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Radial JD7

The Radial JD7 Injector is a creative recording tool disguised as a guitar signal distribution amplifier that allows a guitar signal to drive as many as seven amplifiers simultaneously without loss or coloration.

Front panel control makes selecting amplifiers, ground paths and polarity (phase reversal) easy. The JD7 utilizes a newly developed Class-A audio signal path that has been optimized for use with electric guitars and is 100% discreet (no opamps or chips) producing the most accurate and faithful signal at each output. To eliminate such problems as 60 cycle hum caused by ground loops without signal degradation, the worlds finest audio transformers by Jensen are employed.

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Category: Pro Audio:DI Boxes:Multi-Channel


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The Radial JD7 also features a 600-Ohm balanced direct output to allow the engineer to record a dry guitar track or to use the JD7 as a direct box. A balanced input allows a pre-recorded track to be sent back into the JD7 which can then drive amplifiers, effect pedals and other devices.

Key Features:
  • 1-in, 7-out signal routing system for guitarists
  • One-touch super intuitive operation of all functions
  • Class-A circuit, Jensen Transformer isolated outputs
  • Natural sound does not introduce artifacts to the signal
  • Drag control recreates guitar to amp relationship
  • Balanced I/O - remix new sounds from dry tracks

Steve Vai Endorses the Radial JD7!
Radial Engineering Ltd. is pleased to announce that guitarist extraordinaire Steve Vai will now officially lend his name to supporting Radial's signal distribution amplifier, the JD7.

When asked about the JD7, Steve had this to say: "The Radial JD7 Injector is by far the finest guitar signal distro and Reamper I have ever come across. In fact it's the only one I have ever used that works cleanly with no hum or loading to the original signal. It has become an indispensable studio tool for me."

According to Radial president Peter Janis: "We'd been chatting on and off for several years but it was when Steve's sound tech Greg Wurth recommended one of our Switchbone ABYs I thought we should also send along our JD7. I remembered a discussion where Steve had mentioned being disappointed with all of the signal splitters he had ever tried . Turns out the JD7 made a great impression on Steve and we couldn't be happier. Who wouldn't want one of the most renowned guitar talents in the world backing one of your products? The JD7 did something for Steve Vai that he never thought he would find - a guitar splitter he was fully happy with. That's what we aim to do at Radial hence a great new relationship is born."

The Radial JD7 is considered a standard studio fixture for recording studios that specialize in tracking guitars. The fact that you can drive as many as 7 amps at the same time and then use it for Reamping makes it a very convenient and powerful piece of equipment. The critical advantage is the combination of Radial's award-winning class-A circuit design, Drag Control load correction and, of course, the liberal use of top-of-the-line Jensen transformers. This faithfully reproduces guitar signal without loading the pickup and sends it along to the amps with absolute purity.

Other top artists who use the Radial JD7 include John Petrucci, Steve Lukather, Neil Schon, Carlos Santana, Buddy Guy, Steve Rotherby, George Lynch, Metallica and Aerosmith.