Mix engineer Tommaso Colliva on recording Drones : "All the amps were separated by big, foam baffles, and connected to our Radial JD7 Injector guitar signal splitter, which was in the middle of the room, and allowed us to quickly try things out."

Around the 15:34 mark in this Rock or Bust tour rig rundown of Angus, his tech shows two Radial Engineering JD7 units (one backup) that are used to send his guitar signal to "amps galore". Each head has it's own channel so that his tech can turn them on or off independently, and check phase.

"This is really a wonderful piece, this Radial. It's because it's a spliter box. So many times I've tried to find splitter boxes that don't load down the signal or change the quality of the amplifier signals. This is th best I've found so far," explains Steve Vai about the Radial Engineering JD7 Injector Guitar Signal Distribution System which he uses in his studio rig.

The JD7 proved to be a real asset during the recording and the best part was that my tone and the guitar's response remained true. I purchased it after we were done!

Petrucci about Radial JD7.

2 Radial JD7 Injectors can be seen in Corgan's rack at about 3:00 in this Rig Rundown.

“For the what happens next [sic] sessions, Satch cut down a bit on the usual carnival of gear, depending mostly on four Ibanez JS signature series models—his black JS25ART (bearing his artwork), two JS guitars in Muscle Car Purple (MCP), and a JS in Muscle Car Orange (MCO). Reamping played a key role in the project, with several of engineer John Cuniberti’s Reamp devices (vintage and new models) at the ready, as well as a Radial JD7 set up so that producer Mike Fraser and Satriani could easily switch amps.”

This video from DunlopTV features the guitar tech of TOOL's longest acting bassist, Justin Chancellor. As he discusses what items are in Justin Chancellor's rack unit, the top of the camera's view is a Radial Engineering JD7 Injector above his Demeter PreAmp.

Since adding the Radial JD7, SGI and Headbone to my rig, my sound on stage has never been better!

Joe Perry about his Radial equipment.

On Radial's website, King was mentioned as user of Radial JD7.

"Myung uses a Shure UR4D wireless. From there the signal goes into a switcher, then to a Radial JD-7 splitter that splits into three signals," reads this rig rundown, by Premier Guitar.

In this Premier Guitar rig rundown, Buddy Guy's guitar tech points out Buddy Guy's Radial JD7 Injector at 4:40 and says, "It gets any buzz, hum, or noise, 99% of the time."

The Radial JD7 can be seen as of 1:28.