Radial Engineering Pro-ISO +4/-10 dB Stereo Line Isolator

BH #RAPROISO • MFR #R800 1150
Radial Engineering
Radial Engineering Pro-ISO +4/-10 dB Stereo Line Isolator
Key Features
  • Convert Balanced Line to Unbalanced
  • Transformer Isolated Eliminates Hum/Buzz
The Pro-ISO +4/-10 dB Stereo Line Isolator from Radial Engineering is designed to convert a professional +4 dB line-level balanced signal to an unbalanced -10 dB 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.
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Radial Engineering ProISO Overview

The Pro-ISO +4/-10 dB Stereo Line Isolator from Radial Engineering is designed to convert a professional +4 dB line-level balanced signal to an unbalanced -10 dB 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.

The Pro-ISO employs a transformer that focuses the energy in the voice range making it a suitable choice for sermons, news gatherings, and spoken voice.

The passive design employs 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 TRS for interfacing to a mini recorder or laptop computer. Transformer isolation helps eliminate hum and buzz caused by ground loops while eliminating stray DC currents from flowing.

Utilizing Radial's bookend construction, the Pro-ISO has 14-gauge steel construction throughout. 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.

Converts balanced line-level signals to unbalanced
Stereo signal path with set-&-forget level control
Transformer isolated to eliminate hum & buzz
UPC: 676101038480

Radial Engineering ProISO Specs

Circuit TypePassive, Transformer Based
Number of ChannelsStereo (Dual Mono)
Frequency Response20 Hz to 18 kHz (+0 dB/ -3 dB)
Dynamic Range130 dB
Maximum Input+20 dBu at 1 kHz / 1% THD+N
THD + Noise0.005% at 1 kHz
DeviationPhase: 1.5° at 100 Hz; 3° at 20 Hz
CMRR-76 dB
Input Impedance1.3 Kilohms
Output Impedance1.9 Kilohms
TransformerRadial Transformer
Ground LiftDisconnects XLR Pin-1 at XLR Input
XLR ConfigurationAES Standard (Pin-2 Hot)
ConnectorsBalanced XLR-F In; 1/4", RCA, and 3.5 mm TRS Unbalanced Outputs
Construction14-Gauge Steel Chassis
FinishBaked Enamel
PowerPassive, No Power Required
Dimensions (L x W x D)3.3 x 5 x 2" / 83.8 x 127 x 50.8 mm
Weight24.8 oz / 703 g
Packaging Info
Package Weight1.8 lb
Box Dimensions (LxWxH)6.4 x 4.2 x 2.8"
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