The Sgi Loop - Radial Engineering JX44 V2 Owner's Manual

True to the Music

THE SGI LOOP

Running unbalanced guitar cables over long distances can result in unwanted noise and interference on the audio
signal, while also negatively affecting the tone. This problem is particularly acute on large stages, where it is
common to send instrument signals from the backline (where the wireless receivers and the JX44 are located) to a
pedalboard at the artist's feet and back again.
To address this issue, the JX44 comes equipped with a special SGI Loop that allows you to connect to remote
pedalboards using balanced XLR mic cables, providing the ability to send your guitar signals up to 300 feet away
without additional noise or loss of tone.
The SGI Loop utilizes the Radial SGI-44, which is placed at the remote pedalboard and acts as an interface between
the low-impedance XLR connections from the JX44, and the high-impedance 1/4" connections on your guitar pedals.
The SGI-44 remote
effects interface
The SGI Loop section on the rear panel of the JX44 includes two XLR connections,
one Transmit (TX) to feed the SGI-44 at the remote pedalboard, and one Receive
(RX) to accept the returning signal. Both of these XLRs are equipped with
premium Jensen transformers to ensure the best possible audio quality and to
eliminate hum and buzz from ground loops. The SGI Loop section also features
two switches:
• On This switch activates the SGI Loop and illuminates the LED just
below the switch.
• Lift This ground lift switch isolates pin-1 on the RX XLR input to further
reduce buzz and hum caused by ground loops.
JX44
INPUTS
1-4
SGI TX
SGI RX
EFX SEND
SGI Loop
EFX RECV
AMPLIFIER OUTPUTS
A, B C, D
Amplifiers assigned to L or R using the front
panel switches will include signal from both the
SGI Loop and the Stereo EFX Loop
Radial Engineering Ltd.
Using the SGI-44 with the JX44
to connect remote effect pedals
When the On switch is pressed, the SGI Loop takes a feed of all
active instrument inputs and sends the signal out to the SGI-44
and back again before feeding any active amplifier outputs, even
if they are assigned to the DRY setting.
If you are also using the local Stereo EFX Loop on the JX44,
this feature will directly follow the SGI Loop in the signal path,
as shown in the adjacent block diagram. In this case, the SGI
Loop will insert your remote pedalboard into the signal path
after the instrument input section, and before the local Stereo
Stereo
EFX Loop. This means that any active instruments will feed your
EFX Loop
pedalboard first, which will then in turn feed any stereo EFX you
have connected to the JX44 (the SGI Loop will feed the left and
right sides of the EFX Loop equally).
Any amplifier assigned to L or R will therefore include both the
SGI Loop and the Stereo EFX Loop in the signal path, while amps
assigned to DRY will only include signal from the SGI Loop.
The SGI Loop section
on the JX44 rear panel.
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JX44 V2™ Owner's Manual