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CONGRATULATIONS on your purchase of the Radial J•ISO or Pro-ISO passive
signal conversion tools. As with all Radial products the J•ISO and Pro-ISO
are easy to use and ensure the best audio quality. This short manual contains
all the information you need to start using the tools right away. For more
information on the J•ISO, Pro-ISO and other Radial products, visit our web site
at www.radialeng.com. The Radial J•ISO and Pro-ISO are thoughtfully designed
and useful devices that will provide you with years of reliable service. Enjoy!
INTRODUCTION
The Radial J•ISO and Pro-ISO are two channel line-level signal conversion tools
with transformer isolation to prevent noise from ground loops. Both units are
identical except for the audio transformers. The J•ISO features two premium
Jensen audio transformers. The Pro-ISO uses high quality Radial transformers.
Both units convert +4dB balanced signals to -10dB unbalanced with optimum
signal-to-noise and signal transfer quality.
These devices allow you to connect professional balanced audio gear to
consumer unbalanced. In addition to standard RCA stereo outputs, both units
are equipped with ¼" instrument and 3.5mm jacks, allowing virtually any -10dB
audio device to be connected without adapters cables.
For instance, the J•ISO and Pro-ISO are great tools to interface a pro mixing
console or high-end microphone preamp a portable recorder or camera to
capture the house mix.
+4dB Balanced
The J•ISO and Pro-ISO do not require any power to operate. They are extremely
portable and plug-and-play easy to use. The circuit is 100% passive and will
not add any noise to the signal. The rugged construction is compact enough to
take anywhere and dependable for service out on the road.
XLR INPUTS
These inputs are intended for professional audio equipment with a balanced
+4dB line output. The Pro-ISO uses the AES standard XLR pin-out where PIN-2
is hot (+) and PIN-3 cold (-).
AUDIO TRANSFORMERS
A pair of audio transformers converts the low-impedance balanced +4dB
source signal into a high-impedance, unbalanced output. Jensen and Radial
transformers are exceptional for their linear frequency response and ability to
handle high input levels without distortion.
Radial Engineering Ltd.
-10dB Unbalanced
J•ISO / Pro-ISO User Guide
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