This device enables the setup of a dual-loop induction hearing system through intentional phase-shifting of the audio signal. The signal is shifted by 90° and forwarded to a second loop amplifier of the ISV series, or directly to a second induction loop, while the first amplifier transmits the unmodified 0° signal.

Such dual-loop systems are ideal for large venues or environments where metal reinforcements in concrete interfere with the magnetic induction field — typical use cases include churches, exhibition halls, train stations, schools, and gyms. Phase modulation ensures a constant and homogeneous magnetic field, significantly improving intelligibility for hearing aid users.

The system is compliant with EN 60118-4, and offers effective coverage of large areas with minimal energy loss thanks to reduced loop resistance.

Technical details:

• Product type: Phase modulation module for dual-loop induction systems
• Function: 90° audio signal phase shift
• Compatible devices: ISV series loop amplifiers
• Application area: Large venues with metal interference in flooring
• Standard compliance: EN 60118-4
• Recommended use:
• Churches
• Train stations
• Exhibition halls
• Schools
• Sports halls
• Signal routing:
• Channel 1: 0° (original signal)
• Channel 2: 90° (phase-shifted)

Included items:

• Phase modulation module
• Connection accessories (depending on model)
• User manual

Special features:

• Enables dual-loop system with stable magnetic field strength
• Significantly improves speech clarity for hearing aid users
• Up to 4x lower power loss across loop area
• Ideal for acoustically challenging, large-scale venues