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About the S170
The NAD S170 is a surround sound preamplifier and processor designed for home theater use, supporting 7.1 channels. It features a fully digital signal path providing linear response across all volume levels, with a frequency response of 20Hz to 20kHz and a signal-to-noise ratio around 90-98 dB. The unit offers flexible input assignment, including six video inputs with component video input and output, and analog 5.1 inputs for future format decoders. It includes an analog bypass option to remove all processing for high-quality analog sources. The S170 supports upgradeable software via a serial port and is highly configurable. It was produced from 2001 to 2003 as part of NAD's Silver Line series. Reviews note that while it excels in low volume dynamics and flexibility, it may exhibit some upper mid-range harshness at higher volumes compared to NAD's analog S100 preamplifier. The S170 is no longer manufactured.
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