Description
Radial JDI Jensen-equipped 1-channel Passive Instrument Direct Box
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 mu-metal 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.
JDI with Electric Bass
The JDI is often selected for high output bass guitars. It is able to handle huge signal levels without distortion or artifact. On stage it sends the pure sound of the bass to the PA with minimal loading. In studio, it is perfect for recording direct.
JDI with Acoustic Guitar
Most acoustic guitars have built-in preamps that can be peaky. The JDI
naturally smoothes out the transients for a warmer tone. And because the JDI is
able to handle huge transients, it will not distort. This makes the JDI a great
direct box for acoustic guitars.
JDI with Keyboards
Today's digital keyboards are not only very dynamic, some like digital pianos have a
tremendously wide frequency response. The Radial JDI is able to withstand
excessive signal levels at all frequencies without introducing distortion or phase
shift.
- Jensen Transformer equipped passive DI
- Eliminates hum and buzz from ground loops
- Virtually zero phase & harmonic distortion
- Exceptional signal handling and noise rejection
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 mu-metal 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.
JDI with Electric Bass
The JDI is often selected for high output bass guitars. It is able to handle huge signal levels without distortion or artifact. On stage it sends the pure sound of the bass to the PA with minimal loading. In studio, it is perfect for recording direct.
JDI with Acoustic Guitar
Most acoustic guitars have built-in preamps that can be peaky. The JDI
naturally smoothes out the transients for a warmer tone. And because the JDI is
able to handle huge transients, it will not distort. This makes the JDI a great
direct box for acoustic guitars.
JDI with Keyboards
Today's digital keyboards are not only very dynamic, some like digital pianos have a
tremendously wide frequency response. The Radial JDI is able to withstand
excessive signal levels at all frequencies without introducing distortion or phase
shift.
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