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The TeachLogic IRF-2150 LS-4 Forum 232 Sapphire Classroom Sound System is a 2-channel infrared sound field (with Security Alert) sound presentation system. It includes the IMA-232 Base 50-watt amplifier/mixer which features an automatic energy saving "sleep" mode, and two wireless microphone channels/receivers which provide more freedom and permits hands free performance. Two auxiliary line inputs provide multimedia integration with distribution of sound throughout the entire classroom. The system features two separate outputs for assistive listening and affords recording options with active boards.
The Forum 232 incorporates the Digital Feedback Guard (DFG), a 3-band equalizer, digital limiting, and RS-232 connection for control the panel (IMA-232). Additionally it features two infrared wireless microphone receivers and two 25 watt RMS power amps for a total of 50 watts of class D amplification.
The Sapphire microphone is a classroom microphone, and with its diminutive size, is hardly noticeable to wear. It can be worn with a lanyard or clipped directly to a neckline collar. The Sapphire has high level output, and is constructed to have stable connectivity and elicit exacting vocal definition. With a built-in breath filter, the Sapphire can function as a pass-around hand mic.
A unique Sapphire feature is that with a tap on the power button, the mic mutes for private conversation - tap again to restore to normal operation. Additionally, the auxiliary input allows wireless playback of your iPod through the Sapphire. The mic is built with a three-position slide switch for selecting low, medium, or high microphone volume levels.
For the IRF-2150 system, the ICS-55 comes standard as it was deemed the preferred infrared sensor by TeachLogic for optimum performance. This unit needs to be installed on the ceiling at least 3 feet from the video projector. It comes with a mounting/support bracket and 50 feet of plenum rated cable with an 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 four included SP-628L's are full range compact coaxial ceiling speakers, providing low distortion and full range frequency response 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. Quick installation with minimal tile cutting.
Forum 232 Amplifier
Two infrared wireless Microphone receivers
Two Power Amplifiers: Total 50 watts RMS class D
amplifier, 25 watts each channel
Security Alert Output
RS-232 wall panel control of line input levels
Switchable computer anti hum circuit with
Teacher Priority instantly attenuates all line inputs
Three-band digital equalizer ± 12dB
Two stereo auxiliary inputs for DVD &
Additional DVD input gain,
adjustable +10 dB boost
Front-panel auxiliary input (3.5mm)
Front Panel ALS Output for Assistive Listening
system with gain control (3.5mm)
Front Panel REC output for Lesson Capture with
gain control. (3.5mm)
Power sleep mode to conserve energy
Rack or shelf/wall mounting kits (optional)
Light Weight Aluminum cover
IRT-55 Sapphire Transmitter / Microphone
Long life lithium-ion battery
Rechargeable via micro USB cable
Battery level indicator, back light under power switch
Momentary mute button, backlight blinks in mute mode
Push "on/off" power
Three level microphone volume switch (low, medium, high)
Unique TAP feature on the power button, that mutes the mic for private conversation
Channel A or B selectable
Auxiliary input (3.5mm)
Low profile clip for mounting
Wear with a lanyard or directly to neckline collar
In the Box
TeachLogic The IRF-2150 LS-4 Forum 232 Sapphire Classroom Sound System