J+4 | Buy Radial Engineering direct from Singapore's Authorized Distributor for warranty assurance.
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.
FEATURES:
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.Radial Engineering J+4 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)
For export (= shipments outside of Singapore) we do not charge GST. In this case, please refer to the prices excl GST.
