Radial Engineering Twin-Iso Line Level Isolator, Passive 2-Channel Balanced with Jensen Transformers

The Radial Twin-Iso is a balanced 2-channel, line-level isolator that has been specifically developed for professional touring systems as a means to eliminate hum and buzz caused by ground loops when interfacing various equipment such as two consoles, remote towers and drive racks.

Central to the Twin-Iso is the use of world-renowned Jensen audio transformers. These assure the very best signal transfer without distortion caused by saturation or phase shift. All connections are balanced XLR following the AES standard with pin-1 ground and pin-2 hot. To add versatility, a polarity reverse switch is provided for each channel to ensure absolute phase is maintained throughout the audio signal path.

As with all Radial products, the Radial Twin-Iso features a rugged 14-gauge steel construction for maximum durability and to stand up to the rigors of pro-touring. The unique book-end design provides a protective zone for the switches while the full bottom no-slip pad provides plenty of ‘stay-put’ for more active stages. A unique skeletal design features welded I-beam construction, making it impossible to torque the internal PC board, reducing the opportunity for cold solder joints to develop due to outside stress. This unique design also permits up to eight Twin-Isos to be rack-mounted using the Radial J-Rak in just two 19” rack spaces.

Features

• Isolated XLR connectors to eliminate chassis ground potential
• Pair of Jensen audio transformers provide 100% isolation to eliminate hum and noise causing ground loops
• Military spec PC board with full surface ground plane to reduce susceptibility to RF noise
• High grade switches - ensure long life and reliable performance
  • Ground lift switch
  • One 180° polarity switch per output
• 14-gauge steel welded I-beam construction makes it virtually impossible to torque the PC board
• Book-end design creates a protective zone around the switches & connectors – indestructible 14-gauge steel construction
• Full no-slip rubber bottom pad provides mechanical isolation, electrical insulation and prevents unit from sliding around
• Heavy-duty baked enamel finish for excellent durability and great looks for years!

Specifications

• Audio Circuit Type: Passive line-level isolation, transformer based
  • Transformer: Jensen
• # of Channels: Stereo (dual mono)
• Frequency Response: 10 Hz to 50 kHz (±1 dB)
• Dynamic Range: 135 dB
• Total Harmonic Distortion: 0.001% @ 1 kHz, +4 dBu output
• Phase Deviation:
  • 0.5° @ 100 Hz
  • 37° @ 20 Hz
• Input Connectors: 2 x XLR-F
  • Input Impedance: 600 Ω, balanced
  • Maximum Input: +21 dBu @ 1 kHz, 1% THD+N
• Output Connectors: 2 x XLR-M
  • Output Impedance: 600 Ω, balanced
• Features: Ground lift, 180° polarity
• Power: Passive, no power required
• Conditions: For use in dry locations only, 5-40°C
• Dimensions (H x W x D): 1.875" x 3.25" x 5"
• Weight: 2 lbs