- 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
If you don't see the question you had in mind here, feel free to enter in the form provided along with your email address so we may send the reply directly to you. Thank's for your participation!
What is a direct box anyway?
A direct box is an impedance matching and signal-balancing device. DI's convert hi-impedance instrument signals to mic-level balanced lines for interface with pro-audio equipment such as mixing consoles. A good direct box will ensure proper electrical signals are maintained throughout the signal chain and allow long cable runs without added noise. A good DI box is just as important as a good microphone.
What is the difference between an active and passive DI?
This is somewhat similar to comparing dynamic mics to condensers. Active DI's have a built-in pre-amp that requires power to run while passive DI's use a transformer to convert the signal. Both 'transform' or convert the instrument's high-impedance output to a low impedance balanced microphone level. This allows long cable runs without adding unwanted noise and will improve the instrument's sound quality. The J48 uses phantom power to derive its power source.
What is phantom power and will it harm my other equipment?
Phantom power is a 48 Volt DC supply that comes from the mixing console on pins 1 and 2 of the XLR connector. It was originally designed to provide power to condenser microphones. It is usually 48 volts and between 5 and 15 mA. Most equipment used in pro-audio today is designed to interface when phantom is on. As such, phantom power will generally not harm your equipment.
Why do people use active direct boxes?
Active direct boxes tend to have more 'reach' in that they can capture harmonics and dynamics that can be lost with low-performance passive direct boxes. They are also less prone to loading the instrument, which can change the instrument's tone.
Can you explain loading?
Years ago, most bass guitars used regular output pick-ups such as those found on Fender basses. Musicians found that connecting the bass 'thru' a direct box and then splitting the signal to their amplifier caused the sound to change. This was caused by the added load of the direct box driving the signal to the mixer (and cable) that could be as far as 300 feet (100 meters) away. This would reduce the level going to the amplifier and change the tone.
Why is loading less of a concern today?
Back in the 1970's and 1980's, acoustic guitars did not have the sophisticated pick-ups and built-in pre-amps that are standard today. Electric basses now incorporate high-output pick-ups or have active electronics built in. Digital keyboards and synthesizers have high output levels. These are so powerful that loading is no longer a concern. This 'fix' has in fact caused a new problem: input distortion or saturation. Most DIs cannot handle the high levels of today's hotter instruments.
What makes the Radial J48 so special?
Let's begin by understanding how active DI's work: Active direct boxes are in fact unity gain preamplifiers. They drive the instrument's signal using what are known as buffers. This means that active direct boxes require power to run. As such, they must either get their power from batteries or phantom power from the console.
For the direct box to work properly, the batteries must be fresh. As soon as the power is low, the direct box will distort. This is why engineers hate batteries, and prefer phantom power. But phantom has limitations…
Phantom power was originally developed to supply low-current condenser microphones. Back then, no one ever figured that we would have to manage the dynamic levels of today's high-output active instruments. We recently tested a Takamine acoustic guitar with built-in pre-amp and found that when pushed to the max, the output peaked at 7 volts. Considering that most DI's can barely manage 2 to 3 volts, its no wonder guitars often sound harsh in a PA system. Active basses push the DI's further due to their powerful low frequency content and digital pianos are even more demanding.
The Radial J48 was specifically designed to solve this problem by boosting the internal rail voltage so that these instruments would not be able to overload the input. The J48 can be hit with as much as 9 volts and still sound great! This is called headroom.
Why does the LED not stay on?
We felt that every milliwatt of available power should be diverted to the audio signal path and provide maximum sound quality. Since phantom power has very little available current, we felt that lighting up an LED that requires almost as much current as the whole J48 circuit would not be wise. For the most part, direct boxes tend to be placed under keyboard racks or behind amplifiers and you can't see the light anyway.
Why do people use passive direct boxes?
Passive direct boxes are often chosen as they are 'plug & play' easy to use. When equipped with a high quality transformer, they can handle exceptionally high signal levels without harmonic distortion. A good one like the Radial JDI will process the signal without introducing artifacts such as phase distortion. This is achieved because the Jensen Transformer we use is extremely well made.
What is phase distortion?
Keeping your signal in-phase is akin to making sure that when you play guitar, the sound coming from the low E string plays at the same time as the G string when it comes out of your amp. You may take this for granted but the fact is, phase distortion can cause an instrument to get lost in the mix and make a bass sound muddy. Phase distortion can occur at all frequencies but is most noticeable in the bass or low frequencies. Try facing your stereo speakers close together and reverse the wires on one cabinet so that it is wired 'out of phase' and you will immediately become an 'in-phase disciple'.
