Radial J48 Stereo Active Direct Box

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SKU:
R800 3002
UPC:
676101043439
Weight:
1.80 LBS
Shipping:
Calculated at Checkout
Availability:
Usually ships within 24 hours.
  • Radial J48 Stereo Stereo Active Direct Box - Top
  • Radial J48 Stereo Stereo Active Direct Box - Right
  • Radial J48 Stereo Stereo Active Direct Box - Input
  • Radial J48 Stereo Stereo Active Direct Box - Output
  • Radial J48 Stereo Stereo Active Direct Box - Guitar
$379.99

Description

Phantom Powered Stereo Active Direct Box

The J48™ is a two channel active direct box that has been optimized to handle extreme transients without distortion, with a linear frequency response that extends from 20Hz up to 40kHz.

Features

  • Exceptional headroom & dynamic range
  • Retains the natural sound of the instrument
  • Use with stereo sources or multiple instruments
  • Powered by 48V phantom, no batteries required
  • Unbalanced 1/4" input jacks used to connect instruments to the J48 Stereo.
  • Thru-put from the J48 Stereo to a the amp. High impedance will not load instrument down.
  • 15dB Pad - Reduces the input sensitivity for active basses and high output keyboards.
  • Illuminates when 48V phantom power is present.
  • High pass filter reduces excessive low frequencies that can cause resonance and acoustic feedback on stage.
  • Balanced mic level outputs used to feed mixer or mic preamp.
  • Lifts the audio ground at the power supply to reduce hum and buzz caused by ground loops.
  • Polarity reverse use to correct the phase on old gear and reduce feedback on stage.

Higher voltage, higher headroom

Most battery-powered instruments and stereo keyboards will produce as much as 7 Volts when played at maximum volume, which can easily overload typical active direct boxes which have are only able to handle about 3 Volts. The J48 Stereo 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. The J48 maintains stereo separation between the left and right channels, allowing it to be used on two separate instruments or with stereo sources such as keyboards.

J48 Stereo Applications

Using the J48 Stereo with a keyboard

The J48's active circuit and amazing signal handling makes it a great choice for both digital and old school analog keyboards. A built-in pad reduces the sensitivity if needed.

Using the J48 Stereo with two basses

The compact design makes it easy to connect two guitars using one direct box. The great sounding active circuit sounds as good as other DIs costing five times as much!

J48 Stereo with two different instruments

Use the J48 Stereo with two completely different instruments. The low crosstalk makes it a great choice when doubling between bass, acoustic guitar, fiddle, or mandolin.

 

 

To meet the requirements of California Proposition 65, it is our responsibility to inform you of the following:
WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
Please take proper care when handling and consult local government regulations before discarding.

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Specifications

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 and there is no doubt that the J48 Stereo will follow suit. As you will note, the J48 Stereo is exceptionally linear with a frequency response that exceeds 40kHz. Just as impressive, it produces a wonderful cascade of even order harmonics reminiscent of the finest studio equipment. Amazing signal handling, great sound and low noise… The J48 Stereo rules!

Specifications

  • Audio circuit type: Proprietary analog circuit with low-noise op-amp
  • Number of channels: 2
  • 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: 220kΩ - ¼" input
  • Output Impedance: 600Ω - XLR output
  • Equivalent Input Noise: -103dBu
  • Noise: -99dB below 0dBu
  • Maximum Input: +10dBu

Features

  • Input pad, 180° polarity reverse, Ground lift, HPF
  • Input Connectors: 2x 1/4" in and thru
  • Output Connectors: 2x XLR

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

Block Diagram

Graphs

Frequency Response

Fast Fourier Transform

High Pass Filter On

IMD vs Output

Noise Spectrum

Phase Response

Distortion vs Output

Distortion vs Output
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Additional Information

WARNING:
Cancer and Reproductive Harm www.P65Warnings.ca.gov
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