Asus Phoebus Solo Component Tour
Much like we do in our motherboard reviews, we’ll take the time to look at each individual component, and what it means for the quality of the Xonar Phoebus Solo:
First up is the C-Media CM8888DHT processor. Asus have used a similar chip in the past, but that version could only work on a PCI bus. That’s why Asus’ first Xonar PCI-E cards came with a PLX bridge chip. Unfortunately this added about 250ms of latency. This version should be much faster, which is something we’ll check on the next page of this review.
The Xonar Phoebus Solo also has a C-Media CM9882 codec to handle the outputs with a 106 dB SNR with ~95dB THD+N. We’ll put this to the test on the next page.
The Cirrus Logic CS5381 is the first of a few Cirrus Logic chips on the Phoebus Solo. This is the Analog-to-digital converter, which handles the microphone and Line-In ports while maintaining a 120 dB SNR.
The main analog outputs use the Cirrus Logic CS4361 Digital-to-analog converter, which has a SNR rating of 114 dB.
The headphone output gets its own DAC – the Texas Instruments PCM1796. This is a high end stereo DAC, with a SNR of 123 dB
The headphone port also gets a dedicated headphone amp – a Texas Instruments TPA6120A2. This is a 600 ohm amp, good for 120 dB dynamic range. It can be set to match your headphones imedance, with three different gain settings.
Here you can see the some NE5532 opamps used for the surround channels. Some soundcards offer replaceable opamps, but these are soldered in. Some more basic 2114 voltage converters are used as well.
Finally we have one last opamp to show you – the L4562. This high quality opamp is used for the front speaker output only.