Radial Engineering J+4 Balanced Signal Driver - Stereo Preamplifier

Radial Engineering J+4 Balanced Signal Driver - Stereo Preamplifier

Radial Engineering J+4 Balanced Signal Driver - Stereo Preamplifier

B&H # RAJPLUS4 MFR # R800 8015
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Product Highlights

  • Increases Gain for Low Output Sources
  • Boosts Signals to +4dB Line Level
  • Transformer-Balanced XLR Outputs
  • Versatile Inputs: RCA, 1/4 TRS, 1/8"

You Pay: $229.99

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Overview
  • 1Description

The Radial J+4 Balanced Signal Driver is a stereo preamplifier designed to accept unbalanced, low output devices such as instruments, computers, or CD players and boost the signal to a balanced +4dB level.

The J+4 includes a variety of input connectors to accommodate most audio sources; a stereo pair of both 1/4" and RCAs, and a single 1/8" stereo input. The control panel is easy to operate, consisting only of a stereo level control, a high pass filter, and a ground lift. The boosted signal then outputs from a stereo pair of balanced XLRs.

The J+4 features 100% discrete components for optimal signal transfer. Noise is eliminated by combining the advantages of active signal buffering with transformer isolation, resulting in better than 95dB signal to noise ratio. This also ensures hum and buzz caused by ground loops, along with spurious noise from clocking, will not pollute the signal path.

The Radial J+4 is built to handle the extreme rigors of the professional audio world. It delivers exceptional sonic performance, plenty of headroom and ultra low noise making it the ideal addition to any audio system with low output sources.

Boosts Signals to +4dB Balanced Line Level
The J+4 takes a -10dB consumer level audio product, such as an iPod or a DJ mixer, and boosts the signal to +4dB commercial level without adding noise or distortion.
Versatile Input Options
The J+4 has input connectivity for dual 1/4", dual RCA, and a single 1/8" stereo input.
Transformer Isolated
Transformer isolated circuitry eliminates noise caused by ground loops.
UPC: 676101039692
In the Box
Radial Engineering J+4 Balanced Signal Driver - Stereo Preamplifier
  • 3-Year Limited Warranty, Transferable
  • Table of Contents
    • 1Description
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    Specifications
    Circuit Type Active -10 dB to +4 dB line converter, transformer isolated
    Number of Channels Stereo
    Frequency Response 20 Hz to 20,000 Hz (± 2 dB)
    Dynamic Range 102 dB
    Maximum Input Level +17 dBu @ 1 kHz, 1% THD+N
    Total Harmonic Distortion 0.004% @ 1 kHz, +10 dBu output
    Phase Shift 0.5° @ 100 Hz; 4° @ 20 Hz
    Input Impedance 10k Ohms, unbalanced
    Output Impedance 1.6k Ohms, balanced
    Transformer JS2 Radial custom transformer
    HPF -3 dB @ 100 Hz (12 dB/octave)
    Lift Disconnects XLR pin-1 at isolated output
    Input Connections 1/4" x2, RCA x2, 1/8" Stereo x1
    Output Connections XLR (pin-2 hot) x2
    Construction 14 gauge steel chassis & outer shell
    Finish Baked enamel
    Power Passive, no power required
    Dimensions (W x H x D) 3.3 x 5.0 x 2" (84 x 127 x 48 mm)
    Weight 1.55 lbs (0.70 kg)
    Packaging Info
    Package Weight 2.55 lb
    Box Dimensions (LxWxH) 10.8 x 4.8 x 2.75"

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