- PASSIVE DI
The Radial JDI is a warm sounding passive direct box that can transfer extreme signal levels without distortion while eliminating hum and buzz caused by ground loops.PRODI
The Radial ProDI is a high performance passive direct box that is ideally suited for bass and acoustic guitar to deliver a warm, distortion-free sound.Trim-Two
The Radial Trim-Two is a passive direct box, designed for use with laptop computers and other consumer type devices where the user has a requirement for a 'ready access' volume control for quick adjustments on stage.JDI Stereo
The Radial JDI Stereo is a passive stereo direct box designed to handle extreme signal levels without distortion of any kind.PROD2
The Radial ProD2 is a high performance stereo direct box designed to easily interface keyboards to the PA and recording system without noise.StageBug SB-2
The Radial SB-2 is a passive direct box designed for keyboards and active bass. Features stereo to mono mix function to save mixer channels.JDI Duplex
The Radial JDI Duplex is a stereo passive direct box that fully capable of handling any audio signal without distortion, artefact or noise.ProAV1 & PROAV2
The Radial ProAV is a passive direct box with stereo-to-mono merge function designed specifically for the audio-video integrator to reduce channel requirements.StageBug SB-5
The Radial StageBug SB-5 is a compact stereo direct box designed to accommodate laptop computers, tablets and other consumer audio products when amplifying the signal through a PA system.JD6
The Radial JD6 is a 6-channel rackmount direct box designed for keyboards in studio and live touring where optimal signal transfer is required without noise.ProD8
The Radial ProD8 is a high density 8-channel rackmount direct box optimized for professional keyboard rigs where optimizing signal transfer without noise is needed.StageBug SB5W
The Radial SB5-W is a passive stereo direct box designed to fit inside a standard electrical wall box and utilizing a Decora wall plate cover.
- ACTIVE DI
The Radial Firefly is a class-A direct box that combines a 12AX7 tube drive with transformer isolation to deliver spectacular warmth and character.J48
The Radial J48 is a 48 volt powered active direct box that delivers studio quality performance while eliminating hum and buzz caused by ground loops.JDX 48
The Radial JDX 48 is a guitar amp DI that captures the sound of the amplifier and speaker to deliver the tone of a 4x12 half-stack without the need of a microphone.USB-Pro
The Radial USB-Pro is a high-resolution DI box that converts sound files from a laptop and seamlessly transfers them to a pair of balanced audio outs.JDV MK5
The Radial JDV is a class-A direct box with a unique zero negative-feedback circuit that delivers unmatched signal purity for the most demanding recordings.J48 STEREO
The Radial J48 Stereo is a high performance active direct box with extra headroom and advanced grounding for professional touring and studio recording.PZ-DI
The Radial PZ-DI is a unique direct box that is specifically designed for acoustic and orchestral instruments.JPC
The Radial JPC is an active stereo DI with transformer isolated inputs to eliminate noise that is common with computers and consumer audio devices.Headload
The Headload is a combination load box and attenuator that is capable of handling up to 130 watts RMS of continuous power and peaks of 180 watts.PRO48
The Radial Pro48 is a high performance active direct box that is ideally suited for bass and acoustic guitars to deliver clarity without distortion or artifact.StageDirect
The Radial StageDirect is a state-of-the-art active direct box designed for musicians who require extra control when they are on stage.J33
The Radial J33 is a combination stereo phono preamp and direct box designed to interface turntables to professional audio systems.Headload Prodigy
The Headload Prodigy is a combination load box and DI that lets you perform or record at low volume with maximum tone.StageBug SB-1
The Radial SB-1 is an ultra-compact active direct box designed for acoustic guitar and bass that fits inside a guitar case!StageBug SB-4
The Radial StageBug SB-4 is a compact active direct box that has been optimized for use with piezo transducers.BT-Pro
BT-Pro™ is a Bluetooth® DI designed to capture the wireless transmission from a Bluetooth® device and convert the signal to a balanced line for use in a PA.JDX Direct-Drive
The Radial JDX Direct-Drive™ is a unique and powerful device that simulates the sound of a guitar amplifier.4-Play
The Radial 4-Play™ is a multi-channel direct box that has been specifically developed for multi-instrumentalists to enable them to quickly change instruments on stage.
