Radial Engineering J48 Premium Active DI
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SKU# J48
The J48 is a high performance active direct box for live concert touring and professional recording studio applications, with the ability to handle extreme transients without distortion while delivering the natural sound of your instrument.
The Radial J48 has gained a tremendous following through the professional audio community. With significantly more headroom, lower distortion and unmatched durability, it is no wonder that the J48 has become the most specified direct box on stages around the world. As you will note with the specifications below, the J48 is exceptionally linear when tested both under laboratory conditions and when placed under the extra stress of 100 meters (300 feet) of cable. In the lab, the high frequency response actually exceeds 40kHz! This makes the J48 a perfect candidate for the most demanding studio recording while being the obvious choice for the artist on stage.
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Higher Rail Voltage, Higher HeadroomMost battery-powered guitars and basses will produce as much as 7 Volts when played at maximum volume, which can easily overload typical active direct boxes that are only able to handle about 3 Volts. The J48 uses a unique switching power supply that raises the internal rail voltage so it can handle up to an incredible 9 Volts, resulting in improved signal handling and greater headroom. This additional headroom significantly reduces distortion of all types, allowing the natural tone and character of the instrument to shine through. . |
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J48 for Live TouringA 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. |
J48 in the StudioWhen 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 J48Reamping 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. |
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| Specifications | ||
|---|---|---|
| Audio circuit type: | Proprietary analog circuit with low-noise op-amp | |
| Frequency response: | 20Hz ~ 20kHz | |
| Dynamic range: | 109dB | |
| Total harmonic distortion: | 0.002% @ -5dBu | |
| Intermodulation Distortion: | 0.003% @ -3dBu | |
| Phase Deviation: | +10º at 20Hz | 0º at 1kHz | -1º at 20kHz | |
| Input Impedance: | 220k? - ¼" input | |
| Output Impedance: | 200? - XLR output | |
| Equivalent Input Noise: | -103dBu | |
| Noise Floor: | -99dB below 0dBu | |
| Maximum Input: | +10dBu | |
| Features | ||
| Input pad, Mono Sum, 180° polarity reverse, Ground lift, HPF | ||
| Input Connectors: | 1/4" | |
| Output Connectors: | Balanced XLR, 1/4" Thru | |
| General | ||
| Construction: | 14 gauge steel chassis and outer shell | |
| Size (L x W x D): | 3.3" x 5.0" x 2" (84 x 127 x 48mm) | |
| Weight: | 1.55 lb (720 g) | |
| Power: | 48V phantom - proprietary digital switching | |
| Conditions: | For use in dry locations only between 5°C and 40°C | |
| Warranty: | Radial 3-year, transferable | |