Canada-based Paradigm has a long, respected pedigree in the high-end audio world, where it has marketed high-end speakers priced from a few hundred dollars to north of $20,000. Over the past few years, however, Paradigm has quietly brought its audiophile expertise to portable audio and music streaming. That latter category is where the Paradigm PW Amp comes in
PW stands for Premium Wireless, a collection of higher-end audio components that use DTS Play-Fi technology for wireless multi-room audio. Play-Fi is a direct competitor to Sonos, but with two key differences: First, Play-Fi can support high-resolution audio files—up to 24-bit resolution with sampling rates as high as 192kHz—where Sonos is limited to 16-bit/48kHz tracks. (But before you get too excited, know that the the PW Amp will only stream high-res tracks over wired ethernet connections; it will automatically downsample high-res tracks you send over a wireless connection.)
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https://www.pcworld.com/article/3153229/speakers/paradigm-pw-amp-review-a-dts-play-fi-amplifier-that-will-bring-out-the-best-from-your-speakers.html