Radial J48 Top View
Radial JDV Top View
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  • Radial J48 and Paul 'Pab' Boothroyd
    Paul 'Pab' Boothroyd

    "The Radial J48 is one piece of kit that can be relied upon from day to day in my worldwide touring. It is not only reliable but delivers what it needs to do... and that is deliver good audio."

    Paul 'Pab' Boothroyd
    (AC/DC, Paul Simon, Paul McCartney, Faith Hill, P!nk)
    Paul 'Pab' Boothroyd
  • Radial J48 and Tommy Emmanuel
    Tommy Emmanuel

    "I love my Radial J48 direct boxes! They produce a big, fat and clean signal that is so good, they are the ones I use for my live recordings. Thank you Radial"

    Tommy Emmanuel
    (Certified Guitar Player)
    Tom Emmanuel
  • Radial J48 and Joe Chicarelli
    Joe Chicarelli

    "I use the J48 every day. The signal path is clear, punchy, honest and faithful to the sound of the individual player's instrument."

    Joe Chicarelli
    (Bon Jovi, Tori Amos, Annie Lennox, The White Stripes)
    Joe Chiccarelli
  • "Radial DI boxes sound exactly like they're supposed to with no additional colour, hum or buzz."

    Serj Tankian
    (System of a Down)
    Serj Tankian
  • Radial J48 and Phil Keaggy
    Phil Keaggy

    "I thought Radials only worked on my car, but since my sound man hooked them up to my guitar, I like them even better... Great clear and pure sound!"

    Phil Keaggy
    (Acoustic Guitar Virtuoso)
    Phil Keaggy
  • "My guitar sounds warmer and richer with the Radial J48 than before with the other DI unit"

    Josh Turner
    Josh Turner
  • "I love the Radial J48 and don't leave home without it! I use the hell out of it."

    Guthrie Trapp
    (Garth Brooks, Tanya Tucker, Trisha Yearwood, George Jones, Alison Krauss)
    Guthrie Trapp
  • "I've tried virtually every DI out there, but the minute I tried the J48, I knew I was done. There's a clarity in this box that doesn't seem to exist in any others. Thanks, Radial!"

    Carl Miner
    (National Flatpicking Guitar Champion, The Greencards, Pink Martini, Sam Bush, and Taylor Swift)
    Carl Miner
  • "Radial gives you the natural sound you only get with a very high quality box!"

    Jimmy Haslip
    (John Scofield, Robben Ford, Donald Fagan, Yellowjackets)
    Jimmy Haslip
  • "The Radial DIs have become a staple in my studio and in my live rig. The units sound great, and I love the versatility they afford me in any situation."

    Dave LaRue
    (Dixie Dregs, Joe Satriani)
    Dave LaRue
  • "The audio crew went with their DI box on my bass. The DI was producing high frequency hum/noises. So, I asked my tech to take my J48 and use it! The J48 got rid of the high frequency hum and noise and problem solved. Great DI. Thanks again!"

    Melvin Lee Davis
    (Chaka Khan, The Pointer Sisters, Bryan Ferry)
    Melvin Lee Davis
Radial J48 Phantom Powered Active Direct Box

J48™ Phantom Powered Active Direct Box

Part No. R800 3001

  • Ultra low distortion of all types
  • Exceptional headroom & dynamic range
  • Retains instrument's natural sound
  • Powered by 48V phantom

The Radial J48 has been designed from the ground up to deliver the most natural tone. As a direct box manufacturer, we do not believe it is our task to alter the sound of your prized '1962 Fender Jazz Bass', but retain and transfer the true character of the instrument to the mixing console without adding distortion or introducing artifact. This design philosophy has gained a tremendous following from many of the world's most demanding musicians.

Using only 48V phantom power, the Radial J48 is an active direct box that produces an exceptionally linear response that extends from 20Hz up to well above 40kHz. Low distortion of all types is achieved via a unique digital switching power supply that raises the internal operating rail voltage for added headroom and improved signal handling. The results are truly amazing. The J48 delivers an ideal even-order harmonic cascade and a sonic performance that outperforms DIs costing several hundreds more.

And like all Radial products, the J48 is both feature-rich for studio and made tough to handle the road. This includes a -15dB input pad to tame extra loud signals, 180° polarity reverse for feedback control on stage and a ground lift to help reduce hum & buzz caused by ground loops. Special features include a merge function that elegantly mixes left-right signals to mono without phase cancellation. To minimize resonant feedback with acoustic instruments, the J48 is also equipped with an 80Hz high-pass filter (low-cut). When engaged, this also increases headroom by eliminating unneeded bass frequencies.

Radial's innovative book-end design protects switches and connectors from abuse while the internal I-beam construction eliminates stress on the PC board. This serves to reduce solder joints from going 'cold' and delivers trouble-free performance for years. A full-bottom no-slip pad provides mechanical and electrical isolation while providing plenty of 'stay-put' for rockin' stages!

The Radial J48 is used by artists as diverse as acoustic guitarist Tommy Emmanuel; super-star engineer Joe Chiccarelli; and one of the most successful bands of all time, Fleetwood Mac. The Radial J48... the world's finest 48V phantom powered active direct box.


Passive Direct Box


Tube Direct Box


Direct Box Rackmount Adaptors

J48™ - Applications
Using the Radial J48 for Live Touring
J48 for Live Touring
A direct box is primarily used to get an instrument signal from the stage to the mixing desk and PA system. The Radial J48 delivers the natural tone exceptionally long distances without adding distortion or coloring the sound in any way.

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Using the Radial J48 in the Studio
J48 in the Studio
When recording direct, the quality of the direct box interface assures the purest signal going to the track. The Radial J48 is particularly well suited for recording bass or capturing a direct track from a guitar.
Reamping with the Radial J48
Reamping™ with the J48
Reamping means sending a dry track from the recorder back out to pedals and amps. This tricks has been used for years by top professionals. The Radial J48 is ideally suited to capture the sound of the instrument for later Reamping.