True to the Music
Radial Engineering Ltd.
J-Rak™ Rackmount Adapter
Congratulations and thank you
for purchasing the Radial J•Rak 4.
The J•Rak 4 is a 19” rack adapter that has been designed to work
with products like the Radial JDI, Radial J48 and the many other
Radial products that employ the same bookend designed enclosure.
Although the J•Rak 4 is a straightforward device, we invite you to take
a few moments to read through this manual and familiarize yourself
with this versatile product. Should you have any questions or com-
ments, please feel free to contact us by sending an email to info@
radialeng.com or browse our web site at www.radialeng.com for the
latest updates and applications.
Enjoy!
PRODUCT DESCRIPTION
The Radial J•Rak 4 requires one rack space (1.75”) and allows up
to four Radial products to be rack-mounted in a standard 19” rack.
The J•Rak 4 is designed to allow touring companies to make better
use of their DI box inventory by allowing stand-alone units to be
converted to rackmounted DIs for applications like keyboards. A wide
range of Radial interface and mic-splitter products are compatible
with the J•Rak 4 making it possible to quickly create a custom rack.
A strong advantage for the J•Rak 4 is that you get to choose what
connectors face front. Before you start loading up DIs take a minute
to consider how you will connect to them. Depending on your situa-
tion you may prefer to have the input panel face front. This would be
best for studio applications where instruments are often connected
and disconnected during a session.
GUITARS AND BASS
The 1/4" inputs face front allowing
easy connection for instruments.
J•RAK
If you’re using the J•Rak 4 in a concert touring situation then you
may want the XLR outputs to face front for quick connection to a
microphone snake. The J•Rak lets you choose the orientation for
each slot so you may want to think about which arrangement is best
for your setup.
KEYBOARD RACKS
The 1/4" inputs face toward the rear for
connection to rackmounted modules.
SYNTH 1
SYNTH 2
J•RAK
As with all Radial products, the J•Rak 4 features heavy-duty construc-
tion and a baked enamel nish for years of trouble-free performance.
The J•Rak 4 is supported by the Radial 3-year transferable warranty
to protect against manufacturing defects.
SETTING UP THE J•RAK 4
Step One: Remove the Shell
To begin, remove the protective outer ‘book-end’ shell from the Radial
product by unscrewing the four (4) hex #6/32 screws. A hex allen key
is provided for these screws. Do not discard the screws or shells.
Store them in a safe place in case you want to restore the product to
its original con guration.
Step Two: Load into Slot
With the outer shell removed, slide the enclosure into the rear of the
J•Rak 4 slot.
Step Three: Rear Screws
Once the enclosure is seated in the J•Rak 4 locate the two screw
holes for the slot on the top. Sixteen Philips head screws are provided
to secure enclosures in place. Insert two screws per slot. Repeat the
procedure for the other slots. The J•Rak 4 is now ready to mount in
your 19” rack.