The Radial X-Amp is a dual output class-A active Reamper that lets you take a pre-recorded track and send it through amps and pedals without noise.Reamp JCR
The Radial Reamp JCR is a high-performance passive Reamper that lets you take a pre-recorded track and send it through a guitar amp or pedal chain without noise.ProRMP
The Radial ProRMP is a passive Reamper that lets you take a pre-recorded track and send it through a guitar amp or pedal chain without noise.X-Amp 500 Series
The Radial X-Amp is a 500 series class-A active Reamper with isolated outputs that lets you send a pre-recorded track to two amps and re-record the new sound.Reamp KIT
The Reamp Kit combines a Radial J48 direct box for recording with a Radial X-Amp for Reamping amps & pedals to enhance the tone of your recorded tracks.SGI
The Radial SGI Studio Guitar Interface class-A line driver with load correction lets you send a guitar signal beyond 100 meters via balanced cable without noise.JD7
The Radial JD7 Injector is a class-A guitar distro/splitter with built-in Radial DI and Reamp that can drive up to seven amps or pedal chains simultaneously.JX44
The Radial JX44 Air Control is a wireless signal manager for concert stage that lets you remotely control 4 guitar inputs and 6 amp outputs at once.SGI-44
The Radial SGI-44 guitar interface is a balanced signal extender designed to send the signal from a wireless receiver to the pedalboard and back to the stage amp.
JS2 / JS3
The Radial JS2 and JS3 are high performance passive microphone splitters that lets you feed mixing consoles without signal degradation or noise caused by ground loops.PRO-MS2
The Radial ProMS2 is a high performance mic splitter that accepts a balanced microphone signal and sends it to three outputs simultaneously. As a passive device, there is no need for power.OX8
The Radial OX8 is an 8-channel rack mounted microphone splitter that lets you feed two mixing consoles without signal degradation or noise caused by ground loops.LX8
The Radial LX8 is an 8-channel rack mounted line level splitter that lets you feed two audio systems without signal degradation or noise caused by ground loops.JD7
The Radial JD7 Injector is a class-A guitar distro/splitter with built-in Radial DI and Reamp that can drive up to seven amps or pedal chains simultaneously.JX44
The Radial JX44 Air Control is a wireless signal manager for concert stage that lets you remotely control 4 guitar inputs and 6 amp outputs at once.mPress
The Radial mPress is a modular press box that can be expanded as needed to feed a community-sized press gallery or distribute audio for an international event.Exo-Pod
The Radial Exo-Pod is a passive broadcast splitter that can take the balanced line output from a mixing console and distribute the signal to 14 hand-held recorders, video cameras or wireless receivers.Catapult
The Radial Catapult is a 4-channel audio snake that lets you send analog or AES digital audio signals over standard Cat 5 or Cat 6 shielded twisted pair cable.LX-2
The Radial LX-2™ is a passive balanced line level audio splitter that allows you to easily send an audio signal to two different destinations at once without noise.LX-3
The Radial LX-3™ is a high-performance balanced line-level splitter designed to send one audio signal to as many as three destinations at once.
