Radial Engineering J+4 Balanced Signal Driver - Stereo Preamplifier

BH #RAJPLUS4 • MFR #R800 8015
Radial Engineering
Radial Engineering J+4 Balanced Signal Driver - Stereo Preamplifier
Key Features
  • Increases Gain for Low Output Sources
  • Boosts Signals to +4dB Line Level
  • Transformer-Balanced XLR Outputs
  • Versatile Inputs: RCA, 1/4 TRS, 1/8"
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.
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Expected availability: 7-14 business days
$229.99

Important Notice

  • This item is noncancelable and nonreturnable.

Radial Engineering J+4 Balanced Signal Driver - Stereo Preamplifier

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Radial Engineering R800 8015 Overview

  • 1Description
  • 2Boosts Signals to +4dB Balanced Line Level
  • 3Versatile Input Options
  • 4Transformer Isolated

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

Radial Engineering R800 8015 Specs

Circuit TypeActive -10 dB to +4 dB line converter, transformer isolated
Number of ChannelsStereo
Frequency Response20 Hz to 20,000 Hz (± 2 dB)
Dynamic Range102 dB
Maximum Input Level+17 dBu @ 1 kHz, 1% THD+N
Total Harmonic Distortion0.004% @ 1 kHz, +10 dBu output
Phase Shift0.5° @ 100 Hz; 4° @ 20 Hz
Input Impedance10k Ohms, unbalanced
Output Impedance1.6k Ohms, balanced
TransformerJS2 Radial custom transformer
HPF-3 dB @ 100 Hz (12 dB/octave)
LiftDisconnects XLR pin-1 at isolated output
Input Connections1/4" x2, RCA x2, 1/8" Stereo x1
Output ConnectionsXLR (pin-2 hot) x2
Construction14 gauge steel chassis & outer shell
FinishBaked enamel
PowerPassive, no power required
Dimensions (W x H x D)3.3 x 5.0 x 2" (84 x 127 x 48 mm)
Weight1.55 lbs (0.70 kg)
Packaging Info
Package Weight2.55 lb
Box Dimensions (LxWxH)10.8 x 4.8 x 2.75"
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