+4dB to -10dB Converter and Isolator

The Pro-Iso is a +4dB to -10dB converter that 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.

Exceptional signal handling

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 laptop computer. Transformer isolation helps eliminate hum and buzz caused by ground loops while eliminating stray DC currents from flowing.

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 any any -10dB consumer audio device. Transformer isolation further benefits by eliminating hum and buzz caused by ground loops.

Using the Pro-Iso to feed a computer

Computers are noisy at the best of times! The Radial Pro-Iso's effective transformers help eliminate buzz and hum while delivering exceptional audio. Adjust the set & forget level control on the Pro-Iso to set signal level.

Features

• Converts balanced line level signals to unbalanced
• Stereo signal path with set & forget level control
• Transformer isolated to eliminate hum & buzz
• Cost effective transformers targeting voice range
• Audio circuit type : Passive, transformer based
• Transformer : Radial transformer
• Number of channels : Stereo (dual mono)
• Frequency response : 20Hz ~ 18KHz (+0dB/ -3dB)
• Dynamic range : 130dB
• Total harmonic distortion : 0.005% @ 1kHz
• Phase Deviation : 1.5° @ 100Hz; 3° @ 20Hz
• Input Impedance : 1.3k Ohms
• Output Impedance : 1.9k Ohms
• Common Mode Rejection Ratio : -76dB
• Maximum Input : +20dBu @ 1kHz/1% THD+N

Ground lift, Level Control

• Input Connectors : Balanced XLR
• Output Connectors : 1/4", RCA and 3.5mm TRS unbalanced output

General

• Construction : 14 gauge steel chassis
• Size (L x W x D) : 8.4cm x 12.7cm x 4.8cm (3.3" x 5" x 2")
• Power : Passive, no power required
• Conditions : For use in dry locations only between 5°C and 40°C