The short answer is yes, the quality of the streamer can matter even if you’re using a high-quality outboard DAC. Here’s why:
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Jitter: The timing of the digital signals can be affected by the quality of the streamer, causing slight deviations known as jitter. Although a high-quality DAC can often mitigate jitter to some extent, a poor-quality streamer may introduce enough jitter that even an excellent DAC can’t fully compensate.
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Signal Integrity: Poor-quality streamers may not maintain the integrity of the digital signal as it’s transmitted to the DAC. While error-correction protocols can minimize the impact, they’re not perfect. In some cases, a compromised signal may lead to a less accurate analog conversion.
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Compatibility: High-quality streamers often offer better compatibility with various formats and resolutions. If you’re playing high-res audio files, the streamer needs to support these to take full advantage of the DAC’s capabilities.
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Noise: Digital streamers, like all electronic devices, can generate electrical noise. Poorly designed streamers may not isolate this noise well, leading to a contaminated digital signal which can adversely affect sound quality when converted to analog by the DAC.
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Connectivity: A better streamer usually offers more and better connectivity options, including higher-quality digital outputs (e.g., AES/EBU, coaxial, optical, etc.), which can impact the audio quality by maintaining a more stable and higher-integrity signal path to the DAC.
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Ease of Use and Features: While not directly related to audio quality, the user interface and features like streaming service integration, multi-room capabilities, and software updates are generally better in high-quality streamers.
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Clocking: Some high-end streamers have extremely precise clocks to synchronize data transmission more accurately. This can lead to better performance in the digital-to-analog conversion process.
So while a high-quality DAC is critical for getting the best sound, a poor-quality streamer can be a bottleneck in your system, limiting the performance of even an excellent DAC.