When you need for a powerful sound system package for classroom presentation, The IRV-3415 VoiceLink Plus Sapphire system from Teach Logic is the answer. This system includes single channel infrared wireless receiver/amplifier (IMA-100), Sapphire transmitter/microphone with Lithium battery (IRT-55), battery charger (BRC-15), ceiling dome sensor with 50' plenum-rated cable (ICS-55), and choice of speaker package; four ceiling speakers (SP-628), two wall mount speakers (SP-2000) or two lay-in ceiling tile speakers (SP-628L) at an additional cost $40) including 60' of 18 gauge speaker cable.

The VoiceLink Plus sound system is an essential complement to the interactive whiteboard system: Whiteboard for visual, VoiceLink to reinforce the instructor’s voice and amplify media sources. The system features a single-channel wireless microphone receiver with a 20 watt amplifier to power two or four speakers. With a VoiceLink Plus wireless microphone system, the teacher’s voice will be clearly heard throughout the room with ease. And the auxiliary input on the front panel allows the input of an iPod™, computer, or DVD to supplement the instructional program.

The Sapphire microphone (IRT-55) 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.

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.
 
The 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.

The package also includes a plug-in type battery charger (BRC-15) used for IRT-55 transmitter / microphone.