When we tested several popular direct boxes, we found that most were fine at 1kHz. What surprised us is how they performed at 20Hz from absolute phase. One popular box was 40º out of phase, while another was 20º out. The best was the Radial JDI™ at a mere 4º while the J48™ comes in at a very respectable 9º. We spend thousands of dollars on PA systems to ensure they are time aligned (in phase) while lesser direct boxes ruin the sound even before it gets to the mix position!
Is a flat frequency response better than a colored response?
This is a good question. When buying a large diaphragm condenser microphone, you are not getting a flat mic, but getting a color or flavor for your sound palette. Most studios boast a selection of mics and the sign of a good engineer is 'knowing' which mic to use on what in order to get a particular tone. With direct boxes, it is usually not the case. If the sound of the guitar is not right, one will usually change the guitar not the direct box. Therefore, we believe the role of the direct box is to transport the original signal as faithfully as possible from the instrument to the destination and allow the engineer and producer to make the artistic choices.
Here's more food for thought… Should the direct box manufacturer change the tone? If it makes your Strat sound fat, will it make your Les Paul muddy? We think a properly designed DI should be faithful to the source. The Radial J48™ direct box is natural and uncolored.
What about tube direct boxes?
Tube direct boxes are cool and there is a definite place for them in the recording world. Tube DI's introduce personality to the sound and should be viewed in the same way as one views a large diaphragm microphone.
Can I use the Radial J48 for re-amping?
Re-amping is a two stage process. The Radial J48 is the perfect 'start point' for re-amping where you can connect your guitar, send the thru to your amp and the XLR out to the recording system. You will then need a device like the ProRMP or the X-Amp for re-amping. These take the dry recorded signal and send it back to the guitar amp and effects to complete the re-amping process.
Can I use the Radial J48 with a piezo pickup?
You could but it may not sound great. The problem with Piezo pickups is that they sound best when they 'see' a high input impedance. For piezos, you really want to be around 4meg-ohms or higher. The Radial JDV and Radial PZ-Pre are specifically designed for this.
Can the Radial J48 be used on keyboards?
Yes of course. For older Rhodes pianos or synthesizers it is perfect. You will likely need to use the pad to control the level as many keyboards today have super hot outputs.
What makes the J48™ better than the rest?
A good direct box needs to address several facets to be functional: The sound, the feature-set and construction are all essential parts that make up the whole. Let's start with the construction. The Radial J48™ is in fact two boxes in one. The inner skeleton features a 14-guage welded construction in which the PC board, circuit, transformer and switches are housed. Pick up the J48™ and you know you are dealing with quality. The rigid design ensures that there will not be any stress on the PC board and the solder joints will remain intact even after years of use. The outer book-end design provides easy access to the connectors while creating a natural protective zone for the switches. In the real world of concert touring, DI boxes are stepped on and abused. Radial direct boxes must be able to stand up to the abuse. No other DI box offers as many features. This makes the J48™ practical in pretty much any application. Finally, the sound of the J48™ is 'not'. Check out the specification and you will find that it is extremely linear from 20Hz to 20kHz, it exhibits almost no distortion in the most rigorous and demanding 20Hz region and with extremely low phase distortion throughout the audio bandwidth, what you put in - you get out. Nothing added, nothing changed.
Why choose a Radial direct box?
Passion and quality. We believe that today, what is missing in many products is a passion to build the product right. We are passionate about producing products that not only exceed the sonic norms, but also exceed the durability expectations.
How does the merge function work?
The merge is a passive resistive mix circuit that sums two input channels to mono. In other words, it takes the left and right outputs from a keyboard and mixes them together using the in and thru connections on the DI box.
Will the Thru output of the J48 provide signal if the unit does not receive phantom power?
Yes, the Thru will continue to mirror the input signal even when phantom power is not on. Just make sure the Merge function is not turned on.
My guitar amplifier has an input impedance of 1-Mohm. The J48 has an input impedance of 220-kohm. Why would they be any difference?
Traditionally a 1 meg-ohm input has been used on amplifiers and DI boxes, as it was the standard on TUBE amps. Back in 2001, we discovered that a 1 meg load on a tube circuit sounds very different than it does on a solid state circuit. This is likely why so many players dislike solid state gear! We noticed that when given a choice, 220k tends to be the choice that most players prefer with solid state direct boxes. Because of this, we set the input impedance of the J48 and Pro48 at 220k.
Is there is any reason not to use the merge function on the J48 or the JDI DI boxes so that I can use two different guitars for each input?
You can certainly use two instruments without a problem. The only issue here is that each one may produce a slightly higher output.