Radial EngineeringJ-ISO Stereo Isolator +4dB to -10dB Converter


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Radial J-ISO

The Radial Engineering J-ISO stereo interface takes a high output +4dB line level signal from a mixing console and converts it so that it may be connected to low-level unbalanced devices. In an effort to adapt to all of the variables, the output may be adjusted with a recessed set and forget level control. This makes it easy to connect professional audio gear with devices such as computer sound cards, iPods, or -10dB recorders.

The Radial J-ISO stero isolator has the smart features of the Radial PRO ISO but with the added sonic excellence of genuine Jensen audio transformers. Jensen transformers are equipped with nickel cores for high input levels before saturation. Their Mu-metal shields offer protection against electromagnetic fields. The result: 100% ground loop isolation for noise elimination, virtually zero phase shift, and they sound great!

To reduce noise problems, the J-ISO is equipped with an audio isolation transformer on each channel that helps eliminate hum and buzz caused by ground loops. Connections are straight forward: inputs are standard balanced XLR female while outputs include choice of stereo RCA, 3.5mm or standard 1/4".

All connectors and controls are protected with a book-end design and the J-ISO may be rack-mounted in the optional J-Rak (sold separately) or secured to a podium using the J-clamp. This makes the J-ISO an easy-to-use solution for interfacing between pro and consumer electronics and an ideal interface for recording events.

J-ISO Features

  • Nickel-core Jensen audio transformers
  • Stereo pro to consumer audio interface
  • RCA, 3.5mm and 1/4" outputs, XLR inputs
  • Variable output control to set optimum levels
  • Transformer isolated to eliminate hum & buzz
  • Applications as follows:
  • Record direct from mixers and mic-preamps
  • Interface +4dB pro-gear with unbalanced inputs
  • Recording interface for laptops and MP3 players
  • Swiss army problem solver and adaptor
  • Audio circuit type: Passive, transformer based
  • Number of channels: Stereo (dual mono)
  • Frequency response: 20Hz ~ 20KHz (+0dB/ -1.5dB) 
  • Dynamic range: 130dB
  • Maximum input: +20dBu @ 1kHz/1% THD+N
  • THD + Noise: 0.001% @ 1kHz
  • Phase deviation: 0.5° @ 100Hz; 1° @ 20Hz
  • CMRR: -58dB
  • Input impedance: 1.3k Ohms, unbalanced
  • Output impedance: 520 Ohms, balanced
  • Transformer: Jensen JT-11-YMPC
  • Ground lift: Disconnects XLR pin-1 at XLR input
  • XLR configuration: AES standard (pin-2 hot)
  • Connectors: Balanced XLR-F in; ¼", RCA and 3.5mm TRS unbalanced outputs
  • Construction: 14 gauge steel chassis
  • Finish: Baked enamel
  • Size: 84 x 127 x 48mm (3.3" x 5.0" x 2")
  • Weight: 0.70 kg (1.55 lbs)
  • Shipping Size: 102 x 76 x 165mm (4" x 3" x 6.5")
  • Shipping Weight: .87 kg (1.92 lbs)
  • Power: Passive, no power required
  • Warranty: Radial 3-year, transferable
Radial Engineering J-ISO Stereo Isolator +4dB to -10dB Converter Reviews