The Radial Twin-Iso is a two channel balanced line-level isolator that eliminates the hum and buzz caused by ground loops that is often encountered in audio systems.J-ISO
The Radial J-ISO & Pro-Iso are full bandwidth stereo interfaces that converts +4dB balanced line level signals to an unbalanced consumer level output.Pro-ISO
The Radial J-ISO & Pro-Iso are full bandwidth stereo interfaces that converts +4dB balanced line level signals to an unbalanced consumer level output.J+4
The Radial J+4 is a -10dB to +4dB stereo preamp that lets you boost a low output unbalanced signal and interface it with a balanced professional audio system.JPC
The Radial JPC is an active stereo direct box with transformer isolated inputs to eliminate noise that is common with computers and consumer audio devices.McBoost
The Radial McBoost™ is a high performance microphone signal booster designed to elevate the output of a typical dynamic microphone for greater transient response.SGI
The Radial SGI Studio Guitar Interface class-A line driver with load correction lets you send a guitar signal beyond 100 meters via balanced cable without noise.SGI-44
The Radial SGI-44 guitar interface is a balanced signal extender designed to send the signal from a wireless receiver to the pedalboard and back to the stage amp.STAGEBUG SB-6
The Radial StageBug SB-6 is a high performance 2-channel passive audio isolator designed to accommodate both balanced and unbalanced signals.STAGEBUG SB-7
The Radial StageBug SB-7 Earmuff Headphone Silencer lets you turn off one side of your headphones to stop the bleed.STAGEBUG SB-15
The Radial Stage Bug SB-15 High Performance Signal Buffer lets you drive guitar pedals without added noise and also powers 15V Tonebone pedals.ICECUBE IC-1
The Radial IceCube IC-1 is a balanced line level isolator designed to quickly eliminate hum and buzz problems in an audio system by simply inserting it into the signal path.DECODER
Decoder is a microphone preamp and Mid/Side stereo matrix that allows the user to easily create M/S recordings without having to re-configure a recording consoleSpace Heater
The Radial Space Heater is a single space 8-channel tube overdrive that can be used as a stereo summing mixer or as multi-channel studio distortion.Twinline
The Radial Twinline is a unique device that enables a guitarist to share effects pedals between two amps when using the amplifiers' built-in (rear-panel) effects loops.MR5
The Radial MR5 is a MIDI signal translator that allows you to use a MIDI controller to drive the JX44, JX42 and other Radial products that use the JR5 footswitch.
Radial studio products simplify the work-flow without affecting the signal quality to ensure creativity is not hampered during production.MC3
The Radial MC3 monitor controller is a 'straight wire' passive switcher that lets you control two sets of monitors, sub woofer and feed two sets of headphones.Gold Digger
The Gold Digger is a 4-channel mic selector that enables the engineer to quickly compare the sound of four different microphones while sharing the same preamp.Cherry Picker
The Radial Cherry Picker is a unique tool that simplifies the process of selecting the best preamp for use with a given microphone.
Guitar / Amplifier
Whether switching guitars on stage or amps in the studio, Radial offers a complete range of switchers from simple ABYs all the way up!JD7
The Radial JD7 Injector is a class-A guitar distro/splitter with built-in Radial DI and Reamp that can drive up to seven amps or pedal chains simultaneously.JX-42
The JX-42 is a compact guitar selector that lets you instantly switch between four guitars and two amps on stage.JX62
The Radial JX62 is a guitar and amp switcher designed for both wired and wireless guitars in a live concert touring environment.jx44
The Radial JX44 Air Control is a wireless signal manager for concert stage that lets you remotely control 4 guitar inputs and 6 amp outputs at once.JR5
The JR5 is a remote footswitch that lets you select guitars, amps or effects when used with the JX44 and JX42.JR2
The JR2 is a dual function remote footswitch that lets you switch or mute outputs, depending on the Radial device that is connected.BIGSHOT ABY
The Radial BigShot ABY is a true-bypass ABY switcher that toggles or combines two guitar amplifiers in phase and without hum & buzz caused by ground loops.BigShot I/O
The Radial Bigshot I/O is a true-bypass instrument selector that lets you switch between two sources and balance the signal level between them.BigShot EFX
The Radial BigShot EFX is a true-bypass effects loop switcher that lets you turn on or off two pedal-chains and take them out of the signal path when not in use.BigShot SW2
The Radial BigShot SW2 is a dual output remote control with choice of latching or impulse settings to control two amplifiers or effects.Twinline
The Radial Twinline is a unique device that enables a guitarist to share effects pedals between two amps when using the amplifiers' built-in (rear-panel) effects loops.
