TeachLogic IRF-3655 Forum Wireless Classroom Microphone System with 2 Sapphire Mics & 4 Ceiling-Mount Speakers

TeachLogic IRF-3655 Forum Wireless Classroom Microphone System with 2 Sapphire Mics & 4 Ceiling-Mount Speakers

TeachLogic IRF-3655 Forum Wireless Classroom Microphone System with 2 Sapphire Mics & 4 Ceiling-Mount Speakers

B&H # TEIRF3655CS4 MFR # IRF-3655/CS4
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  • 1Description

The IRF-3655 Forum Wireless Microphone System from TeachLogic is a sound-field system for classroom presentation. This system consists of an IMA-320 Amplifier/Receiver Base Station, two IRT-55 Sapphire Microphone Transmitters with lithium-ion batteries, an ICS-55 Ceiling Sensor for IR connectivity throughout the room, and four SP-628 Ceiling-Mount Speakers. It also includes a BRC-55 3-Port Drop-In Charger for charging the Sapphire transmitters.

Each lightweight Sapphire Infrared Microphone Transmitter comes with a rechargeable lithium-ion battery. It can be worn with a lanyard or clipped directly to your neckline collar. It transmits the vocal signal via infrared light to the ICS-55 Dome Sensor installed on the ceiling.

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 without obstruction. In addition, you will have 360° coverage and minimize the transmission distance for more reliable performance. The sensor collects the infrared transmission signal via 6 large detecting diodes.

The signal is then sent via the included 50' plenum-rated cable terminated with RCA connectors to the receiver input of the IMA-320 Forum Amplifier/Receiver Base Station where it is detected and then processed through the power amplifier to up to four SP-628 Ceiling Speakers (included). The receiver/amplifier supplies the power to the sensor.

The receiver base station's two wireless microphone channels provide freedom of movement and permit hands-free performance. Its two auxiliary line inputs provide multimedia integration via computers or DVD/iPod units. The base station also has separate outputs for both assistive listening and recording with active boards.

  • IMA-320 Forum Amplifier / Receiver Base Station with Switching Power Supply

    The IMA-320 Forum Amplifier / Receiver Base Station with Switching Power Supply from TeachLogic is the nucleus of the Forum Wireless Classroom Microphone System. This receiver is designed for use with the Sapphire, Crescent, or handheld microphone transmitters (all sold separately). These transmitters transmit the vocal signal via infrared light to the dome sensor (sold separately) installed on the ceiling. The signal is then sent via cable to the receiver input of the mixer/amplifier. The signal is detected and then processed through the power amplifier to the speakers.

    The amplifier / receiver includes 2 infrared microphone channels, 2 auxiliary line inputs for computers and DVD/iPod units, and a 3-band equalizer. The two wireless microphone channels provide freedom of movement and permit hands-free performance. The two auxiliary inputs provide multimedia integration. The built-in power amp delivers 32W of power to a maximum of 4 speakers (sold separately). It has separate outputs for both assistive listening and recording with active boards.

    Two infrared wireless microphone receiver channels
    Two built-in power amplifiers; 18W each
    Two stereo auxiliary inputs for DVD & computer / Aux
    Additional DVD input gain, adjustable +10 dB boost
    Front-panel auxiliary input (3.5mm)
    Three-band digital equalizer ± 12 dB
    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)
    Light weight aluminum cover
  • Infrared Dome Sensor

    TeachLogic's Infrared Dome Sensor needs to be installed on the ceiling at least 3' from the video projector. It comes with a mounting/support bracket and 50' 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.

    Easily installs on ceiling "T" bar with track bracket
    6 large receiving diodes for infrared reception
  • Sapphire Transmitter with Microphone and Lithium-Ion Battery

    TeachLogic's Sapphire Transmitter with Microphone and Lithium-Ion Battery is a lightweight classroom microphone and comes with a rechargeable lithium-ion battery. It can be worn with a lanyard or clipped directly to your neckline collar. It has high level output, reliable connectivity and great definition. With a built-in breath filter, the Sapphire can function as a pass-around hand microphone. With a tap on the power button, the microphone mutes for private conversation-tap again to restore to normal operation. The auxiliary input allows wireless playback of your iPod. A three-position slide switch provides selection of low, medium, or high microphone volume levels.

    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
    Channel A or B selectable
    Three level microphone volume switch (low, medium, high)
    Auxiliary input (3.5mm)
    Low profile clip for mounting
    Wear with a lanyard or directly to neckline collar
  • SP-628 Ceiling Speaker, Coaxial, 8 ohm, with Metal Back Can and Tile Bridge

    TeachLogic's SP-628 Ceiling Speaker, Coaxial, 8 ohm, with Metal Back Can and Tile Bridge is a full range compact coaxial ceiling speaker that provides low distortion and a smooth natural frequency response, making it great for articulate vocal clarity. The speaker has an integrated steel back can along with a 24" tile bridge which allows for quick and easy installation. The speaker is ETL Plenum rated and conforms to UL2043 standard.

