True to the Music
JDX User Guide
Radial Engineering
2
DESIGN CONCEPT
The JDX differs from a standard DI like the Radial J48. A stan-
dard DI taps the output of the guitar before it is connected to an
amplifi er. The JDX taps the output of your amplifi er yielding a
completely different sound.
The JDX is placed between the amplifi er and loudspeaker. A pro-
prietary reactive circuit follows the constantly changing interaction
between amp and speaker to capture the dynamic response of
your amp. Then an active multi-stage fi lter processes the signal to
emulate the frequency response of a loudspeaker and fi nally, the
JDX uses a Class-A buffering amplifi er to output a signal suitable
for pro-recording and and PA systems.
JDX Amplifi er Direct Box vs. Standard Direct Box
Bass and acoustic guitars often use a standard DI to capture the
clean sound of the instrument. This works because these instru-
ments almost always use an unprocessed sound and the PA
system merely amplifi es the levels of the direct signal.
Electric guitars generally don’t use standard DIs because the am-
plifi er and loudspeaker play an important part in a player’s sound.
Typically a microphone is used to capture the amplifi ed guitar
sound. This raises several other variables such as bleed, place-
ment and acoustics that come along with using microphones.
The Radial JDX offers an easy solution by eliminating the mi-
crophone and delivering the sound of a player’s amp directly
to the recording or PA console. By removing the variables of a
microphone the consistency of the sound from night to night is
improved. This is a boon to in-ear monitor users. When listening
through in-ear monitors subtle differences in mic placement and
room acoustics can translate into huge changes in tone. The JDX
provides great sound while eliminating bleed from other instru-
ments, like drums, from leaking into the guitar mix.
JDX Amplifi er DI J48 Standard DI
Mixing Console
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