Radial addresses the fast paced world of live touring with a range of switchers for backing tracks, wireless systems and mixers.Relay Xo
Radial Relay Xo is a 1-in, 2-out switcher for balanced audio used with mic or line level sources as talkback and communication router.SW4
The Radial SW4 is a four channel balanced audio switcher designed for wireless systems, mixing consoles and digital guitar processors.SW8
The Radial SW8 is a backing track switcher that automatically switches between two playback systems to prevent disaster during a live performance.HotShot DM-1
The Radial HotShot DM-1 is a combination mic mute and switch that enables the artist to communicate to band members and techs via momentary footswitch.HotShot ABi
The Radial HotShot AB1 is an XLR balanced input selector that can instantly toggle between two input sources to one output via a latching footswitch.HotShot ABo
The Radial HotShot ABo is an XLR balanced output selector that can instantly toggle one input between two output destinations via a latching footswitch.JR2
The JR2 is a dual function remote footswitch that lets you switch or mute outputs, depending on the Radial device that is connected.JR2-DT
The JR2-DT is a desk-top version of the JR2. It features two top-mounted activator switches to control AB and Mute functions.BigShot SW2
The Radial BigShot SW2 is a dual output remote control with choice of latching or impulse settings to control two amplifiers or effects.
The Radial Phazer is an analog phase alignment tool that lets you combine two sources and bring the fundamentals together for a more natural tone.Phazer Bank
The Radial Phazerbank is a 4-channel analogue phase adjustment tool that enables the engineer to effortlessly adjust the phase between two microphones when double mic'ing a single source.PhazeQ
The Radial PhaseQ is 500 series phase alignment tool that lets you combine two microphones and bring them into perfect phase for a more natural tone.EXTC-SA
The Radial EXTC-SA™ is a stand-alone audio interface that lets you incorporate guitar effects into the realm of pro-audio recording.EXTC
The Radial EXTC is a 500 series effects send & receive module that lets you incorporate guitar effects into the realm of pro-audio recording.Tank Driver
The Radial Tank Driver is a wonderfully unique 500 series module that allows you to drive a balanced line level signal through the reverb tank in your Fender Twin amp!Vocoloco
The Voco-Loco is a foot-controlled effects loop that enables the lead vocalist, sax or trumpet player to incorporate guitar effects pedals into the signal path, just like an electric guitarist adds effects for soloing.Trimode
The Trimode tube distortion takes you from slight overdrive to full-on distortion. Think Mesa-Boogie in a pedal and switch instantly from rhythm to lead.Vienna Chorus
The Vienna Chorus is vintage bucket-brigade chorus that delivers old-school analog tone. Dual-mode controls lets you switch from slow to fast choral effects like a Leslie.
- 500 SERIES
Choose between Radial's award-winning racks for ultimate control over your signal path. Compatible with all 500 series modules, Radial racks are equipped with extra features for greater connectivity plus resettble electronic fuses to keep your gear safe!Workhorse
The Radial Workhorse is an 8-slot 500 series power rack with a built-in analog summing mixer, headphone amp and extensive patching capabilities.WR8
The Radial WR-8 is an 8-slot power rack that lets you load up to eight 500 series modules. Can be expanded with the WM8 mixer for full Workhorse capabilities.Powerhouse
The Radial Powerhouse is a 10-slot power rack for 500 series modules designed to provide maximum density for professional studio setups.SIXPACK
The Radial SixPack is a desk-top 6-slot power rack for the popular 500 series, designed to create the ultimate channel strip with 1600 milliamps of available current.Cube
The Radial Cube is a desk-top 3-slot power rack for the popular 500 series, designed to create the ultimate channel strip with 500 milliamps of available current.PowerStrip
The Radial Powerstrip is a 3-slot power rack for the popular 500 series, designed to create the ultimate channel strip with 500 milliamps of available current.