    Air sealed metal back can for an infinite baffle
    6" cone driver with a 1" Mylar dome tweeter
  • BRC-55 Drop-In Charger for Sapphire and IRH-35/40 Microphones/Transmitters

    TeachLogic's BRC-55 Drop-In Charger for Sapphire and IRH-35/40 Microphones/Transmitters is a drop-in charger for two TeachLogic Sapphire transmitters and one IRH-35 or IRH-40 handheld micrphone/transmitter.

In the Box
Bundle Items
  • Switching Power Supply
  • Limited 5-Year Warranty on Parts & Labor
  • 50' 75Ω Dual-Shielded Plenum-Rated Cable
  • Limited 5-Year Warranty
  • Rechargeable Lithium-Ion Battery
  • Limited 5-Year Warranty
  • Galvanized Steel Tile Bridge
  • Limited 5-Year Warranty
Table of Contents
  • 1Description
  • IMA-320 Forum Amplifier / Receiver Base Station with Switching Power Supply
    Input Receiver: Infrared FM
    Modulation FM wide-band
    Frequencies Reception:
    Channel A: 2.08 MHz
    Channel B: 2.54 MHz
    Infra-red 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
    Sensor Input External: 2 x RCA
    Connectivity Coverage: 2,500.0 sq ft. (232.3 m2)
    AUX Input One DVD, line level, dual RCA with +10 dB gain control, one Aux input with front and rear panel 3.5 mm
    Line Output Two 3.5 mm with gain control (front panel)
    Equalization 3-band digital ±12 dB
    Output Power Two Amplifiers:
    Each: 18 W RMS
    Total: 36 W RMS
    Output Impedance 4 Ω 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) 8.50 x 1.75 x 7.50" (21.59 x 4.45 x 19.05 cm)
    Weight 1.50 lb (0.68 kg)
  • Infrared Dome Sensor
    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 ft2 (232.25 m2)
    Mounting Clip-on "T" bar bracket
    Connector Female RCA
    Indicator Lights Green LED for Power On
    Cable 75 ohm
    Dual-shielded
    Plenum-rated
    Cable Length 50' (15.24 m)
    Dimensions 4.62 x 1.37" (11.73 x 3.47 cm)
    Weight 0.46 lbs (0.2 kg)
  • Sapphire Transmitter with Microphone and Lithium-Ion Battery
    Transmitter Carrier: Infrared
    Transmission Frequency 2.08 MHz and 2.54 MHz
    Channel Channel A or B, Field Switchable
    Transmitting Diodes 6
    Modulation FM Wide-Band
    Pilot Tone Frequency: 32.768 KHz
    Peak Deviation ± 25KHz
    Operating Range 60' (18.28 m) line of sight, 1,500 ft² (139.35 m²)
    Indicator Lights Blue: full
    Purple: medium
    Red: low
    Flashing red: very low battery
    Battery 3.7V, 620mAh Lithium-ion
    Battery Life Approximately 8-9 Hours
    External Power Charger: DC +5V, Micro USB Connector
    Transmission Angle 180° Conical
    User Controls Power switch (push): on/off
    Mute switch (push): on/off
    Microphone switch (3 position): + 6db, normal, - 3db
    Auxiliary volume/gain: increase, decrease
    Channel select: A or B, in battery compartment
    Auxiliary External Input: 0.13" (3.5 mm) stereo line level
    Dimensions 3 x 1.25 x 0.75" (7.62 x 3.17 x 1.9 cm)
    Weight 1.4 oz (39.68 g)
  • SP-628 Ceiling Speaker, Coaxial, 8 ohm, with Metal Back Can and Tile Bridge
    Frequency Response 80 Hz to 15 kHz, ± 6dB
    Power 30 Watts Continuous
    Sensitivity 89dB SPL (1W/1M)
    Impedance
    Crossover Frequency 6 kHz
    Nominal Coverage Angle 90 x 90°
    Driver 5.25" (13.33 cm) Polymica/rubber
    1" (2.54 cm) high efficient domed tweeter, neodymium
    Enclosure Material Air sealed metal back can with infinite baffle
    Termination Screw terminals for secure speaker wire connection
    Mounting Three quick-mount clamps
    Dimensions (HxD) 5.5 x 8" (13.97 x 20.32 cm)
    Weight 5.12 lbs (2.32 kg)
    Magnet: 10 oz (0.28 kg)
  • BRC-55 Drop-In Charger for Sapphire and IRH-35/40 Microphones/Transmitters
    Compatibility Compatible with TeachLogic Sapphire and IRH-35/40 Microphones/Transmitters
    Power 110V
    Charging Time 10-12 Hours
    Indicator Lights Red: Charging
    Green: Charged
    Dimensions 7.75 x 2.75 x 3.75" (19.68 x 6.98 x 9.52 cm)
    Weight 1.75 lb (0.79 kg)

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