THE O2+ODAC CUSTOM

Our custom unit arrived in black color and just like the others measures 108.5mm in width, 80mm in depth and 29.5mm in height and weighs 260g (weight may not be exactly the same due to different components).

Since I’m certain many of you wonder about just how large the O2+ODAC is we placed it right next to the compact REVO Wireless headset by Jabra.

The fascia of our custom sample is a little bit different than the two other available models since we chose a 6.35mm headphone jack instead of the typical 3.5mm jack. That aside we see the on/off button, power LED, volume control knob (metal and not plastic), low or high gain amplification button and the input 3.5mm jack.

Moving at the rear we see the microUSB port (used to power the DAC), left and right DAC line RCA output (something you also don't see in all versions) and the DC in.

Gaining access to the interior is not hard and so the first thing you will see (or better yet not see) is the lack of any kind of rechargeable batteries (as expected since the O2 and the ODAC leave very little room).

To stream stereo audio via the microUSB port JDS Labs has used the TE7022L USB 2.0 Controller which supports 16/24-bit resolution and up to 96K Hz sampling rate.

The 2.5/6.5x gain feature of the device is produced with the help of two operational amplifiers (JRC 4556AD Op-Amp model) also present on the PCB.

There are also a total of 6 capacitors on the PCB manufactured by the Japanese Nichicon Corporation.