$ 300.00 -13%
$ 259.99
  • Converts balanced line level signals to unbalanced
  • Stereo signal path with set & forget level control
  • Transformer isolated to eliminate hum & buzz
  • J-Iso features Jensen™ transformers for optimal signal path

The Radial J-Iso and Pro-Iso are stereo line isolators 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.

Two models are available:

J-Iso Part # R800-1025: The J-Iso employs a premium Jensen transformer for optimal signal transfer to minimize distortion and artefact. Full bandwidth performance makes the J-Iso ideal for music production.
Pro-Iso Part # R800-1150 The Pro-Iso employs a more 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 & forget level control lets you attenuate the input signal to prevent it from overloading the destination device. Output connections include a stereo pair of ¼" 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.

Specifications Radial J-ISO Radial Pro-ISO
Audio circuit type:  Passive, transformer based Passive, transformer based
Number of channels: Stereo (dual mono) Stereo (dual mono)
Frequency response:  20Hz ~ 20KHz (+0dB/ -1.5dB)   20Hz ~ 18KHz (+0dB/ -3dB)  
Dynamic range:  130dB  130dB
Maximum input:  +20dBu @ 1kHz/1% THD+N +20dBu @ 1kHz/1% THD+N
THD + Noise:  0.001% @ 1kHz 0.005% @ 1kHz
Phase deviation:  0.5° @ 100Hz; 1° @ 20Hz  1.5° @ 100Hz; 3° @ 20Hz
CMRR: -58dB -76dB
Input impedance:  1.3k Ohms, unbalanced  1.3k Ohms
Output impedance:  520 Ohms, balanced  1.9k Ohms
Transformer: Jensen JT-11-YMPC Radial transformer
Ground lift:  Disconnects XLR pin-1 at XLR input Disconnects XLR pin-1 at XLR input
XLR configuration:  AES standard (pin-2 hot)  AES standard (pin-2 hot) 
Connectors: Balanced XLR-F in; ¼", RCA and 3.5mm TRS unbalanced outputs
Construction:  14 gauge steel chassis 14 gauge steel chassis
Finish: Durable powder coat
Size: 84 x 127 x 48mm (3.3" x 5.0" x 2") 84 x 127 x 48mm (3.3" x 5.0" x 2")
Weight:  0.70 kg (1.55 lbs)  0.70 kg (1.55 lbs) 
Shipping size: 102 x 76 x 165mm (4" x 3" x 6.5") 102 x 76 x 165mm (4" x 3" x 6.5")
Shipping weight: .87 kg (1.92 lbs) .87 kg (1.92 lbs)
Power:  Passive, no power required  Passive, no power required 
Warranty:  Radial 3-year, transferable Radial 3-year, transferable
Conditions: For use in dry locations only between 5°C and 40°C For use in dry locations only between 5°C and 40°C
Specifications are subject to change without notice.


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