AudioQuest JitterBug User manual

AudioQuest JitterBug USB Filter
JitterBug is designed to remove unwanted noise currents and parasitic resonances
from both the data (communication) and Vbus (power) lines of USB ports. JitterBug
meets all USB 2.0 speed specications. JitterBug’s excellent performance is the result
of careful design and craftsmanship, comprehensive technical measurements, and
thorough listening tests.
JitterBug is extremely easy to use and will oer reliable results for many years to come.
It can be used with external USB digital-to-analog converters (DACs), mobile phones
and portable media devices, and network streaming/storage devices. AudioQuest
oers the following recommendations:
EN
Instructions in English are available at the link below.
ES
Las instrucciones de instalación en el español se encuentran disponibles en el enlace que
se indica a continuación.
FR
Les instructions d’installation en français sont disponibles au lien suivant.
DE
Eine Anleitung in englischer Sprache ist unter dem unten stehenden Link verfügbar.
NL
Instructies in het Nederlands zijn beschikbaar via onderstaande link.
ZH
安裝說明請詳見下列網址連結.
JA
日本語 のインストールガイドは下記リンク先でご覧いただけます。
KO
한국어로 작성된 설치 지침은 아래 링크에서 볼 수 있습니다.
RU
Инструкции по установке на русском языке можно найти по ссылке ниже.
IT
Le istruzioni per l’installazione in italiano sono disponibili nel link indicato in basso.
PT
Pode encontrar as instruções de instalação em português através do link em baixo.
PL
Instrukcja w języku polskim są dostępne w linku poniżej.
TH
คำ�แนะนำ�ในก�รติดตั้งไทยมีจัดไว้ให้ผ่�นลิงค์ต่อไปนี้ี่
www.audioquest.com/jitterbug/manual

For Use with External USB DACs
1. Shut down all audio applications (such as iTunes, JRiver, Qobuz, Tidal, Spotify,
Windows Media Player, or any other application you currently use to play music).
2. Insert JitterBug into any one of your computer’s available
USBports.Next,useaUSBcabletoconnectJitterBugtoyour
DAC. Open your computer’s Preferences/Congurations
to make sure that communication between the DAC and
computer is exactly as you left it.
3. Many computers include more than one USB port. A second JitterBug lter can be
used in parallel, but not in series with the rst lter. Plugging a second JitterBug
lter into an additional port will oer an incremental improvement to your system’s
overall sonic performance.That said, we do not recommend more than two JitterBug
lters per computer.*
(Footnote: In certain instances, your computer may have more than
one dedicated USB bus. For instance, an express card such as the Sonnet
USB 3.0 ExpressCard/34 adaptor (http://www.sonnettech.com/product/
usb3expresscard34.html) adds a second bus to your computer. In such
situations, where there are additional [and independent] USB bus
systems, each bus can support and will benet from up to two JitterBug
lters. If you do not know how many USB buses exist on your computer,
we recommend thatyou err on the side of caution: Presume that your
computer has only one bus.)
For Use with External USB Peripherals
¡When listening to music, USB DAC users should avoid connecting additional USB
devices (such as printers, cameras, and hard drives) to the computer. The reason
for this is simple: Each additional device requires valuable resources, and, as
greater demands are placed on the bus, the computer’s overall sonic performance
is diminished. However, we realize that limiting your computer’s peripherals to a
single external USB device may be impractical. You may, for instance, have to use
an external USB hard drive for media storage. In such cases, we recommend using a
JitterBug in series with the additional USB device, remembering that no more than
two JitterBug lters should be used on any given bus.
¡If you have multiple USB peripherals (such
as printers, cameras, and hard drives) that
must always be connected to the computer,
we recommend that you install these
devices into an external powered USB hub.
The USB cable leading from the hub to
the computer should be connected to the
second JitterBug. This will ensure that noise
from all devices is signicantly reduced.
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USB Hub
USB DAC
HDD

¡The USB 3.0 standard includes SuperSpeed transfer mode, which permits data rates
of up to 5Gbit/s—more than 10 times the speed of the previous USB 2.0 standard—
oering an obvious advantage for those who are transferring large amounts of data.
However, in terms of audio performance, there is no practical application for USB 3.0.
In fact, hard drives and other devices running at the USB 3.0 specication are terribly
noisy and only further pollute the bus.
When used with USB 3.0 devices, JitterBug purposely decelerates the device to USB
2.0 specications. JitterBug’s dual-function line-conditioning circuitry works on both
the data (communication) and vbus (power) lines of USB ports: The latter reduces
noise and prevents EMI and RFI from contaminating the associated digital-to-analog
converter (DAC) and/or cable. The former minimizes parasitic resonances created
by the computer and USB bus, and is optimized to remove noise above the USB 2.0
frequency specication, making it ideal for audio playback.
When transferring large amounts of data, we suggest that you remove JitterBug
from your device. Simply reinstall JitterBug prior to your next listening session.
For Use with Mobile Phones and Media Devices
1. Many receivers, DACs, and automobiles include USB input ports that are compatible
with iOS and Android-based devices. When mobile devices are connected to these
inputs, users can play music from streaming services or from the mobile device’s
internal memory.
While this is extremely convenient, mobile phones and other portable media
devices have the potential to create very noisy electrical environments. To improve
the playback performance of your mobile phone or portable media device, rst plug
a JitterBug into the associated USB input port.
2. A USB memory stick can also function as a
portable media device. If you play les from
a USB memory stick, we recommend that you
plug a JitterBug in between the memory stick
and the associated USB input port.
¡JitterBug draws no power from the source. It
will not inhibit the mobile device’s ability to
charge its battery.

