Radial JD7 features and functions

	JD•7 Features & Functions The Radial JD7 Injector is a guitar signal distribution amplifier and routing device housed in a standard 19” rack mount enclosure that allows a guitar signal to drive as many as seven (7) different devices such as guitar amplifiers, effect pedals and modelers. Any or all of these may be individually selected with the simple push of a button allowing one to create hundreds of combinations to spur-on the creative process.
	Central to the Radial JD7 is the ultra-clean Class-A signal path. The proprietary unity-gain circuit was developed specifically for high-impedance instruments where retaining the natural characteristic of the instrument is critical. In our view, changing the tone of a ’57 Strat is not an option. There are no op-amps or integrated circuits in the audio path. We employ the highest quality discrete components with Jensen® Transformers on the isolated outputs for the lowest possible distortion and optimal sonic performance. To further enhance the natural feel, the Radial JD7 introduces Drag™, a control that allows one to reintroduce the relationship between the guitar pickup and the amplifier that is invariably lost when amplifying or buffering the signal. Here’s the scoop: When you connect a guitar directly to an amplifier, the guitar pickup and the amplifier for a circuit that plays a unique role in the sound. The JD7 is in fact a signal amplifier that when placed in between the guitar and amplifier alters this relationship. All of a sudden, the pickup sees a perfect load while the amplifier sees a perfect source. The natural relationship is lost. Drag allows you to correct the problem by adjusting the load on the pickups. With a single control, one can ‘dial-in’ whatever amount of Drag sounds right. Best of all, Drag is extremely musical.
	JD7 Front Panel

		1.	Dual Input Switch selects between guitars. Also activates the ballanced input switch on the rear panel.
		2.	Drag™ control reintroduces the natural loading that occurs between your amplifier & guitar.
		3.	Clip LED indicator keeps your signal out of the distortion zone!
		4.	-8dB pad on input-2 for high output instruments like keyboards & active basses.
		5.	Output #1 is the primary output and is always connected for primary grounding.
		6.	ID strips for easy identification of channels - write on these with a removable marker.
		7.	On-off switch with LED indicator on each output for quick visual reference.
		8.	Ground lift & polarity reverse switches on outputs 2 to 6 to stop hum and correct phase of amps & effects.
		9.	Effect loop switches for outputs 5 & 6 lets you insert effects and do a/b sound comparisons.
		10.	Jensen® transformer equiped outputs for optimum audio fidelity and 100% isolation with no ground loops.
	The Radial JD7 is equipped with a tremendous feature set. The input features choice of A or B input select. Input B is equipped with an 8dB pad for high output instruments such as active basses or keyboards. A Clip LED indicator is also provided to ensure the signal stays out of the red. The input select switch is actually a dual function switch. When the ¼” B input is not used, depressing the B input will activate the balanced input on the rear panel. There are 6 outputs on the front panel and a 7th auxiliary output on the back panel. Output 1 is the main output and is always be used as it provides the primary ground path for the JD7’s floating circuit. Outputs 2 through 6 are Jensen transformer isolated to eliminate the hum and buzz that is encountered when connecting various tube and transistor amps together. All outputs feature an ON/OFF switch with LED indicator and are set at unity gain whereby what you put in, you get out. Nothing added – nothing lost. These outputs feature a ground lift to eliminate noise and 180º polarity reverse switch to allow you to ‘line-up’ all of the amplifiers and effects ‘in-phase’ for best tone. Channels 5 and 6 also feature switchable effect loops with individual ‘send and return’ jacks on the rear panel. This allows you to compare ‘dry and wet’ signals instantly.
	JD7 Rear Panel

		11.	Welded 14-gauge steel frame with baked enamel finish for maximum durability.
		12.	Innovative cable lock for the 15V DC power supply protects from accidental un-pluggings.
		13.	An all discreet Class-A circuit is used for highest signal integrity. There are NO op-amps in the signal path!
		14.	Separate send & return jacks for channels 5 & 6 to insert two independant and switchable effect loops.
		15.	Separate Ground lifts for the XLR balanced Line-In and Line-Out connectors.
		16.	Variable input level control allows precise level setting for playback of previosly recorded tracks.
		17.	Balanced XLR input allows recorded dry tracks to be sent through the JD7 to feed several amps or effects.
		18.	180º polarity reverse flips Pin-2 and Pin-3 at the XLR output.
		19.	Balanced XLR output is used to send a dry track to a recording device.
		20.	Aux 'Direct' output is always on and is typically used for a guitar tuner.
The rear panel features a 7th guitar level output that is typically used to connect to a rack-mounted tuner. Channel 5 and 6 effect ‘send and return’ loops are also located here. These are transformerless guitar level outputs that are generally used with rack-mounted effect devices. The Radial JD7 also features a low-impedance XLR balanced output and a balanced input on the back panel. The balanced-out allows the guitar player to simultaneously perform with a complete array of effects and amplifiers while sending a dry track directly to a recording device. Once the dry track has been recorded, the balanced XLR input is then used to feed the dry track from the recorder back into the JD7 and subsequent effects and amps. This allows the guitarist to sit in the engineer’s seat and experiment with new effect and amp combinations further expanding the creative process. The XLR input features an input level control that works in conjunction with the front panel overdrive LED to allow the user to set the JD7 for optimum performance.
Using the JD7 Capturing the creative spark during recording can be magic. Fiddling around with cables, pedals and amplifiers can be tedious and tiresome and can often cause one to lose the creative edge. The goal in developing the JD7 was to present the musician, engineer and producer with a creative tool that would allow instant access to complex signal routings and effect combinations and control them with a simple touch of a button. The Radial JD7 achieves this goal allowing one to focus creative juices on making music and instantly bringing new sounds and textures to life. The Radial JD7 is ‘unity gain guitar signal distribution amplifier’ with two selectable high impedance inputs and seven high impedance outputs. This means whatever level you put in, the JD7 will put out. Using the JD7 is plug & play easy. Plug in your guitar, your effects and amplifiers and you are good to go! The Radial JD7 is intuitive, easy to manipulate and maintains the original signal without degradation. Simply adjust the Drag control to where it ‘feels right’ and you are ready to enter a creative new world of new sounds. With seven outputs, amazing new textures can be created. The JD7 is ‘surround ready’ for 5.1 and 7.1 film scoring and layering. Now you can enjoy the thrill of actually being ‘inside’ the ethereal wall of sound! The JD7 is also equipped with a balanced output and a balanced input to allow dry recording and wet remixing of guitar signals. One simply records a dry track and then sends it back into the JD7. The JD7 lets you redistribute the signal to a variety of amplifiers and effect devices further expanding the creative process. Summary The Radial JD7 is a powerful tool that has been designed to spur on the creative process of making music. Ot is simple to use and without compromise. With the touch of a button, complete new sounds explode from your imagination giving way to a new creative process.

email: info@radialeng.com

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