- 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 SeriesReamp 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.SGIJD7JX44SGI-44
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.JD7JX44mPress
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-ISOPro-ISOJ+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.SGISGI-44STAGEBUG 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.TwinlineMR5
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!JD7JX-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.jx44JR5
The JR5 is a remote footswitch that lets you select guitars, amps or effects when used with the JX44 and JX42.JR2BIGSHOT 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 SW2Twinline
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.JR2JR2-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 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.PhazeQEXTC-SA
The Radial EXTC-SA™ is a stand-alone audio interface that lets you incorporate guitar effects into the realm of pro-audio recording.EXTCTank 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-QTwin-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!EXTCShuttle
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-AmpChainDrive
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
Using The Space Heater™
The following page describes the basic functionality and some of the many applications that you will enjoy by adding the Space Heater to your setup. For complete details on how to use the Space Heater, we invite you to download the full manual by clicking on the icon at left.
Before making connections, always ensure your audio system is turned off or levels turned down to avoid plug-in or turn-on transients that could damage more sensitive components such as tweeters or headphones.
The Space Heater is an 8-channel device with stereo summing. The eight channels pass through four 12AX7 tubes, each of which is wired in stereo. All eight outputs are transformer coupled for isolation and analog character. While individual LEVEL and DRIVE controls can be found on each channel, other features are shared across both channels of the tube. It is important to understand these features before connecting your Space Heater for the first time.
Used to turn on and off each channel pair. When in the out position, the channel is bypassed completely. Audio is passed from input to output without being effected by the controls, tube, or output transformer.
- BUS ASSIGN
This switch is common to each channel pair and routes the channels to the stereo master bus. Individual channel outputs remain active.
Engaging this switch will set a high-pass filter across both channels.
- TUBE DRIVE ON
This switch activates the 12AX7 tube circuit for each channel pair. When in the out position, the Drive control and tube section are bypassed. This is useful when a cleaner signal is desired, as audio will only pass through the output transformer.
This switch sets the 12AX7's B+ voltage for each channel pair. 3 different voltages are available, each affecting the way the tube distorts in a different way.
- DRIVE & LEVEL CONTROLS
No matter how you decide to use your Space Heater, everything revolves around the DRIVE and LEVEL controls. DRIVE controls the amount of signal going into each tube. The more you turn up the drive, the more the tube will distort. LEVEL acts like an output fader, controlling the output of the channel.
Activating the BUS switch on each channel pair will route the audio to the Space Heater's master section. Odd channels (1, 3, 5 & 7) will be assigned to the left output, and even channels to the right output. Direct channel outputs remain active when using the master section, which allows for different parallel processing possibilities.
Activates the XLR stereo outputs.
- MIX BUS
Sets the output level of the main stereo outputs.
- HEADPHONE LEVEL
Controls the volume of the ¼" headphone output. This output is always on, allowing you to turn off the XLR outputs but still listen to the mix bus with headphones.
Using the Space Heater to mix tracks from your digital workstation
When mixing in a digital audio workstation (DAW) or even with some digital mixers, folks often complain that something is lost. There are lots of theories as to why or even if this actually occurs, but most agree that something magical happens when audio tracks are combined in the analog domain. The Space Heater handles this task with ease. Not only is it an extremely high quality, transformer coupled analog mixer; it also offers a tube circuit for endless personality!
A common method for using the Space Heater as an analog summing mixer alongside a DAW is to work with stereo stem mixes. This means that you mix similar instruments to separate stereo outputs. All panning is handled by the workstation, so the Space Heater is only performing the final stereo mix from these groups. When you engage the BUS switch on the front panel, odd channels are automatically routed to the LEFT bus and even channels routed to the RIGHT bus.
Because the tube drive section may be turned on and off for each channel pair, the Space Heater can be used when clean analog summing with slight vintage character is preferred. In this case, the signal will only pass through the level control and output transformer on each channel.
- Make sure all LEVEL and DRIVE controls are turned fully counter-clockwise to prevent accidental volume spikes.
- Connect your DAW outputs to the Space Heater's 8 individual channel inputs via ¼" TRS or DB25.
- Connect Left and Right XLR outputs of the Space Heater to your recorder. Try routing the final stereo mix back to new channels on your DAW for recording and monitoring or if you prefer, connect to a dedicated 2-channel tape machine.
- Turn each channel pair of the Space Heater ON and engage the BUS switch to assign outputs to the stereo mix.
- Turn the TUBE DRIVE ON for each channel pair where desired. Leave off if simple resistive analog summing through transformers is desired.
