The IRS-8650 Spectrum III Wireless Classroom Microphone System from TeachLogic is a digital hybrid sound-field system for use in the classroom. This system comprises the IMA-820 Spectrum III Amplifier/Receiver Base Station, IRT-60 Sapphire Microphone/Transmitter with lithium-ion battery for voice transmission, IRH-35 Handheld Microphone/ Transmitter with Duracell NiMH batteries, ICS-55 Ceiling Sensor for IR connectivity throughout the room, and four SP-628 Ceiling-Mount Speakers. It also includes a BRC-55 Drop-In Battery Charger for charging both the Sapphire and handheld microphone/transmitters. The system can be added to an existing multi-media system for expanding its utilization to provide voice reinforcement.
The Spectrum III Amplifier/Receiver Base Station features dual IR receivers, four 100W Class D amplifiers, digital equalization, and digital limiting, providing freedom of movement and allowing simultaneous use of two microphones (one Sapphire microphone/transmitter and handheld microphone/ transmitter included). When combined with the Sapphire transmitter, the Spectrum III base station delivers several key features such as Security Alert circuit, Teacher Voice Priority, and Remote volume control for line inputs. The four auxiliary inputs provide multi-media integration with even distribution of sound for all audio in the classroom. The IRH-35 Handheld Microphone/Transmitter can be used by students for interactive class participation.
The ICS-55 Dome Sensor collects the IR wireless signal from the microphone/transmitter via 6 large detecting diodes and sends a composite signal to the receiver the IMA-820 Spectrum III Amplifier/Receiver Base Station via the included 50' plenum-rated cable. The ideal location for the sensor would be in the center of the ceiling, providing a clear signal path for the IR transmission from the transmitter without obstruction.
The receiver transforms this composite signal into an analog audio signal which is fed to the multimedia amplifier. The amplifier powers the four SP-628 Ceiling Speakers (included) for even voice reinforcement throughout the room. Each of the SP-628 Full-Range Compact Coaxial Ceiling Speaker provides low distortion and a smooth natural frequency response. Each speaker has an integrated steel backcan and comes with a 24" tile bridge which allows for quick and easy installation.