Objective2 + ODAC Headphone Amplifier – 6.3mm Headphone connector and RCA out


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The Objective2 is a marvel in performance vs. cost and outperforms many more expensive headphone amplifiers on the market.

This outstanding performance has now been paired with the ObjectiveDAC (ODAC revB), a truly transparent 24bit DAC.

This product is currently out of stock and unavailable.


The Objective2 Headphone Amplifier is the first design of the US blogger and electrical engineer NwAvGuy which is produced under the Common Creative License  Creative Commons License 

This outstanding performance has now been paired with the ObjectiveDAC (ODAC revB), a truly transparent 24bit DAC produced by Yoyodyne Consulting

Technical Specifications:

  • 3.5mm Input and 6.3mm Output Connector
  • RCA output on backside
  • build in ODAC with mini USB connector
  • ALPS Stereo Potentiometer
  • 230V~ 15 VAC 500mA Power supply (EU, UK, AU and US supplies available)
  • back power inlet to avoid cable clutter
  • Gain switch (2.5x and 6.5x gain as standard)
  • Size 108.5 x 84 x 30 mm (without Knobs and screws)

Thanks to the RCA output (muted when headphones are plugged in) you can use it as well to drive some monitor speakers or power amplifier. Even so it is not its original intend, it works very well.

An USB cable (90cm/3ft) with ferrite bead and gold plated contacts is included for free, longer cables are available separately.


Measurements ObjectiveDAC:

(ODAC revB)

Frequency Response, 20-20kHz +/-0.04 dB
THD+N 100 Hz, -0.15dBFS 0.0013%
THD+N 20 Hz -0.15dBFS 0.0015%
THD+N 10 kHz -0.15dBFS 0.0024%
Noise, A-Weighted – 103 dBu
Dynamic Range (A-Weighted) > 112 dB
Dynamic Range (Un-Weighted) > 109 dB
Crosstalk @ 1kHz, -10dBFS (3.5mm) -86.4 dB
Sum of Jitter Components @ 11025 Hz, -1dBFS -112.3 dB
IMD CCIF, -6.03 dBFS, 19/20kHz, 24/96k 0.0005%
IMD SMPTE -2 dBFS, 24/96k 0.0008%
Linearity @ -90dBFS -0.08 dB
Maximum output 2.10 VRMS

Measurements Objective2:

Frequency Response +/- 0.1 dB
Noise (ref 400 mV) -105 dB
THD 1 Khz 150 Ohms 0.0016%
Output Impedance 0.54 Ohms

A full list of the measurements can be found in NwAvGuy‘s blog.

Additional information

Weight N/A
Case Color

All Black, All Silver, Black with Silver front

Volume Knob

Black, Silver

Power Supply



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