Preamps & EQs
Radial gives you a choice between tube and solid state preamps to suit your most demanding recording needs. Compliment them with choice of induction coil or discrete class-A equalizers to add creative soul, sparkle or fat bottom end.POWERPRE
The Radial PowerPre is a 500 series 100% discrete mic preamp with Accustate input control for low noise and transformer coupled output for added warmth.JDV-PRE
The Radial JDV-Pre is a 500 series class-A instrument preamp with variable load for magnetic, piezo and active sources and high-pass filter to eliminate resonance.PowerTube
The Radial Powertube is 500 series 100% discrete class-A preamp with high voltage 12AX7 tube gain stage and transformer coupled input for vintage character.Premax
The Radial PreMax is a 500 series channel strip tha combines a state-of-the-art preamp with a 3-band EQ for easy signal manipulation in post production and recording.Q3
The Radial Q3 is a 500 series induction coil EQ that brings the character and excitement of old-school vintage EQ to your recordings with over 1700 EQ curves.Phaze-Q
The Radial PhaseQ is 500 series phase alignment tool that lets you combine two microphones and bring them into perfect phase for a more natural tone.Twin-Servo
The Radial Jensen Twin-Servo & 500 series preamplifier is an updated version of what may well be the most spectacular preamp ever made.PreComp
The Radial PreComp is a 500 series channel strip that combines a state-of the-art preamp with a full-function VCA compressor for dynamic control over the signal.Q4
The Radial Q4 is a 500 series state-variable, 100% discrete class-A parametric EQ that brings character and warmth to your recordings with minimal artifact
Effects & Routing
The 500 series is all about creative use of signal processing. Radial opens the door with compressors, signal routers, cross-over filters, effects interfaces, phase alignment tools and amp simulators. Finally… amazing tools that let your imagination run wild!EXTC
The Radial EXTC is a 500 series effects send & receive module that lets you incorporate guitar effects into the realm of pro-audio recording.Shuttle
The Radial Shuttle is a 500 series patch and insert panel that lets you bring balanced and unbalanced signals in and out a 500 series power rack.Komit
The Radial Komit is a 500 series one-knob compressor-limiter designed to get great results instantly and add crunch and distortion for unque effects.X-Amp
The Radial X-Amp is a 500 series class-A active Reamper with isolated outputs that lets you send a pre-recorded track to two amps and re-record the new sound.ChainDrive
The Radial ChainDrive is a 500 series signal distribution amplifier that lets you send balanced or unbalanced signals to four outputs and control them independently.Tank Driver
A unique module that lets you to drive a balanced line level signal through the reverb tank in your Fender Twin! Drive spring reverbs of all types and deliver the long trailing shimmering effect that is only possible with a true spring.JDX-500
The Radial JDX Reactor is 500 series guitar amplifier interface that lets you capture the tone of a guitar amp and cabinet without a microphone.Submix
The Radial SubMix is a 500 series mixer that lets you combine 4 instruments such as keyboards or effects into a single audio channel via front panel controls.Tossover
The Radial Tossover is a 500 series frequency divider that lets you separate and process low and high frequencies separately via fully variable controls and slopes.
- CABLES & SNAKES
"It all started back in 1981, when I was working in a music store in Edmonton, Alberta." recounts Radial president Peter Janis… "The store's service technician also happened to be one of the top bass players in the city. He not only could fix anything, but he was incredibly musical. I remember the day when he ordered a Jensen transformer and when it arrived, it was as if he had uncovered a gold amulet from the lost city of Atlantis! A few days later, he came into the shop with his hand-made direct box and exclaimed that he had finally been able to hear his bass the way the Gods had intended. I heard what he heard and became a fan of transformers from that moment on. Fast forward a dozen years later… Radial Engineering Ltd., was manufacturing custom cables and snakes for various PA companies and we noticed that many were building their own DI boxes using left over aluminum extrusion or steel boxes. These folks understood the benefit of a high performance transformer but could not buy an off-the-shelf solution. The original Radial JDI was born in 1996, updated in 2001 and further refined in subsequent years."
