Pro48™ Specifications

The Radial Pro48 is a high performance direct box that employs the same circuit design and switching power supply that has made the Radial J48 a standard on professional tours around the globe. The Pro48's smaller footprint force tighter part placement which in turn makes the circuit design more challenging. Yet the resulting tests prove that the Pro48 is able to stand up to other direct boxes costing significantly more. Low distortion and super quiet, the Pro48 is easily the best 48V phantom powered active direct box in its price category made today.

Specifications are subject to change without notice.
Audio circuit type: Proprietary analog circuit with low-noise op-amp
Frequency response: 20Hz ~ 20kHz (± 1.5 dB)
Signal to noise ratio:  
Dynamic range: 99dB
Noise floor: -82dB below 0dBu
Equivalent input noise: -86dBu
Maximum input: +9dBu
Phase deviation: +28º at 20Hz | +1º at 1kHz | -2º at 20kHz
Total harmonic distortion: 0.001% @ 0 dBu
Inter-modulation distortion: 0.002% @ 0 dBu
Input impedance: 220kΩ - ¼" input
Output impedance: 600Ω - XLR output
Input pad: -15dB
Ground lift: Disconnects pin-1 at XLR output
XLR configuration: AES standard (pin-2 hot)
Power: 48V phantom - proprietary digital switching
Construction: 14 gauge steel chassis and outer shell
Finish: Durable powder coat
Size: (W x H x D) Size: 2.75" x 4.25" x 1.75" (70 x 108 x 44mm)
Weight: 1.2 lb (544 g)
FCC approval: Complies with section 15 of the FCC Rules
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable
The Radial Blue Report
In effort to provide the more discerning audio engineer with all of the technical support materials to make a proper and informed decision, we have produced the Radial Blue Report. This provides in-depth distortion tests and analysis of four popular direct boxes....
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