Massdrop O2+ODAC (revB) DAC/Amplifiersearch

Massdrop O2+ODAC (revB) DAC/Amplifier

Massdrop O2+ODAC (revB) DAC/Amplifier

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The Best of Both Worlds

Everything you wanted in the O2 and ODAC is now available in one complete housing. Built with the exact specifications of each standalone unit, the O2+ODAC offers everything audio designer NwAvGuy set out to make in a more compact package. Capable of powering everything from IEMs to HD800s with ease, the O2+ODAC is your all-in-one baseline DAC/AMP combo at an entry-level price. See below for the full list of performance specifications.

Massdrop O2+ODAC (revB) DAC/Amplifier

Note: This drop is limited to 555 units. At checkout, you can select either the 110V or 220V AC Adapter.

The Amplifier

With a highly linear frequency response--+/-0.1 dB from 20Hz-20Khz--the O2 Amplifier section will drive any headphone between 16 and 600 ohms. It's exceptionally low noise floor allows the full range of dynamics to be reproduced well above any audible noise.

Massdrop O2+ODAC (revB) DAC/Amplifier
Massdrop O2+ODAC (revB) DAC/Amplifier


The ODAC achieves reference-quality sound across a variety of levels. With a 24-bit resolution to sustain sound quality, even when the software volume is lowered, and a PCM5012A DAC chip, the ODAC can stand up to four-figure converters in a blind listening test. When used in tandem with the O2 amp, the ODAC pumps out completely transparent audio. To reduce jitter and other noise to negligible amounts, the ODAC is equipped with dual power supply, a natural frequency response of +/- 0.1 dB, and self-generated audio clocking.

Massdrop O2+ODAC (revB) DAC/Amplifier

Input/Output Options

Looking at the back of the device, you'll see a single set of RCA jacks labeled with symbols for both input and output. This is because when you're using the USB input, the RCA jacks act as output from the ODAC. If you disconnect the USB, you can connect analog input from your favorite DAC straight to the O2. 

Massdrop O2+ODAC (revB) DAC/Amplifier

DAC Specs

  • Frequency Response 20Hz-20kHz: +/- 0.04dB
  • THD+N 100 hz -0.15 dBFS: 0.0028%
  • THD+N 20 hz -0.15 dBFS: 0.0015%
  • THD+N 10 Khz -0.15 dBFS: 0.0024%
  • IMD CCIF 19/20 Khz -6.03 dBFS: 0.0015%
  • IMD SMPTE -6.03 dBFS: 0.0015%
  • Noise A-Weighted dBu 24/96: -103 dBu
  • Dynamic Range (A-Weighted): > 112 dB
  • Linearity Error -90 dBFS 24/96: -0.08 dB
  • Crosstalk -10 dBFS 100K 3.5mm: -86.40 dB
  • USB Jitter Components 11025Hz: -112.3dB
  • Maximum Output Line Out 100K: 2.1 VRMS
  • Distortion: < 0.005%
  • Audio Formats: 16/44, 16/48, 16/88.2, 16/96, 24/44, 24/48, 24/96
  • Interface: USB, Audio Class 1
  • Native Driver OS Support: Windows XP & Later, OS X x86, iOS, PS4, Linux

Amplifier Specs

  • Frequency Response: 20Hz-20kHz: +/-0.1 dB
  • THD 1 Khz 150 Ohms: 0.0016%
  • IMD CCIF 15 Ohms: 0.001%
  • IMD SMPTE: 0.002%
  • Noise, A-Weighted: -105 dBu
  • Max Output (33 Ohms): 613 mW
  • Max Output (150 Ohms): 355 mW
  • Max Output (600 Ohms): 88 mW
  • Output Impedance: 0.54 ohms
  • Crosstalk (15 ohms): -65 dB
  • Channel Balance (50% volume):0.6 dB
  • Gain Configuration: 1.0x and 3.3x

Jack Configurations

  • Front ¼ inch input
  • Rear RCA input/output
  • Rear miniUSB
  • Rear power
  • Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm)
  • Weight: 9.28 oz
Massdrop O2+ODAC (revB) DAC/Amplifier


All orders will be shipped by Massdrop.

Estimated ship date is Jan 29, 2016 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.