Alex Turner uses a Radial J48 1-channel Active 48v Direct Box during The Last Shadow Puppet’s “Everything You’ve Come To Expect” tour. Alex uses this J48 to increase the headroom of his amplifiers without compromising sound quality. With such vintage gear, specially Turner’s Acoustic 160 stack, using the J48 allows him to drive the amp while delivering the pure and natural sound of the instrument.

The Radial J48 is an active direct box that has been specifically designed to work around the limited current that is available with 48-Volt phantom power, and do so while delivering the pure and natural sound of the instrument. A unique switch-mode supply steps up the internal rails to allow an input signal of up to 10V without any noticeable distortion. The single most important development goal of the Radial J48 was increasing the headroom without compromising sound quality. To this end, every possible effort was made to deploy the limited energy resources of phantom power to the audio signal path. To begin, phantom power is converted using a super-efficient digital switch-mode power supply that steps up the internal rail voltage to an impressive 10 volts. This allows one to hit the J48 with as much as 9-Volts without choking! To further increase available horsepower, all non-essential devices such a power-hungry LEDs are turned off when the J48 is in use. A typical LED requires almost as much current as does the complete audio circuit.

Pictured is Alex Turner during a show in 2016 during The Last Shadow Puppets second albums tour. The Radical J48 Direct Box can be seen next to his Boss Tuner and Watson Fuzz.

In this photo, which shows (a part of) Noel Gallagher's pedalboard, a Radial J48 is visible.

In a 2016 equipment check video at Alte Oper Frankfurt, John Petrucci of Dream Theater is shown using the Radial J48 Direct Box.

In Royal Bloods video with Fender on 'Troubles Coming' a Radial J48 DI box can be seen sitting under the EHX Cockfight on top of the Fender Supersonic Amp.

In this photo, taken from a 2021 MusicTech interview with Coldplay’s longtime producer, Rik Simpson, we get a good look at Jonny’s live synth set up for the band’s 2019 “Live in Jordan” performance, which seems to be all running through a Radial J48 DI Box, visible in the bottom center of the photo.

In this video, Misha's studio gear is shown to consist of a Radial J48 DI box.

According to this Guitar Geek rig diagram, Bill Kelliher used a Radial Passive DI Box (more specifically the J48) with Mastodon live in 2009.

In this photo, which shows Sultana's performance at WFUV public radio, the Radial J48 direct box can be seen.

Miles Kane uses a DI Box for the Acoustic Guitar

In an interview with Premier Guitar, John Bohlinger confirms that guitarist Steve Stevens utilizes a Radial J48 Direct Box as part of his live pedalboard setup.

This Radial J48 is owned by Deryck Whibley Of Sum 41

Serj Tankian uses the Radial J48 Direct Box, as featured on Radial's "Radial Artists - Electric" page, highlighting its ability to deliver uncolored, noise-free sound.