TeachLogic The IRF-2150 LS-4 Forum 232 Sapphire Classroom Sound System

TeachLogic The IRF-2150 LS-4 Forum 232 Sapphire Classroom Sound System

TeachLogic The IRF-2150 LS-4 Forum 232 Sapphire Classroom Sound System

B&H # TEIRF2150LS4 MFR # IRF-2150/LS4
TeachLogic The IRF-2150 LS-4 Forum 232 Sapphire Classroom Sound System

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  • 1Description
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 ON/OFF switch
Teacher Priority instantly attenuates all line inputs
Three-band digital equalizer ± 12dB
Digital Limiting
Two stereo auxiliary inputs for DVD & Computer/Aux
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
  • 50' Plenum Cable
  • 100' Plenum Rated 18 gauge Speaker Cable
  • Infrared - Limited 5-Year Warranty
    Battery - Limited 2-Year Warranty
  • Table of Contents
    • 1Description
    Amplifier Forum 232 / IMA 232 Amplifier / Receiver
    Receiver Input : Infrared FM
    Modulation FM Wide-Band
    Reception Frequencies:
    Channel A: 2.08 MHz
    Channel B: 2.54 MHz
    Infrared Wavelength:850 nm
    Tone Signal Channel A:32.768 kHz
    De-Emphasis 50 μs
    Frequency Response 40 Hz , -18 kHz, ± 3 dB
    S/N Ratio ›65 dB
    THD ‹1% @1 kHz
    Nominal Deviation ± 10 kHz
    Maximum Deviation ± 25 kHz
    External Sensor Input: Two, RCA
    Connectivity Coverage: 2,500ft/² (232.26 m/²)
    Auxiliary Input One DVD, Line Level, Dual RCA with +10 dB Gain Control
    One Aux input with front and rear panel 3.5 mm
    Line Outputs 2-3.5 mm with Gain Control,Front Panel
    Equalization 3-Bands digital ±12 dB
    Output Power (RMS) Two amplifiers, @18 watts ea. (RMS),36 Watts total (RMS)
    Output Impedance 4 ohm minimum per channel
    Output Connection One Phoenix connector
    Power Supply 12 VDC / 2.8 A / 42 W CE,CSA and UL Listed
    Dimensions (W x H x D) 8.5 x 1.75 x 7.5" (21.59 x 4.45 x 19.05 cm)
    Weight 1.5 lb (0.68 kg)
    Microphone Sapphire Infrared Transmitter IRT-55
    Transmission Carrier: Infrared
    Transmission Frequency 2.08 MHz and 2.54 MHz
    Channel Switching A or B : Field Switchable
    Transmitting Diodes Six
    Modulation FM Wide-Band
    Pilot Tone Frequency : 32.768 KHz
    Peak Deviation ± 25 KHz
    Operating Range 1,500 Ft ² / 60' Line of Sight
    Battery Level Indicator
    Blue - Full
    Purple - Medium
    Red - Low
    Battery Type Lithium-ion ( 3.7 V / 620 mAh)
    Battery Life Approximately 8-9 Hours/Charge
    External Power Charger : DC +5 V, Micro USB Connector
    Transmission Angle 180° Conical
    User Controls Power Switch (Push) - On/Off
    Mute Switch (Push) - On/Off
    Mic Switch (3 position) - + 6 db, Normal, - 3 db
    Aux. Vol. / Gain - Increase, Decrease
    Channel Select - (A or B) in battery compartment
    Auxiliary Input External : 3.5 mm Stereo Line Level
    Dimensions (H x W x D) 3.00 x 1.25 x .75" ((7.62 x 3.18 x 1.91 cm)
    Weight 1.4 oz (39.69 g) with battery
    Infrared Dome Sensor
    Sensor ICS-55
    Operating Frequencies 2.3 mHz to 2.8 mHz
    IR Receiver 6 large lens diodes
    Coverage 360°
    Range 40-50' (12.19-15.24 m) line of sight, 2500 ft/² (232.25 m/²)
    Mounting Clip-on "T" bar bracket
    Connector Female RCA
    Indicator Lights Green LED for Power On
    Cable 75 ohm
    Cable Length 50' (15.24 m)
    Dimensions 4.62 x 1.37" (11.73 x 3.47 cm)
    Weight 0.46 lb (0.2 kg)
    Speakers LS-4 Package (4 - SP-628L 2-Way Lay-in Ceiling Speakers)
    Frequency Range 80 Hz to 15 kHz, ± 6dB
    Power 30 Watts Continuous
    Sensitivity 89 dB SPL (1W/1M)
    Impedance 8 ohms
    Crossover Frequency 6 kHz
    Nominal Coverage Angle 90° x 90°
    LF Detail Polymica / rubber
    Magnet 10 oz
    HF Driver Size High efficient 1"domed tweeter, neodymium
    Enclosure Material Air Sealed Metal Backcan Infinite Baffle
    White Powder Coated Finish
    Termination Screw terminals for secure speaker wire connection
    Mounting 1 x 2' Lay-in speaker assembly
    Attached "T" Bar support
    Dimensions (H x W x D) 12.25 x 23.75 x 6.25" (31.11 x 60.32 x 15.88 cm)
    13" (33.02 cm) with "T" Bar support
    5/8" (1.59 cm) panel thickness

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