Radial Engineering JS2 User's Guide

INPUT PANEL

1. -30dB PAD Allows line-level

sources to connect to the JS•2’s
input.

2. Mic input For low impedance
microphone level signals.

3. Direct-1 thru 600 ohm mic­le vel dir ec t outpu t will pass
phantom power to microphone.

4. Bookend design 14 gauge
steel outer shell creates protective
zone around con nectors an d
switches.

5. Full-bottom no-slip pad This
provides electrical isolation and
plenty of "stay-put" friction to
keep the JS•2 in one place.

OUTPUT PANEL

6. Direct-2 thru Duplicate 600

ohm mic-level direct output.

7. Ground lift (Direct-2 thru)
Lif ts the ground pin- 1 on the
direct-2 thru XLR connector.

8. Isolated output 600 ohm mic­level transformer-isolated.

9. Ground lift (Isolated output)
Lif ts the ground pin- 1 on the
isolated output XLR connector.

CONSTRUCTION

10 . Steel I-beam enclosure

el iminate s stress th at coul d
torque the PC board and cause
solder joint failure.

11. Military-grade double-sided
PCB with plated through-holes is
bolted to welded steel standoffs.

12. Jensen transformer offers
outstanding audio performance.

13. Sturdy PC mounted switches
are high-cycle rated for long life.

Radial Engineering

1 52 3 4

96 7 8

10 11 12

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JS•2 User Guide

JS•2 SPECIFICATIONS

Frequency response 10Hz to 40kHz +/- 1dB
Max 20Hz input level +2.0dBu (1% THD)
Phase distortion +2.8° @ 20Hz
Total harmonic distortion 0.001% THD @ 1kHz (0.05% @ 20Hz)
Common-mode rejection 130dB @ 60Hz (95dB @ 3kHz)
Input Balanced 600-Ohm, mic-level, pin-2 hot
Outputs Balanced 600-Ohm, mic-level, pin-2 hot
Input pad -30dB
Power requirement None, completely passive
Size 3.25” x 5” x 1.875”
Weight 1.6 lbs.

RADIAL ENGINEERING 3 YEAR LIMITED WARRANTY

RADIAL ENGINEERING (a division of J.P. Cabletek Electronics Ltd.) warrants this product
to be free from defects in material and workmanship to the original owner and will remedy
any such defects free of charge according to the terms of this warranty.

Radial will repair or replace (at its option) any defective component(s) of this product
(excluding batteries, finish and wear and tear on components under normal use) for a
period of three (3) years from the original date of purchase. In the event that a particular
product is no longer available, Radial reserves the right to replace the product with a similar
product of equal or greater value.

To make a request or claim under this limited warranty, the product must be returned prepaid
in the original shipping container (or equivalent) to Radial or to an authorized Radial repair
center and you must assume the risk of loss or damage. A copy of the original invoice
showing date of purchase and the dealer name must accompany any request for work
to be performed under this limited warranty. This limited warranty shall not apply if the
product has been damaged due to abuse, misuse, misapplication, accident or as a result
of service or modification by any other than an authorized Radial repair center.

THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE
HEREOF AND DESCRIBED ABOVE. NO WARRANTIES, WHETHER EXPRESSED
OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND
BEYOND THE RESPECTIVE WARRANTY PERIOD DESCRIBED ABOVE OF THREE
YEARS. RADIAL SHALL NOT BE RESPONSIBLE OR LIABLE FOR ANY SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE
OF THIS PRODUCT. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND
YOU MAY ALSO HAVE OTHER RIGHTS, WHICH MAY VARY FROM STATE TO STATE
OR PROVINCE TO PROVINCE.

Radial Engineering

JS•2 User Guide

True to the Music

JS•2

2-Way Microphone Splitter

Users Guide

Radial Engineering
1638 Kebet Way, Port Coquitlam BC V3C 5W9
Tel: [phone] Fax: [phone]
email: [e-mail]

Radial Engineering is a division of C•TEC (JP CableTek Electronics Ltd.)
Radial Twin-Iso users guide V1.0 - Part #: R870 1055 00

www.radialeng.com

Subject to change without notice

J-RAK

The optional J-RAK is a high density rackshelf for Radial DI’s and splitters.
It’s a 2RU rack chassis that allows up to 8 Radial devices in one neat 19”
package. The DI’s can be mounted with either the input side or output side
facing the front. Ideal for studio or touring. Constructed of 14 gauge steel with
a baked enamel fi nish.

