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ASRock 939Dual-SATA2 Review
Performance: AGP vs. PCI-E »Rightmark Audio Analyzer
We used Rightmark Audio Analyzer together with a loop-back cable to analyze the quality of the on-board audio solution.
For easier comparison we summed up the individual scores of all tested boards (1: Very poor, 2: Poor, 3: Average, 4: Good, 5: Very good, 6: Excellent).
The sound quality of the 939Dual-SATA2 on-board audio is very respectable. It's better than all other tested nForce4 motherboards.
Summary
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.18, -1.12 | Average |
| Noise level, dB (A): | -80.8 | Good |
| Dynamic range, dB (A): | 75.2 | Average |
| THD, %: | 0.038 | Good |
| IMD, %: | 0.079 | Good |
| Stereo crosstalk, dB: | -78.6 | Very good |
| IMD at 10 kHz, %: | 0.140 | Average |
General performance: Good
Frequency Response
| Frequency range | Response |
| From 20 Hz to 20 kHz, dB | -7.85, +0.18 |
| From 40 Hz to 15 kHz, dB | -1.12, +0.18 |
Noise Level
| Parameter | Left | Right |
| RMS power, dB: | -74.2 | -74.5 |
| RMS power (A-weighted), dB: | -79.9 | -80.8 |
| Peak level, dB FS: | -54.9 | -55.6 |
| DC offset, %: | 0.44 | 1.80 |
Dynamic Range
| Parameter | Left | Right |
| Dynamic range, dB: | +72.4 | +73.5 |
| Dynamic range (A-weighted), dB: | +75.2 | +77.7 |
| DC offset, %: | 0.43 | 1.79 |
THD + Noise (at -3 dB FS)
| Parameter | Left | Right |
| THD, %: | 0.0407 | 0.0377 |
| THD + Noise, %: | 0.0714 | 0.0731 |
| THD + Noise (A-weighted), %: | 0.0686 | 0.0658 |
Intermodulation distortion
| Parameter | Left | Right |
| IMD + Noise, %: | 0.0805 | 0.0791 |
| IMD + Noise (A-weighted), %: | 0.0644 | 0.0638 |
Stereo crosstalk
| Parameter | L <- R | L -> R |
| Crosstalk at 100 Hz, dB: | -75 | -76 |
| Crosstalk at 1 kHz, dB: | -76 | -78 |
| Crosstalk at 10 kHz, dB: | -74 | -71 |
IMD (swept tones)
| Parameter | Left | Right |
| IMD + Noise at 5 kHz, %: | 0.0771 | 0.0736 |
| IMD + Noise at 10 kHz, %: | 0.1369 | 0.1356 |
| IMD + Noise at 15 kHz, %: | 0.2051 | 0.2094 |
Nov 23rd, 2024 17:48 EST
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