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Radial Engineering J+4
Active Stereo Interface

OUR PART #:  J+4

Our Price: $229.99
List Price: $260.00
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Radial Engineering J+4
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The Radial Engineering J+4 is a stereo interface designed to accept consumer level -10dB unbalanced high impedance signals and convert them to +4dB balanced low impedance signals for easy manipulation in professional level environments such as broadcast, recording studios and live touring.

Noise is eliminated by combining the advantages of active signal buffering with transformer isolation. The J+4 delivers better than 95dB signal to noise while ensuring hum and buzz caused by ground loops along with spurious noise from clocking does not pollute the signal path. Controls have been kept to a minimum. This includes a stereo level control, high pass (low cut filter) and ground lift. A selection of input connectors include a stacked set of ¼`` jacks for DJ mixers or keyboards, RCA's for CD players and a mini 3.5mm for I-pods.

A unique 14-gauge steel I-beam inner frame ensures the sensitive PC board will not be subjected to outside stress which could potentially cause solder joints to fail. An innovative book-end outer shell creates protective zones around the sensitive controls, switches and connectors to further improve dependability while a full bottom no-slip pad provides both mechanical and electrical isolation.

The Radial J+4 balanced line driver delivers exceptional sonic performance, plenty of headroom and ultra low noise making it the ideal companion in today's more demanding professional audio systems.

Radial Engineering J+4 Specifications:

  • Frequency response:  10 Hz - 20 kHz (+/- 1dB … -3dB at 40 kHz)
  • Signal to noise:  100dB
  • Input level:  -10dBu typical
  • Maximum input level:  +17dBu
  • Maximum output level:  +15dBu
  • Dynamic range:  100dBu
  • Total harmonic distortion + noise:  0.004% (-10dBu input, +4dBu output)
  • Channel separation:  >90dB
  • Self noise:  -95dBu
  • Input impedance:  10k Ohms
  • Output impedance:  600 Ohms typical
  • High pass filter (low cut):  -3dB at 100 Hz
  • XLR configuration:  AES standard… pin-1 ground, pin-2 hot
  • Power Requirement:  15VDC 400mA center positive - 30mA draw
  • power supply included
  • Construction:  14 gauge steel chassis and outer shell, baked enamel finish
  • Size:  3.3" x 5.0" x 2" (84 x 127 x 48mm)
  • Weight:  1.55 lb (720 g)
  • Warranty:  Radial 3-year, transferable

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