Part 6 – Other cool uses for your JDI
Use the Radial JDI to re-amplify your signal!
Today, a popular studio effect is to record a signal such as guitar, voice or keyboard on a track and then run the pre-recorded
track back through a guitar amplifier or effect pedal. This effect is known as reamping or re-amplifying and was started by
Les Paul in the 1950’s and was widely used on recordings by the Beatles in the 60’s, and by Steely Dan in the 1970’s.
The Radial JDI can be used ‘backwards’ to convert a low-impedance mic level signal back to a high-impedance guitar signal.
Simply connect the output from the recorder to a mixer and the mixer’s output to the JDI’s XLR output using a female-to-
female XLR turn-around adaptor. Keep your level down to ensure the signal will not overload the JDI’s transformer. Connect
the ‘input’ of the JDI to the input of the guitar amplifier and you are set to go!
Use the Radial JDI for long cable runs
High impedance, coax cables are susceptible to noise if they exceed 25 feet. Balanced lines on the other hand, split the
signal into two low impedance signals and use phase cancellation to reduce noise. Connecting your guitar to one JDI to
send the signal and then using another Radial JDI ‘backwards’ to convert the signal back to high impedance (as depicted
below) is very effective. This is a good trick to use when recording the sound from your amplifier at some distance while
you play in the control room and listen through studio monitors or headphones.
Radial Engineering
JDI User Guide
11
True to the Music