Building a Better Mousetrap
The process is simple: If you intend to build a better mousetrap, you have to start by understanding what makes it work and where things can be improved. Striving for continued improvement is in fact the very foundation for each Radial product we have ever developed.
A direct box has the primary function of interfacing a musical instrument with the PA system by converting the unbalanced high-impedance instrument signal to a low-impedance balanced mic level signal. Proper impedance matching significantly improves the audio performance, while balancing the signal enables long cable runs without adding appreciable noise. Passive direct boxes employ a transformer to electrically isolate the input from the output using electro-magnetic induction to transfer the signal. The term 'passive' refers to the fact that these direct boxes do not require power such as a battery or 48V phantom power to make them work. Because isolation transformers have the unique ability to bridge the signal without a 'hard' electrical junction, DC noise and stray ground currents are eliminated, thus 60-cycle hum caused by ground loops is virtually eradicated.
Although passive direct boxes have been around for years, the liberal use of inexpensive, low quality carbon or silicone steel core transformers has put into question the quality of a passive direct box versus their active counterparts. Problems with low cost transformers show up in the form of excessive loading, limited frequency response, phase shift, noise and distortion of all types. Cheap transformers sound bad. Good transformers are difficult and expensive to produce.
Buliding a better engine
The JDI's engine is a custom ordered transformer that incorporates a series of very specific manufacturing processes: For instance, the inner core that creates the magnetic bridge between the primary and secondary windings is critical to the transformer's performance. The nickel itself is tested for permeability and the laminations are carefully hand-stacked while paying attention to the magnetic properties to ensure the audio signal is transferred without group delay, phase shift or premature saturation. To certify uniformity, the ultra-fine insulated copper wire is coiled onto the bobbin using digitally controlled winding machines set to a very high tolerance. This not only ensures the exact number of turns is maintained, but the winders are programmed to scatter the wire in a proprietary fashion in order to achieve the desired sonic results. An internal copper Faraday electrostatic shield is carefully inserted between the primary and secondary to eliminate capacitive coupling between the coils. The transformer is then housed inside a MuMETAL® can where the magnetic bridge is protected from outside electro-magnetic fields. The transformer is then mounted on a double-sided military spec PC board and affixed inside a rugged 14 gauge enclosure. The steel shell serves an important role: protecting the inner workings from outside magnetic pollution. Few realize that aluminum - which is used by many other manufacturers - does not provide effective shielding. In fact aluminum is often used to build antennas! The relative permeability of aluminum is rated at 1 while steel is 4000, and MuMETAL® 40,000! The steel outer shell and internal MuMETAL® combine to give you maximum protection. Keep in mind that DI boxes are often placed right on top of bass amplifiers where huge power transformers are generating powerful magnetic fields. Power cables, lighting and dimmers also emit tremendous noise, If left unchecked, these will pollute the magnetic core and cause the unprotected transformer to distort.
Optimizing the audio signal
Way back in the 1970s, the first passive direct boxes employed common 600 broadcast line-level transformers. Broadcasters adopted the 600 standard due to their proliferation in telephone systems and this remains a standard that we employ today. Although these low impedance transformers work well for + 4dB to +20dB line level signals, low level sources such as magnetic pickups that produce -40dB to -20dB signals suffer due to loading. In other words, when the wrong transformer is placed in between the instrument, stage amp and PA system, too much of the signal is sent to the PA and the tone on stage suffers. For a passive DI box to work well, it must have a high input impedance. The JDI is designed with a super-high 130,000 input impedance which virtually eliminates the loading problems of the early 600 transformer.
Another trick that is designed into the Radial JDI is the extended frequency response. In audio systems, a greater degree of phase distortion occurs at the cut off points or where the frequency response shifts abruptly. By extending the frequency response beyond the usual 20Hz~20kHz audio range, we essentially move the problem out of the way. The JDI does not introduce phase anomalies that would otherwise become apparent within the listening range.
