The mains man

日期:2019-02-27 07:16:12 作者:卓於围 阅读:

By Barry Fox Hi-fi buffs often claim to improve sound quality with bizarre electronic “tweaks”—but the results are often highly subjective and hard to prove. Jean-Claude Froidevaux is filing patents around Europe (EP 859 483) on a device which he claims improves fidelity by applying a signal to the mains supply powering the hi-fi. Half the mains feeds the hi-fi, and the rest is used to generate a frequency twice that of the mains. This signal is used to induce a matching frequency in the supply. This, claims the inventor,