Radial Engineering Pro-Iso
Passive Stereo Line Isolator/+4dB to -10dB Converter with Radial Transformers


Our Price: $139.99
List Price: $160.00
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The Radial Engineering Pro-Iso is a stereo line isolator designed to convert a professional +4dB line level balanced signal to an unbalanced -10dB consumer level device.  This enables you to take the balanced output of a mixer and feed a consumer level recorder or audio input on a computer.

  • Converts balanced line level signals to unbalanced
  • Stereo signal path with set & forget level control
  • Transformer isolated to eliminate hum & buzz

The Pro-Iso employs a cost-effective transformer that focuses the energy in the voice range.  This makes the Pro-Iso a great choice for sermons, news gathering and spoken voice.

The passive design begins with 100% discrete components throughout.  A "set-and-forget" level control lets you attenuate the input signal to prevent it from overloading the destination device.  Output connections include a stereo pair of 1/4" connectors, a set of RCAs and a mini 3.5mm (1/8") for interfacing to a mini recorder or lap-top computer.  Transformer isolation helps eliminate hum and buzz caused by ground loops while eliminating stray DC currents from flowing.

Construction begins with 14 gauge steel throughout utilizing Radial's unique bookend construction.  This creates a protective zone around the connectors and controls for added durability.  The steel construction also assists by shielding the transformers from outside magnetic fields.  Inside, the J-Iso features an innovative I-beam skeletal insert that makes it virtually impossible to torque the PC board.  This reduces potential stress which could cause premature solder joint failure.

Designed for full range applications, the J-Iso combines exceptional signal handling with the type of durability that has made Radial famous.

Pro-Iso Applications:

  • Using the Pro-Iso to record a performance: Often, the available output on a professional console is balanced +4dB. This makes it difficult to feed a portable recorder.  The Pro-Iso comes to the rescue with a simple interface and all of the connectivity you need.
  • Using the Pro-Iso to convert a balanced signal: The Pro-Iso makes it easy to convert the balanced line level output from a preamp to a CD player or other consumer device.  Transformer isolation further benefits by eliminating hum and buzz caused by ground loops.
  • Using the Pro-Iso to feed a computer: The Radial Pro-Iso's Radial transformers help eliminate buzz and hum while delivering exceptional audio. Adjust the set & forget level control on the Pro-Iso to set signal level.
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