.0 in (micro 5-pin), DC jack in (5V/1.2A), earphone out (3.5 mm)
  • LED indicators: One for charge, one for battery level/USB connection
  • Supported O/S: Windows XP/Vista/7/8.1, Mac OS x 10.6.4 or later, Android (4.4 and above), iOS 7/8/9
  • Driver required for Windows 10 users
  • Dimensions: 2.2 x 4.1 x 0.3 in (56 x 103 x 7.9 mm)
  • Weight: 2.8 oz (80 g)


  • iOS connection kit: MicroUSB to USB A cable, short MicroUSB to USB A cable
  • Android connection kit: MicroUSB to MicroUSB cable
  • Gel pad
  • Quickstart guide
  • Warranty card


All orders will be shipped by Massdrop.

Estimated ship date is Oct 23, 2017 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.