A good passive direct box must also be able to handle extreme dynamics without choking. Passive direct boxes do not distort like their active counterparts: they saturate. The JDI is truly amazing in that it naturally rounds out the dynamics like a very mild limiter. This effect is often referred to as sounding 'vintage'. When you consider most older audio devices are equipped with audio transformers, you can understand the connection. This makes the JDI particularly effective when used with high output devices such as digital pianos, active basses and electronic percussion. Ultimately, a world-class DI must deliver the sound of the instrument without noise, distortion or artifact of any kind.
Optimizing the performance
When you look at the JDI, there are a number of features that make it unique: The first thing you notice is the book-end design. Introduced in 2001, the book-end creates protective zones around the switches and connectors. DI boxes are often tossed on the ground, stacked and kicked. With this in mind, you will come to appreciate the extra protection when other DI boxes fail before an important show. And this protection is not merely cosmetic. Pick up a Radial DI box and you will immediately be struck by the weight. We use heavy, 14 gauge steel construction throughout. Inside, a unique I-beam frame houses the sensitive PC board and electronics. There is nothing stronger than an I-Beam. This is why they are used to build bridges and roof spans on commercial buildings. This ensures the PC board will not torque which could lead to solder joints going cold and premature failure. Inside, the switches are steel encased for durability and the connectors are made from glass-filled nylon to provide isolation. Nickel silver contacts will not tarnish and provide excellent signal transfer.
Standard features such as input, thru and output are of course included. The JDI goes a step further by adding a merge function that passively mixes the left and right outputs from a source such as a keyboard to mono. This saves valuable channels on the PA and eliminates the extra work of having to reprogram the keyboard or computer sound file.
An important feature built into the JDI is the 180º polarity reverse switch. This serves two functions: First, when combining two sources such as a direct feed from a bass and a microphone, reversing the polarity of one of the signals can often improve the sound by better aligning the stereo sources. This is most noticeable in the studio but also applies when attempting to align a loud stage amp with the PA system in a club setting. The second has to do with managing resonant feedback on stage when using the JDI with an acoustic instrument. Depending on where you are standing on stage, the sound from the PA system can interact with the room acoustics where certain frequencies will either sum together when in phase or be cancelled out when out of phase. Reversing the polarity on the JDI can often help by electronically moving the problem out of the way. And because you are not applying radical notch filters to the signal, you are not degrading the tone of the instrument.
As icing on the cake, the JDI is equipped with a second speaker level pad that lets you capture the sound from the high level output from the amplifier and speaker cabinet. When activated, this introduces a bandpass filter that rolls off the bass and treble to better replicate a 12" loudspeaker. This can be used to capture the distorted sound of guitar amp, the grind from a bass amp or even the distortion from an old tube Hammond organ or Leslie cabinet.
Over the years, the Radial JDI has received tremendous accolades from audio magazines around the globe, has won countless comparison studies and has become the single most specified passive direct box for concert touring on the globe today. Artists who use the Radial JDI include bassists Tony Levin and Nathan East, keyboard players Chic Corea and Tom Coster and specified on tours by audio engineers such as Robert Scovill (Tom Petty), Derek Williams (Bonnie Raitt) and Cub Colby (Phil Collins).
It is available in multiple formats such as the stereo Duplex and the JD6 six channel rack. The JDI can also be fitted inside the J-Rak and J-Clamp.
The Radial JDI is a passive direct box that combines a custom specified nickel laminated audio transformer with a proprietary passive circuit to perform the impedance conversion and balancing to deliver a mic-level signal. Analysis reveals an exceptionally linear response from 10Hz to 40kHz with virtually zero phase shift at all frequencies. The excellent performance is further substantiated with a Fourier transform that produces desirable even order harmonic generation and a warm Bessel curve when pushed hard. With its heavy-duty steel shell and internal I-beam construction, the JDI is designed to work dependably for years in even the harshest of touring environments. Ideal for keyboards, bass and acoustic instruments of all kinds the Radial JDI™ is quite simply the world's finest passive direct box.