J-CLAMP

The optional J-CLAMP can mount a single Radial
device to virtually any surface. Perfect for hiding
away inside racks, on podiums or under tables.
Constructed of 14 gauge steel with a baked
enamel fi nish.

JS•2 BLOCK DIAGRAM

DIRECT-1 output connects to
main console. This console
supplies phantom power back
to the mic.

ISOLATED output connects to
second console or recording
device.

2-Way Microphone Splitting

WELCOME

Congratulations on your purchase of the Radial JS•2 mic splitter. This simple
yet extremely handy device will likely fi nd its way into all types of applications
such as splitting mic signals and distributing signals throughout your sound
system. The Radial JS•2 is equipped with the world’s fi nest Jensen bridging
transformer to ensure the audio signal is transferred and distributed without
distortion and is built using the fi nest materials to ensure years of trouble-free
performance.

We have purposely written this manual to be short, as most users will likely be
familiar with the JS•2’s applications. We do suggest that you take a moment
to read through this document to familiarize yourself with the features that are
built in. For more detailed information, please visit the Radial website. This
is also where we post questions and answers that come from users after the
product is released. If you do not fi nd an answer, we invite you to send us an
email at [e-mail] and we will do our best to answer your query in a
prompt and professional manner.

The Radial JS•2 is a wonderful device that will surely provide you with years of
problem-solving connectivity. Enjoy!

INTRODUCTION

Upon inspection, you will notice the Radial JS•2 is equipped with four XLR con­nectors: the MIC INPUT connector; the DIRECT-1 THRU; the ISOLATED OUT­PUT with ground lift switch and the DIRECT-2 THRU with ground lift switch.

Normally, the source microphone connects to the MICROPHONE INPUT and
the DIRECT-1 THRU connects to the mixing console that supplies phantom
power back to the microphone. If the source is a line-level device, such as
a CD player, the input pad should be engaged to ensure the signal does not
saturate the transformer, causing distortion. Note that the JS•2 will always

output a mic-level signal regardless of input level.

The JS•2’s isolated output will then feed a tape recorder, broadcast truck or
other PA system. The advantage of using the transformer-isolated output is
that it creates a magnetic bridge between the source and the destination, thus
eliminating any direct electrical current from passing. This eliminates problems
such as ground loops which can cause buzz and hum in a sound system. A
ground lift switch is provided to disconnect the ground path between the input
and output to further suppress noise.

The DIRECT-2 THRU output is a direct output and is identical to the DIRECT­1 THRU output, except that it is equipped with a separate ground lift switch.
This would be used to send a mic-level signal to an alternate device such as
a recording system.

The beauty of the JS•2 is that it is completely passive. This means that it
does not require any power whatsoever to make it work. The magic lies in
the quality of the transformer we use. Jensen transformers are famous for
their exceptional signal handling and low distortion. The JS•2 is equipped with
a Jensen JT-MBC mic-bridging transformer that features a laminated nickel

core and Faraday shield for optimum signal transfer. You will fi nd the JS•2 to
be transparent and very effi cient, making it the perfect choice in professional
installations.

USING THE JS•2

As with all Radial products, using the JS•2 is simple and straight ahead. Make
sure the sound system is turned off and all levels are set to zero before mak­ing audio connections. This will avoid any pops in the sound system that could
cause damage to speakers.

Connect a microphone or line-level source to the MICROPHONE INPUT on
the JS•2. Connect the DIRECT-1 THRU output to the console that supplies
phantom power and then the ISOLATED OUTPUT to your monitor console
or recording system. If you plan to connect a main and monitor console AND
you want to also connect to a recording system, we recommend that the iso­lated output go to the recorder and the monitor desk connect to the DIRECT-2
THRU output. If you encounter noise, simply depress the ground lift switch.

If you are using the JS•2 with a line-level device such as a keyboard or CD
player, depress the -30dB input pad. This will reduce the current going into
the transformer.

Start by turning up your sound system slowly to test connections before driv­ing at full volume. You are now ready to go!

JS•2 User Guide

Radial Engineering

JS•2 User Guide

Radial Engineering

JS•2 User Guide

Radial Engineering