For Use with Network Streaming
and Storage Devices
Network streaming devices primarily send and receive media les over an IP network.
However, many of these devices include USB input ports. Here are some suggestions for
improving the overall audio performance of a system that relies on network equipment:
1. Besides an Ethernet connection, many of today’s streamers include one or more USB
input ports. These ports can oer compatibility with mobile devices (such as iOS or
Android), or they may be designed to work with mass storage devices (such as hard
drives or memory sticks). In either circumstance, plugging a JitterBug into these ports
can improve the overall sound of your streamer—even when nothing is connected
to the port. Therefore, irrespective of the port being in use, the JitterBug lter(s)
may signicantly improve your system’s overall performance—even when music is
being played through a completely separate digital input. Typically, streamers will
oer two USB ports—one on the front and one on the back. In these cases, you
should feel free to use JitterBugs on both ports. However, we’ve encountered rare
instances in which a streamer provides as many as six USB ports. In these rare cases,
we again recommend using no more than two JitterBugs per USB bus system. If you
are unsure of how many USB buses exist on your streamer, err on the side of caution:
Presume that it has only one bus and that two JitterBugs will suce.
2. Networked Attached Storage (NAS) devices are very popular and attractive solutions
for storing large media libraries. Many NAS devices include USB ports for connecting
external devices, such as additional hard drives. Plugging JitterBug(s) into the USB
port(s) on the NAS—again, irrespective of the port(s) being in use or not—may
improve the overall sonic performance of your system.
3. Routers, such as an Apple Airport Express, may include a USB port. These ports
are often intended for connecting USB printers or other such devices. Plugging a
JitterBug into this port, regardless of whether the port has a device connected to it,
can improve the sound of your network audio system.
eSATA
Network Attached Storage
Portable USB HDD

Partner JitterBug with DragonFly
Slightly larger than JitterBug, DragonFly is a digital-audio converter and headphone
amplier with an onboard 64-step analog volume control. It has a USB plug at one end
and a 3.5mm minijack at the opposite end. It connects to any Mac or Windows PC and
bypasses the computer’s compromised audio circuitry to deliver cleaner, clearer, more
naturally detailed sound to headphones, powered desktop speakers, or complete audio
systems. Insert JitterBug in series with DragonFly to further reduce noise and resonances.
Further Preventive Medicine
In addition to JitterBug, AudioQuest oers RCA and XLR Noise-Stopper Caps Noise-
Stopper Caps prevent radio-frequency interference—the archenemy of dynamics and
clarity—from entering your system through unused inputs. Noise-Stopper Caps work
just as well for analog connections (RCA and XLR) as they do for digital (S/PDIF and AES/
EBU) connections. To reduce the amount of RF interference that enters your system,
we recommend“capping”all unused RCA and XLR (analog and digital) inputs. You’ll be
rewarded with a blacker background, deeper soundstage, and a richer, more satisfying
overall listening experience.
For more information, visit:
www.audioquest.com/audio-enhancements/rca-noise-stopper-caps &
www.audioquest.com/audio-enhancements/xlr-noise-stopper-caps.
RCA Noise Stopper Caps XLR Noise Stopper Caps
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DragonFly®
Beautiful Sound from Any Computer, Anywhere
The size and shape of a USB thumb-drive, DragonFly is a digital-audio converter and
headphone amplier with a USB plug at one end and a 3.5mm minijack at the other.
It connects to any Mac® or Windows® PC and bypasses the computer’s compromised
audio circuitry to deliver beautiful sound to earbuds and headphones, desktop
speakers, or to a full-blown home entertainment system.
Simply insert DragonFly into your computer’s USB port, then plug your favorite
headphones into DragonFly’s minijack, or use one of our versatile Bridges & Falls analog
interconnects to connect DragonFly to powered desktop speakers or an amplier or
receiver. Whether you’re on the go or at home, exploring one (or many) of the exciting
new streaming music services, listening to convenient MP3s or high-resolution (up
to 24-bit/96kHz) downloads, DragonFly reveals all the color, detail, and emotion that
brings life to your favorite music, YouTube videos, movies, and games.
Partner DragonFly with NightHawk for an especially satisfying, emotionally compelling
listening experience.

NightHawk™
Around-the-Ear Semi-Open Headphones
NightHawk, designed by Skylar Gray, is AudioQuest’s full-bore assault on both the state of
the headphone art and on the limits to which quality, innovation, and sustainability can be
achieved at an aordable cost.
Named 2015 CES Innovation Winner (Eco-Design & Sustainable Technologies) and
Honoree (Headphones), NightHawk represents a comprehensive rethinking of
headphone design, featuring several materials and technologies never before applied
to headphones.
¡“Liquid Wood” earcups, made from sustainable materials, with a beautiful clear-coat
nish nearly free from volatile organic compounds
¡50mm biocellulose pistonic drivers with a patented split-gap motor for an
exceptionally smooth frequency response and uncommonly low distortion
¡3D-printed biomimetic sound-diusing grille
¡Patent-pending suspension system minimizes harmful resonances while enabling an
extraordinarily light, comfortable t
¡Low-distortion headphone cable uses materials and technologies derived from
AudioQuest loudspeaker cables
¡High-performance 3.5mm 1/4” adaptor
Every aspect of NightHawk’s design was carefully optimized for high levels of sonic,
ergonomic, and aesthetic performance, while maintaining an unwavering focus on
responsible engineering and manufacturing.
http://nighthawk.audioquest.com

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