(April 28, 2021) AudioQuest's original JitterBug USB Noise Filter can be used in series or parallel to reduce contamination from RF generated by a computer, car, or other devices. Now, JitterBug has gotten a boost thanks to a new metal case and an RF-defeating rubber output cover.
JitterBug FMJ ($59.95) inserts into any USB-A port – be it on a computer, NAS, streamer, or car audio system – in front of a DAC/AMP or other connection. And for additional sonic improvement, it can pull RF noise off a USB power bus when inserted in another unoccupied USB port. In fact, AudioQuest claims that JitterBug FMJ provides a substantial improvement even when plugged into service-only or update-only USB ports on many devices.
Owners of DragonFly Cobalt are encouraged to experiment when placing a JitterBug in front of the device, as Cobalt employs some of the JitterBug's filtering, which may hurt performance.
JitterBug uses USB-A connections on both ends. When used with a computer or other device (or car) with only USB-C connections, AudioQuest offers a super-compact high-performance C-male to A-female adaptor for $21.95, and also the DragonTail flexible C-to-A adaptor (included with DragonFly Cobalt) for $29.95.
JitterBug FMJ is expected to begin shipping on May 15, 2021.