When you need for a powerful sound-field system package for classroom presentation, The IRF-2150 Forum 232 Sapphire System from Teach Logic is the answer. This system includes Forum receiver/amplifier (IMA-320), Sapphire transmitter/microphone with Lithium battery (IRT-60), Drop-in battery charger (BRC-55), ceiling dome sensor with 50’ plenum-rated cable (ICS-55), and speaker package of four ceiling speakers (SP-628), four wall mount speakers (SP-2000) or four lay-in ceiling tile speakers (SP-628L at an additional cost $80) including 100’ of plenum-rated speaker cable.

The Forum 232 receiver/amplifier (IMA-320) is same as the Forum system with additional features include: RS-232 wall panel control of the line inputs remote Teacher Security Alert, teacher priority with instant attenuation of the line levels via Sapphire IRT-60 pendant, Digital feedback guard (DFG) and switchable computer anti-hum circuit on computer input. The Forum 232 also features an output for recording the day’s lesson capture.

The Sapphire microphone / transmitter (IRT-60) is a stylish new lightweight classroom microphone. So small, it’s hardly noticeable to wear. It can be worn with a lanyard or clipped directly to your neckline collar. In performance, the Sapphire’s vocal clarity is unsurpassed. It boasts high level output, reliable connectivity and exceptional definition. With a built-in breath filter, the Sapphire can function as a pass-around hand mic. It also features security alert, teacher priority and remote input volume control.

The drop-in battery charger (BRC-55) is a 3-Port Drop-In Charger for one or two IRT-55 Sapphire transmitters and one IRH-35 Handheld transmitter.

The ceiling sensor (ICS-55) is the preferred infrared sensor for optimum performance. It comes standard with Forum, Maxim III, Spectrum II, VoiceLink I, VoiceLink Plus, VoiceLink III and VoiceLink IV packages. This unit needs to be installed on the ceiling at least 3′-0″ from the video projector. It comes with a mounting/support bracket and 50 feet of plenum rated cable with RCA connector on each end. The ideal location for the dome sensor would be in the center of the ceiling. This will provide a clear signal path for the IR transmission from the transmitter to the dome sensor without obstruction. In addition, you will have 360° coverage and will minimize the transmission distance for more reliable performance. It collects the infrared transmission signal via 6 large detecting diodes. The sensor is connected to the mixer/amplifier via a plenum rated cable terminated with RCA connectors. The mixer/amplifier supplies the power to the sensor.

The ceiling speaker (SP-628) is a full range compact coaxial ceiling speaker, providing low distortion and a smooth natural frequency response ideal for articulate vocal clarity. The SP-628 has integrated steel backcan along with 24″ Tile Bridge which allows for quick and easy installation.

The wall mount speakers (SP-2000) is a full range 2-way compact wall mount/shelf mount speaker, providing low distortion and a smoother frequency response ideal for articulate vocal clarity for more even coverage. The included wall-mount bracket enables the unit to be secured against a wall or other flat surface.
 
Instead of having SP-2000 wall mount speakers, you can choose lay-in ceiling speaker (SP-628L) which is a full range compact coaxial ceiling speaker, providing low distortion and a smooth natural frequency response ideal for articulate vocal clarity. The SP-628L is a complete loudspeaker assembly, with 12″ frame, perforated steel grill, and integrated steel back can and attached “T” bar for finish edge. It also provides quick installation with minimal tile cutting. It includes 100' of plenum-rated speaker cable.