Hi-Fi Choice Network Purifier review
Friday, 11th July 2025
Following two excellent reviews from Audiograde and HiFi Pig, HiFi Choice has given their verdict on our Network Purifier ethernet filter.
True to form, the review starts with an overview of the product, what it does and why. Starting with the ‘why?’, the reviewer asserts that digital audio is no more immune from noise that its analogue sibling, mobile and Wi-Fi networks being two of the worst culprits. The eight MiniZap filters found inside the Network Purifier are designed to target the frequency range (2-4GHz) “where this noise is typically produced”, he notes.
To test the efficacy of the filter, he installs it between his network switch and the Cambridge Audio Azur 851N which provides his streamed music feed. In this case, he starts with his own 16-bit/192kHz WAV file of I Forgot Santa Monica by Binker Golding.
By reducing high-frequency noise, Network Purifier is designed to lower the overall noise floor. This is exactly what was experienced, with the reviewer reporting that“the double bass at the start of the piece appears to emerge from a blacker background with the Purifier installed”.
Similarly, the saxophone became clearer in the mix, and its positioning in the room relative to the other instruments was more pronounced.
Moving on to a 16-bit/44kHz FLAC recording of End Result by the experimental electronic East India Youth, and he find similar results. This time, it’s William Doyle’s vocals which come to the fore, previously more “blended in with the electronic music backing”. Soundstaging and clarity are also improved, “bass is more authoritative and the upper treble more extended without being over the top”.In conclusion, he reports that the Network Purifier does its job admirably, delivering “noticeable audible improvements” with digital music sources.
Magazine: Hi-Fi Choice
Issue: August 2025
Verdict: Five Stars Recommended
Buy Network Purifier
Read the Audiograde review
Read the Hi-Fi Pig review
Written By Simon Dalton
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