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Radial Engineering J-ISO Jensen Transformer Equipped Stereo Isolator +4dB to -10dB Converter  

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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... Read More

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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.

•Balanced stereo line-level inputs with XLR connectors accept the +4db professional signal standard.

•Rugged XLR connectors are glass filled nylon, 100% electrically isolated, and eliminate chassis ground potential.

•Ground lift on outputs can eliminate hum and buzz caused by ground loops.

•Recessed level control makes fine adjustments to the unbalanced outputs for optimum recordings.

•Unbalanced -10 db output jacks provide quick and easy patching to any consumer audio device like stereo's and laptops.

•Book-end design creates a protective zone around the jacks and switches.

•Full bottom pad improves electrical isolation and keeps the unit in one place.

•High performance transformer for distortion-free signal transfer and 100% isolation from ground loop hum.

•Heavy-duty welded i-beam enclosure of 14 gauge steel makes it impossible to torque the pc board and eliminates cold solder joints.

•Military-grade pc board inside with full ground plane to reduce susceptibility to RF noise.

  • 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:
  • 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
  • Cool stuff:
  • Passive design doesn't need power
  • 'Plug & play' makes it easy-to-use anywhere
  • Compact and solid to handle abuse
90 day warranty on footswitch and tubes. One year warranty on all other products.

Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

Pro Coverage includes
  • Accidental damage protection (new gear only)
  • Expedited repair
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended return period
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to three years from date of purchase
  • Repair authorization-toll-free by phone or via the web
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Radial EngineeringJ-ISO Jensen Transformer Equipped Stereo Isolator +4dB to -10dB Converter

(based on 1 review)

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(1 of 1 customers found this review helpful)


Radial J-Iso, Jensen passive -10dBv to +4dBm


from Los Angeles, Ca

Comments about Radial Engineering J-ISO Jensen Transformer Equipped Stereo Isolator +4dB to -10dB Converter:

This thing is great! Since it is passive you can run in in reverse, like I am, to go from consumer to pro audio into a mic input! I chose this over the Radial J+4 because the J+4 is active so you can only run it the way it was intended, but having a passive unit gives me WAY more options. The J-ISO gives you roughly 14 dB (consumer and pro audio use different decibel scales so it's not exactly 14 dB!) of passive gain through a Jensen (famous for quality) transformer, doesn't require power, adds iron to your signal path, allows you to connect RCA, 3.5mm trs, or 1/4" connectors and run it into your mic pre! So you can record your mp3 player, dj gear, or just about anything into your console. It is not a DI box, so know that it isn't useful for guitars, or other 'hi-z' (high impedance) signals. The ground lift is great too, instantly killing hum, and being able to use balanced connections from any source is just amazing!

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