Using The Headphone Output; Block Diagram; Specifications - Radial Engineering USB-Pro User Manual

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uSIng THE HEAdPHonE ouTPuT

The USB-Pro is also equipped with a stereo
headphone output. This headphone amplifi er
is controlled by the master output level control,
and is designed to be used to check signal
before plugging into a PA system. Adjusting the
level control on the USB Pro will affect both the
XLR and the headphone output. The 3.5mm
(1/8") output is designed for both ear buds and
standard TRS stereo headphones where tip-left,
ring-right and the sleeve is ground.
Be Careful, the USB-Pro is designed for professional use as the
headphone amp is very powerful and is capable of high sound levels
when driven to maximum. Always ensure the output level of your
computer, laptop or tablet is set at an appropriate level before auditioning
music through headphones. This will not only save your ears, but save
the ears of your client! See caution note on the back page.

BloCK dIAgrAm

OUTPUT
LEVEL
LEFT
OUT
USB
RECEIVER
RIGHT
OUT

SPECIFICATIonS*

Audio circuit type: .................................................DAC with balanced outputs
Compatible with: ........................................... Windows XP/7/8 and Mac OS X
Supports: ............................ WDM, MME, ASIO, CoreAudio and DirectSound
Sampling rates: .......................Set by computer OS 44.1/48/96kHz; 16/24bits
Frequency response: ................................................................ 20Hz ~ 20kHz
Total harmonic distortion: .....................................................................<0.01%
Dynamic range: .......................................................................................90dB
XLR output impedance: ................................................................... 250 Ohms
Stereo channel separation:.......................................................................75dB
XLR confi guration: ......................................... Pin 1 ground, Pin 2 (+), Pin 3 (-)
USB bus power:.................................................................... 525mA maximum
USB connector: .................................................................. Type-B USB input
Construction: ......................................14 gauge steel chassis and outer shell
Finish: ...................................................................................... Powder coating
Warranty: ...............................................................Radial 3-year, transferable
*Specifi cations are subject to change without notice.
Radial Engineering Ltd.
TRANSFORMER FULL BYPASS SWITCHES
FILTER
MONO
FILTER
AMPLIFIER
5
True to the Music
GROUND
OUTPUT
H/P
HEADPHONE
DIGIT
RIGHT LEFT
LEFT
GROUND LIFT
CHASSIS
GROUND
OUTPUT
RIGHT
OUTPUT
USB-Pro™