SGI Features
The Radial SGI is made up of two modules: The SGI
TX transmitter and the SGI RX receiver. These are
connected using standard balanced twisted pair cable,
thus enabling the SGI to be used in any studio or
stage environment. Both are made from 14 gauge steel
using Radial’s unique I-Beam construction
and protective book-end design. This ensures the
Radial SGI will continue working for years even
when tossed around in adverse conditions. A full-bottom
rubberized pad has plenty of ‘stay’
while providing both mechanical and electrical isolation
while providing a protective barrier that will not
scratch your Pro-Control.
The SGI-TX Transmitter Module:
When using the SGI, the guitar connects to the
SGI TX transmitter. This is a 100% discreet class-A
active driver that employs the same front end
and circuit topology found inside the popular
Radial JD7 Injector. Class-A circuits are the
preferred choice o audiophiles as they retain
the natural characteristics of the instrument
by eliminating zero-cross distortion which in
turn reduces harmonic distortion, inter-modulation
distortion and phase shift. To counter any effect
of the circuitry, the SGI is equipped with Drag
Control, our innovative load correction circuit
that reintroduces the natural relationship between
the guitar and amplifier that would otherwise
be lost. Power is supplied by a 15VDC external
supply for added headroom over 9V systems. Both
transmit and receive modules are equipped with
isolation transformers to eliminate buzz and hum
caused by ground loops.
The Radial SGI-RX Receiver Module:
When in use, the amplifier is connected at the
receive end using the SGI RX. This module is completely
passive thereby not requiring local power. The
transformer receives the signal and is wired ‘in
reverse’ to counteract any ringing that
may be induced at the input side. Smart. This
also eliminates ground loops, a common problem
when connecting equipment using different electrical
circuits.
Using the SGI
The SGI is truly plug & play easy to use.
The unity gain circuit simply relays the input
level to the output for a natural tone.
To use the SGI, start by making sure the guitar
amplifier is off. Connect the SGI TX and RX modules
together using a standard XLR cable. Connect the
DC supply to the SGI and the LED on the front
panel will illuminate to show power is present.
Connect the guitar and amplifier, turn the amp
on and play.
For best results, we suggest that you start with
a clean tone and set the Drag Control to 50% or
12 o’clock and then adjust to suit. More
drag will result in a darker tone, while less
drag will reduce the load on the pick-up and add
sparkle.
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