Asus Xonar DX
9. Comparison tests 24bit
After the 16bit tests, we proceed at 24bit using the same methodology. We expect to see important differences here, since the 24bit are more demanding:
| Testing 24bit/44.1KHz | Asus Xonar D2 | Asus Xonar DX | SoundMAX HD Audio |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.05, -0.04 | +0.03, -0.03 | +0.26, -0.07 |
| Noise level, dB (A): | -108.3 | -110.2 | -89.2 |
| Dynamic range, dB (A): | 108.3 | 110.2 | 88.8 |
| THD, %: | 0.0004 | 0.0009 | 0.0096 |
| IMD + Noise, %: | 0.0014 | 0.0013 | 0.047 |
| Stereo crosstalk, dB: | -110.5 | -105.0 | -87.8 |
| Testing 24bit/48.0KHz | Asus Xonar D2 | Asus Xonar DX | SoundMAX HD Audio |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.06, -0.04 | +0.02, -0.03 | +0.11, -0.03 |
| Noise level, dB (A): | -117.2 | -112.8 | -89.3 |
| Dynamic range, dB (A): | 117.2 | 112.8 | 88.9 |
| THD, %: | 0.0004 | 0.0008 | 0.0092 |
| IMD + Noise, %: | 0.0006 | 0.0011 | 0.0140 |
| Stereo crosstalk, dB: | -116.6 | -105.7 | -88.5 |
| Testing 24bit/96.0KHz | Asus Xonar D2 | Asus Xonar DX | SoundMAX HD Audio |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.08, -0.05 | +0.03, -0.04 | +0.02, -0.06 |
| Noise level, dB (A): | -117.2 | -112.5 | -89.5 |
| Dynamic range, dB (A): | 117.1 | 112.6 | 89.1 |
| THD, %: | 0.0007 | 0.0009 | 0.0093 |
| IMD + Noise, %: | 0.0007 | 0.0011 | 0.014 |
| Stereo crosstalk, dB: | -115.3 | -106.1 | -85.9 |
| Testing 24bit/192.0KHz | Asus Xonar D2 | Asus Xonar DX | SoundMAX HD Audio |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.08, -0.05 | +0.04, -0.05 | +0.04, -0.17 |
| Noise level, dB (A): | -116.3 | -112.8 | -89.4 |
| Dynamic range, dB (A): | 116.3 | 112.8 | 89.1 |
| THD, %: | 0.0013 | 0.0010 | 0.0091 |
| IMD + Noise, %: | 0.0012 | 0.0012 | 0.014 |
| Stereo crosstalk, dB: | -112.5 | -104.8 | -85.3 |
Both Asus soundcards performed much better than an onboard sound card from SounMAX HD that is installed in many boards available on the market. The Asus Xonar D2 again has less noise and higher output levels.
All test results can be downloaded here (218KB).
