He sold everything (except a few good cables) and downgraded to pretty much bare minimal.Back to the very first question… What is “KopiOkaya” then… In Singapore, where Kopi is based in, kopi O simply refers to thick black coffee and kaya is a type of toast spread made of brown sugar, coconut milk, eggs and pandan leaves, commonly served as breakfast in Southeast Asia regions. An euraka moment, it was the sound he had been looking for all these years despite spending thousands and thousands of dollars on branded, highly-reviewed equipment. Throughout the years, Kopi owned many “nice” equipment and accessories… until the year 2009 when he discovered Chi-Fi or Chinese Hifi.
Previously taught in a public school, now a full-time tutor and an “ad-hoc” multimedia producer, Kopi wants to divert his attention from his teaching job and focus on something he truly loves – hifi audio. He fell in love with the sound instantly, and the rest is history. This “nobody” has his audio roots stretch until the mid-1970s when his father hauled back a set of Sansui-Luxman-Coral combo from “a friend’s place” (so that mom believed it was a given set). “Who is KopiOkaya?” that is the first question many audiophiles and earphone enthusiasts ask when stumbled upon his coffee cup avatar… “I am just a nobody…” – that is his usual answer. We shall focus mainly on their SONIC PERFORMANCE. Superior technical performance does not equate to musicality.īoth devices do what they advertised… That is to clean up noise and improve sound. To me, without actual listening, measurements, diagrams, and graphs tell us nothing about sound. There are a few technical forums that have tested these devices with precision audio analysers proving they do nothing, thus labeling them “snake oil”… We are not going to debate that either. Many folks approach this type of accessory with utmost skepticism. Thus, my verdicts are not affected or influenced by their manufacturers in any way. Of course, there are other solutions, such as USB galvanic isolators (either electrical or optical) and analog devices such as ADUM-chip based isolators but we are not going there… we shall focus on both iSilencer+ and JitterBug FMJ in this discussion.ĭISCLAIMER: I bought both devices AT FULL RETAIL PRICE with my own money. Both are marketed as simple, plug-and-play solutions to clean up USB noise (but they probably do not reduce jitter as they are passive devices without clocks – which will be explained in a forthcoming article). IFi Audio iSilencer+ and AudioQuest JitterBug FMJ (Full Metal Jacket) are two very popular USB filters, a.k.a.
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