Opus OP-FSM-02 Hearing Loop Receiver and Measurer Kit

The Opus OP-FSM-02 is a practical hearing loop receiver and measurer kit designed for checking loop performance and monitoring audio through headphones. Supplied as a complete kit with the OP-FSM receiver/measurer and OP-778 headphones, it provides a compact solution for assisted listening evaluation and everyday field use.

With true RMS measurement, color-coded LED indication, and a headphone output for direct listening, the OP-FSM-02 is built to support clear, reliable loop testing in professional and accessibility-focused environments. Its portable battery-powered design and long operating time make it a convenient choice for technicians, installers, and service teams working with hearing loop systems.

Key Features of the Opus OP-FSM-02

• Complete Measurement Kit: Includes the OP-FSM receiver/measurer and OP-778 headphones for a ready-to-use hearing loop testing solution.
• Hearing Loop Monitoring: Designed for receiving and measuring loop system performance in assisted listening environments.
• True RMS Measurement: Uses true RMS measurement with a 125 ms response for dependable monitoring.
• Color-Coded LED Display: Features an LED dot display for fast visual indication during use.
• Headphone Listening Output: Includes a 3.5 mm headphone connection for direct audio monitoring.
• Battery-Powered Operation: Runs on two AA batteries for portable field use.
• Extended Operating Time: Delivers up to 100 hours of operation for convenient long-term use.

Technical Specifications

• Brand: Opus
• Model: OP-FSM-02
• Product Type: Hearing loop receiver and measurer kit
• Kit Components: OP-FSM receiver/measurer, OP-778 headphones
• Operating Mode -20 dB Calibration: 0.043 A/m
• Operating Mode 0 dB Calibration: 0.400 A/m
• Measurement Type: True RMS 125 ms
• Frequency Response Filter: A/Flat
• Frequency Response 30 Hz to 500 Hz: -3 dB to -4 dB
• Frequency Response 500 Hz to 2.5 kHz: ± 0.25 dB
• Frequency Response 2.5 kHz to 10 kHz: ± 3 dB
• Display: Color-coded LED dot display
• Headphone Connection: 3.5 mm cinch
• Battery: 2 x AA
• Indicator Lights: LED
• Operating Time: 100 hours
• Dimensions: 3.27 x 4.96 x 1.38 inches
• Weight: 300 g

What's Included

• OP-FSM receiver/measurer
• OP-778 headphones