Radial Pro48 Top View
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  • Radial Pro48 and Ric Fierabracci
    Ric Fierabracci

    "I've been using Radial DIs for years and I am convinced that they are the best sounding DI's available today."

    Ric Fierabracci
    (Chick Corea, Billy Cobham, Andy Summers)
    Ric Fierabracci
  • Radial Pro48 and Paul Richards
    Paul Richards

    "Over the years, I have used a variety of DI boxes. The Radial J48 is without a doubt the best, cleanest and most versatile DI I've ever used."

    Paul Richards
    (California Guitar Trio)
    Paul Richards
  • Radial Pro48 and Rob Nevalainen
    Rob Nevalainen

    "The J48 works great. It is very transparent, which is important if you're trying to preserve the sound of your 1962 Fender Precision!"

    Rob Nevalainen
    (Tom Petty, Matchbox Twenty, Prince, Def Leppard, Rush)
    Rob Nevalainen
Radial Pro48 Active Direct Box

Pro48™ Active Direct Box

Part No. R800 1105

  • High performance active direct box
  • Increased dynamic range and headroom
  • 48V phantom powered with switching supply
  • Ideal for acoustic guitar and bass

The Radial Pro48 is a compact high-performance 48V phantom powered active direct box designed specifically for todays high output instruments.

The Pro48's innovative internal switching power supply significantly increases headroom producing less distortion while yielding a smooth, linear response that extends from 20Hz to well above 40kHz. This results in natural, uncolored signal that is as good or better than DI boxes costing several times more. The superior performance makes the Pro48 an ideal candidate for use with battery powered active basses and acoustic guitars that tend to overload other direct boxes.

The compact Pro48 is built road-ready with 14 gauge steel throughout. A unique bookend design creates a protective zones around the switches and connectors while the internal I-beam construction assures outside stress will not torque the PC board and deteriorate solder connections. A full bottom no-slip pads adds mechanical isolation and electrical insulation to further extend the Pro48's lifespan.

Exceptional sonic performance, great natural tone and an affordable price tag! The Radial Pro48 truly represents a breakthrough in value.


Passive Direct Box


Studio Reamper


Flange Mount Adaptors

Pro48™ - Applications
Using the Pro48 with acoustic guitar
The Pro48 is the perfect interface for acoustic guitar on stage. The high internal rail voltage is able to handle the dynamics of today's active instruments without choking and deliver the smooth, natural sound of the instrument.

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Using the Pro48 with bass
Whether you use an active or passive bass, the Pro48's exceptional signal handling is able to capture the sound of the instrument without distortion or adding artifact. And with proper loading, your bass will sound round and smooth when you record or play live.
Using the Pro48 with acoustic instruments
With more headroom and less distortion the Radial Pro48 is a great all-round active direct box for instruments of all types. This makes it particularly effective with instruments that can sound 'peaky' or 'edgy' when amplified.