Radial ProISO Voice Range Passive Converter

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 º" 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.

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
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.

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.

Features:

• XLR Inputs: 4dB balanced follow AES standard for easy interface with professional gear.
• Ground Lift: Disconnects ground at the XLR pin-3. Helps eliminate hum and buzz caused by groud loops.
• Output Level: Used to adjust the signal for optimal recording is recessed so that it cannot be accidentally changed.
• Unbalanced Outputs: Choice if 1/4 and RCA stereo outputs for easy patching with studio and consumer audio equipment.

Specifications:

• 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
• 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")
• Weight: 0.7 kg (1.55 lbs)
• Shipping size (L x W x D): 10.2cm x 7.6cm x 16.5cm (4" x 3" x 6.5")
• Shipping weight: 0.87 kg (1.92 lbs)
• Power: Passive, no power required
• Conditions: For use in dry locations only between 5?C and 40?C
• Warranty: Radial 3-year, transferable