Radial Engineering Twin-Iso Balanced Line Isolator (B-Stock)

Balanced Two Channel Line Isolator for Hum and Ground Loop Elimination

The Radial Engineering Twin-Iso is a professional two-channel balanced line-level isolator designed to eliminate hum, buzz, and noise caused by ground loops when connecting audio equipment. It is built for touring systems, installed sound, broadcast environments, and live production setups where multiple consoles, drive racks, remote towers, or recording systems must interface cleanly. By isolating the signal path between devices, the Twin-Iso ensures clear, distortion-free audio transfer without unwanted noise.

Transformer Isolation for Clean Signal Transfer

At the heart of the Twin-Iso are high-quality isolation transformers engineered to maintain signal integrity while breaking ground loop paths. This design prevents saturation and minimizes phase shift, preserving clarity and detail across the frequency spectrum. Whether linking two mixing consoles, feeding a broadcast truck, or integrating playback systems into a PA, the unit maintains consistent, balanced audio performance.

AES Standard XLR Connections for Professional Integration

All inputs and outputs use balanced XLR connectors wired according to AES standards, with pin-1 ground and pin-2 hot. This ensures compatibility with professional audio systems and standard cabling practices. The isolated XLR connectors prevent chassis ground potential issues, further reducing noise in complex signal chains.

Polarity Reverse Switch for Phase Accuracy

Each channel includes a polarity reverse switch, allowing engineers to maintain proper phase alignment throughout the signal path. This is especially useful when combining signals from multiple consoles or when troubleshooting phase-related issues in live sound reinforcement and installed systems. Maintaining correct polarity ensures consistent low-end response and cohesive sound reproduction.

Rugged Steel Construction for Touring and Rental Use

Designed to withstand heavy professional use, the Twin-Iso features a welded 14-gauge steel inner chassis combined with a protective outer steel shell. The “book-end” design shields switches and connectors from impact during transport and setup. A military-grade printed circuit board with a full surface ground plane reduces susceptibility to RF interference. The full-bottom non-slip rubber pad adds stability while helping protect against electrical shock and surface damage.

Engineered for Professional Audio Environments

From touring racks to permanent installations, the Twin-Iso is built to handle demanding applications. Its heavy-duty construction minimizes torque stress on internal components, reducing the likelihood of solder joint failure over time. For engineers who require reliable line-level isolation between devices, this unit delivers dependable performance show after show.

**This B-Stock product has either been returned from a prior customer order or was used as a demo and repackaged. The product box may show signs of wear, and has had the manufacturer seal broken, but the product should remain in working condition. The item may show some signs of use, but it should not affect performance. All B-Stock items include the original manufacturer warranty, as we are an authorized reseller for this brand. This product is also covered under our return policy.