* Jensen Transformer equipped passive DI
hum and buzz from ground loops
* Virtually zero phase & harmonic
* Exceptional signal handling and noise
The Radial JDI is a passive direct box designed to handle extreme signal
levels without distortion of any kind. Unlike an active DI that is limited by
the buffering amplifier’s rail voltage, the JDI employs a Jensen audio
transformer as the engine. Jensen transformers are legendary in their ability to
gracefully handle transients while delivering a smooth, warm sounding Bessel
curve, reminiscent of the finest vintage gear. Ruler flat from 10Hz to 40kHz and
with virtually zero phase deviation, the JDI delivers the natural, pure sound of
the instrument without artifact.
The 100% passive circuitry inside the JDI is incredibly efficient. The
transformer performs both high-to-low impedance conversion and signal balancing
at the same time with minimal loading and does so without any power whatsoever.
The transformer also introduces a magnetic bridge that passes signal while
rejecting stray DC voltage. This makes the JDI particularly adept at eliminating
hum and buzz caused by ground loops.
Features include input and throughput ¼” connectors, -15dB input pad,
ground lift, and 180º degree polarity reverse to help phase align the instrument
with the PA. A secondary circuit is added for direct interfacing with high
output devices such as guitar or bass amp loudspeakers plus a unique merge
function allows stereo sources such as keyboards to be summed mono, saving
valuable input channels.
Built tough to handle the abuse of live touring, the JDI features a
14-gauge steel I-beam inner frame and a unique book-end outer shell. The
innovative design eliminates stress on the PCB, reducing opportunity for solder
joints to go ‘cold’ while the outer shell creates a protective zone around the
switches and connectors. The steel casing resists noise-causing electromagnetic
pollution and the transformer’s sensitive inner workings are further protected
from magnetic fields with a MuMETAL® can. This ensures the signal transfer is
quiet and free from hum.
These combined features have made the Radial JDI the most popular passive
direct box in professional touring and an excellent choice for instrument
interface in the studio!
The Radial JDI… the world's finest passive direct box.