The Radial Twin-Iso Line Level Isolator is a studio-essential solution for eliminating ground loops, hum, and buzz from balanced line-level signals without sacrificing audio quality.
Built for professional recording studios, live sound rigs, and broadcast environments, the Twin-Iso delivers pristine signal isolation and rock-solid reliability, ensuring your audio stays clean, focused, and interference-free. The Radial Twin-Iso is a passive, two-channel line isolator designed around high-performance Jensen transformers to provide complete electrical isolation between connected devices. By breaking ground loops while maintaining full frequency response and phase accuracy, it solves one of the most common and frustrating problems in professional audio systems—noise caused by improperly grounded or interconnected equipment. Each channel features XLR inputs and outputs with individual ground lift switches, making the Twin-Iso ideal for interfacing mixers, audio interfaces, outboard gear, powered speakers, and broadcast equipment. With no power required and housed in Radial’s rugged steel enclosure, the Twin-Iso is a dependable, plug-and-play solution for both fixed installations and mobile setups where clean signal flow is non-negotiable.
Radial Twin-Iso Line Level Isolator Features
- Stereo isolator, withstands up to +21dB without distortion
- Eliminates hum and buzz caused by ground loops
- Suitable for balanced & unbalanced signals
- Exceptionally linear response from 20Hz to 20kHz
- Sub-mixing two consoles together
- Mixer to a remote amp rack or speaker tower
- Mixer to recorder or broadcast feed
- Between professional VTR and PA system
- Handles huge transients without distortion
- Completely passive, no power needed
- Eliminates hum and buzz caused by ground loops
- Dual-mono or stereo operation
Radial Twin-Iso Line Level Isolator Applications
- Using the Twin-Iso to isolate two mixers - Isolating two mixers is common practice in live touring as it allows the opening act to set their mix and feed it into the main act's console. By isolating the two, you eliminate the potential for ground hum and buzz caused by ground loops.
- Using the Twin-Iso on the amp rack - A common problem is the noise encountered when connecting two pieces of gear that may be powered on a different audio circuit. The Radial Twin-Iso easily solves the problem by isolating the input from the output of the other device.
- Using the Twin-Iso to eliminate noise - In the studio, you can sometimes come across old vintage gear that may sound great, but due to less than ideal grounding, may introduce noise. The Radial Twin-Iso is equipped with ground loops and 100% isolation to eliminate these types of problems.
Radial Twin-Iso Line Level Isolator Specifications
- Technical Specs:
- Audio Circuit Type: Passive line-level isolation, transformer based
- Number of Channels: Stereo (dual mono)
- Frequency Response: 10Hz ~ 50KHz (± 1dB), flat from 20Hz to 20kHz
- Dynamic Range: 135dB
- Maximum Input: +21dBu @ 1kHz, 1% THD+N
- Total Harmonic Distortion: 0.001% @ 1kHz, +4dBu output
- Phase Deviation: 0.5° @ 100Hz; 3° @ 20Hz
- Input Impedance: 600 Ohms, balanced
- Output Impedance: 600 Ohms, balanced
- Features:
- Transformer: Custom wound Eclipse ET-LD2
- High Pass Filter: -3dB @ 100Hz (12dB.Oct.)
- Ground Lift: Disconnects XLR pin-1 at isolated output
- XLR Configuration: AES standard (pin-2 hot)
- Connectors: XLR-F inputs; XLR-M outputs
- General:
- Construction: 14 gauge steel chassis & outer shell
- Finish: Durable powder coat
- Size: (W x H x D) 84 x 127 x 48mm (3.3" x 5.0" x 2")
- Weight: 0.70 kg (1.55 lbs)
- Shipping Size: W x H x D: 102 x 76 x 165mm (4" x 3" x 6.5")
- Shipping Weight: .87 kg (1.92 lbs)
- Power: Passive, no power required
- Conditions: For use in dry locations only between 5°C and 40°C
Radial Twin-Iso Line Level Isolator Includes
- Radial Twin-Iso Line Level Isolator
- User Guide
- Manufacturer Warranty
Sign Up for exclusive sales and offers!