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JCAT WAS FOUNDED BY MARCIN OSTAPOWICZ. Recognized high-end audio consultant. One of pioneers of computer audio. Co-creator of the award-winning software, JPLAY. Manufacturer, curator and distributor of high quality audio products. Can operate alone or in chain with our JCAT USB Card. JCAT USB-ISO Cable for best performance is recommended. SPECIFICATION: Featuring world’s first industrial High Speed USB Isolation technology from Intona; Provides galvanic isolation up to 2.5 kV to the USB bus in all speed modes: Low Speed, Full Speed and USB 2.0 High Speed (480 MBit/s).
USB playback redefined3 years after the release of the first revision of the JCAT USB Card, designed to enhance USB Audio playback experience with desktop PCs, we proudly present its successor – the JCAT USB Card FEMTO.Even though the performance of the original JCAT USB Card was excellent and by many customers and professional reviewers considered best on the market, our endless pursuit of quality led us to new developments that set the bar at the level we have never thought would be possible with computer based USB Audio playback. FEMTO Clock TechnologyWe have found that the quality of clock used for generating USB Audio signal at PC side is as important for sound as the quality of clock in DAC.
Therefore for the new revision of the JCAT USB Card we incorporated one of the finest clock oscillators available, Crystek CCHD-957 which has been designed specifically for High Definition Audio. It features a typical low close-in phase noise of -100 dBc/Hz @ 10 Hz offset, and a noise floor of -169 dBc/Hz. With this extreme low phase noise performance, you will “Hear the Difference”. The Crystek Femto Clock which is located just a few millimeters away from the USB controller chip is powered by a dedicated ultra-low noise linear regulator for maximum performance.
Ultra low-noise regulationIn the previous revision of the JCAT USB Card, the USB controller’s digital core 1V power was supplied from the PC via PCI Express lane. We redesigned the card so that all internal circuits are powered by ultra-low noise linear regulators exclusively if any 5V power supply is connected (either external or internal).Although the JCAT USB Card FEMTO will operate without 5V for self-powered USB devices, the best performance can be achieved with an external high quality 5V power supply. You can use the newly released 100W linear power supply from our JCAT shop or other high quality linear or battery 5V PSU.If high quality 5V PSU is not available please connect internal computer power supply to the LP4 connector on the card and switch jumpers J5 & J7 from default position 1-2 to position 2-3. By default the jumpers on the card are configured to use external PSU via DC jack connector on the PCI-e bracket next to the two USB ports on the card. If PSU is not connected then it is impossible to filter well.JCAT USB Card FEMTO can benefit additionally from full galvanic isolation provided by our JCAT USB Isolator.