SGI-44 ™ Development

The story behind the Radial sets SGI44's development is actually quite simple... it was designed as a means to allow guitarists using the Radial JX44 to connect a distant pedalboard to their signal chain without having to use two Radial SGIs. As the product came to life, a number of new features began to emerge.

Combining two SGIs in one

The Radial SGI is a combination 'send & receive' set that enables you to connect a guitar or bass at the 'transmit end (SGI-TX)' and then reconvert the signal back at the 'receive end (SGI-RX)' to a guitar level at the other. This enables the guitarist to sit in the control room and play a distant amp while listening to the performance via the studio monitors. There is no denying, tuning up that Marshall to 10 sounds like nothing else. Being able to turn up the amp and have it play in an isolated studio lets you move the mics to capture the perfect tone.

The SGI's success in the studio was quickly ported over to live shows on stages where one wants to get the sound of the amp played loud while reducing excessive sound pressure levels on stage. This not only makes it more comfortable on stage, this approach makes it easier for the engineer to mix. The guitar amps are often moved under the stage, put in isolation cabinets or for permanent installations such as theatres or house of worship, the amps are located in a separate room and connected via the SGI.

The Radial SGI-44 basically combines the SGI-TX transmitter and the SGI-RX receiver into one box. In situations where one wants to send and receive the signal from a distant point, this has the advantage of simplifying the setup with a single power supply and single box at each end.

Drag Control load correction

When designing the SGI-44, we laid out several different scenarios that we felt could eventually be needed. For instance, some guitarists hate wireless systems. This is mostly due to the way the majority of buffers are designed. Let's face it: wireless systems are technological wonders designed by scientists! These guys rarely play guitar. So while the given device may spec out well, it may not sound right.

One of the most powerful features in the SGI-44 is Drag Control load correction. Drag Control works on magnetic pickups by allowing the user to adjust the load on the pickup to replicate the 'tone and feel' as if connecting directly to a tube guitar amplifier. When you are connected directly to an amp, the guitar and the amplifier form a circuit. The pickup, being a transformer of sorts will react with the circuit and impedance in the cable. This creates a familiar tone and feel. Once a buffer or some sort of active circuit is placed in between the guitar and the amp; the tone changes. Drag Control is applied before the buffer to recreate the loading effect of the original circuit.

The Radial SGI-44 employ the same high performance buffers that has made the Radial JD7 an industry standard and today, Radial's unique class-A buffers are used by many of the world's top artists including Eric Clapton, Jeff Beck, Carlos Santana, Steve Lukather, John Petrucci, Neil Schon and Steve Vai. Enough said.

Adding more flexibility to the stage

We then thought of 'where' the SGI-44 may reside. On stage, it will surely be positioned on the pedalboard. From there, we thought it would be really cool to have a tuner out that would enable the artist to quickly glance at his tuner to make a quick adjustment. When used with the JX44, we pushed this to the next level by enabling the user to remotely mute the amps while the signal passes through the JX44 to the tuner.

The SGI-44 has further been optimized to work with the JX44 by incorporating Jensen transformers throughout. These provide greater noise rejection which – when combined with multiple amplifiers – can lead to serious problems on stage and hours of trouble-shooting.

Simply put... the Radial SGI-44 is designed to make things easy, trouble-free and sound great!