- Setup DAW or recorder to play back 4-stereo recordings assigned to the outputs connected in step 2.
- Turn MIX BUS ON and adjust level control. If sending the stereo mix back to your recorder, set the output level between 12 o'clock and 3'o'clock. If connected directly to studio monitors, set at a lower level until playback begins
- Begin playback. Slowly increase the LEVEL and DRIVE controls on any one channel (only LEVEL control is necessary if tube is not engaged).
- Adjust balance between LEVEL and DRIVE on all eight channels. Increasing the level will result in a cleaner sound while increasing the drive will introduce more distortion.
- Adjust the HEAT switch between the three different voltages. Lower voltages will starve the tube and result in a grittier distortion while higher voltages will produce a warmer overdrive.
- A Typical Selection is as follows:
- Drums Left...Ch-1
- Drums Right...Ch-2
- Bass Left...Ch-3
- Bass Right..Ch-4
- Guitars Left...Ch-5
- Guitars Right...Ch-6
- Vocals Left...Ch-7
- Vocals Right...Ch-8
Using the Space Heater as an insert on individual tracks
One of our favorite ways to use the Space Heater is as an effect on individual channels. Whether applying heavy distortion on a single instrument to completely change its character, or simply adding subtle warmth to a sterile recording, the Space Heater will add all kinds of analog mojo to the music.
To use the Space Heater on individual tracks, it should be thought of as a compressor or EQ. It can be connected in the following ways:
Hardware Insert: Most hardware mixing boards are equipped with insert jacks on every channel. These allow the Space Heater to be inserted before the fader on an individual channel. Sometimes the option to be pre or post EQ on the consoles channel strip is also possible.
Using in-line: The Space Heater is a professional +4dBu line level device and can be used in line (connected in series) with other analog hardware. Try connecting the output of a microphone preamp directly to a Space Heater input when tracking, or as the last device in a recording chain (mic pre --> EQ --> compressor --> Space Heater)
Software Insert: Most audio recording software provides a method of setting up hardware inserts within the program. These utilize different inputs and outputs on your audio interface, and allow them to behave as a hardware insert within your software. This is the most popular method of connecting the Space Heater when using it as an effect.
The Space Heater is a fantastic piece to add some excitement and punch to a drum kit by inserting it on individual channels. As you slowly bring up the distortion by increasing the DRIVE control, the audio will compress and become more present in the mix. Adding subtle distortion to a kick or heavy distortion to a snare is particularly effective as it is often difficult to increase the presence of these instruments without drastically increasing their level. A slight amount of distortion on a stem mix of the entire kit can really make a drum mix pop!
TIP: Try assigning the output of the Space Heater to a different channel on your recorder. This will allow you to bring up the distorted track separately from the original clean track. Playing back the two channels in parallel will allow you to adjust the blend between the two, which will allow you to dial in your sound even more quickly!
In Ear Monitors
In-ear monitor systems often sound sterile and out of place. Close-mic'd instruments and direct box signals passing through a digital console and into a pair of ear buds will not create the same sound as what is coming out of the PA system, where the speakers are actually moving air. Some musicians can never get used to them while others simply put up with the sound. The Space Heater quickly brings back the natural feel and tone that has been missing. Applying distortion to individual instrument tracks or even the stereo bus slightly compresses the signal without a loss of dynamic range. Less EQ and compression is required overall, and the added grit makes you feel like you are standing in front of a speaker instead of listening to tiny little buds!
Bass guitar is an instrument that can definitely benefit from some grit. First, it can limit the amount of compression needed, as the distortion will add harmonics to the bass sound, allowing it to live in a different frequency space that is not competing so closely with other instruments. Distortion can also help define bass frequencies in small speakers or headphones. Try applying a small amount of distortion with the Space Heater while listening with headphones. Even if the change is inaudible in larger speakers, it can make all the difference when listening on small speakers.
It is always a challenge to maintain a lead vocals presence in a mix, particularly in rock music where they are competing for space with distorted guitars. The guitar distortion tends to live in the same frequency space as the vocal, so turning up one will quickly mask the other. Using the Space Heater to apply a small amount of distortion to the vocal can help the track move into a different frequency space, bringing clarity and definition without resorting to heavy-handed compression or drastic EQ.
Keyboards, synths and various tone generators will all react differently when applying distortion. Experiment by running different signals and instruments through a channel on the Space Heater and listen to the results. Even simply running a fixed frequency tone through the Space Heater can transform the sound and enhance creativity.