TeachLogic IRS-8655 Spectrum III Infrared Wireless Classroom Microphone System with Sapphire Microphone/Transmitter & 4 Lay-In Ceiling Speakers

TeachLogic IRS-8655 Spectrum III Infrared Wireless Classroom Microphone System with Sapphire Microphone/Transmitter & 4 Lay-In Ceiling Speakers

TeachLogic IRS-8655 Spectrum III Infrared Wireless Classroom Microphone System with Sapphire Microphone/Transmitter & 4 Lay-In Ceiling Speakers

B&H # TEIRS8655LS4 MFR # IRS-8655/LS4

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TeachLogic IRS-8655/LS4 overview

  • 1Description

The IRS-8655 Spectrum III Wireless Classroom Microphone System from TeachLogic is a digital hybrid sound-field system for use in the classroom. This system comprises the IMA-820 Spectrum III Amplifier/Receiver Base Station, IRT-60 Sapphire Microphone/Transmitter with lithium-ion battery for voice transmission, ICS-55 Ceiling Sensor for IR connectivity throughout the room, and four SP-628L Lay-In Ceiling Speakers. It also includes a BRC-55 Drop-In Battery Charger for charging the Sapphire microphone/transmitter. The system can be added to an existing multi-media system for expanding its utilization to provide voice reinforcement.

The Spectrum III Amplifier/Receiver Base Station features dual IR receivers, four 100W Class D amplifiers, digital equalization, and digital limiting, providing freedom of movement and allowing simultaneous use of two microphones (one Sapphire microphone/transmitter included). When combined with the Sapphire transmitter, the Spectrum III base station delivers several key features such as Security Alert circuit, Teacher Voice Priority, and Remote volume control for line inputs. The four auxiliary inputs provide multi-media integration with even distribution of sound for all audio in the classroom.

The ICS-55 Dome Sensor collects the IR wireless signal from the microphone/transmitter via 6 large detecting diodes and sends a composite signal to the receiver the IMA-820 Spectrum III Amplifier/Receiver Base Station via the included 50' plenum-rated cable. The ideal location for the sensor would be in the center of the ceiling, providing a clear signal path for the IR transmission from the transmitter without obstruction.

The receiver transforms this composite signal into an analog audio signal which is fed to the multimedia amplifier. The amplifier powers the four SP-628L Lay-In Ceiling Speakers (included) for even voice reinforcement throughout the room. Each of the SP-628L Full-Range Compact Coaxial Lay-In Ceiling Speaker provides low distortion and smooth natural frequency response. Each speaker comes as a complete assembly with a 12" frame, perforated steel grille, integrated steel backcan, and attached T bar for finished edges. It offers quick installation with minimal tile cutting.

  • IMA-820 Spectrum III 4-Channel Receiver / Amplifier Base Station with Switching Power Supply

    The IMA-820 Spectrum III 4-Channel Receiver / Amplifier Base Station with Switching Power Supply from TeachLogic features four auxiliary inputs, dual IR receivers, page pass-through, and a 100W amplifier. This receiver has 100W of power for large rooms or rooms with high ambient sound levels. It helps create a good intelligible learning environment over a large area with up to 8 ceiling or wall speakers (available separately).

    The four auxiliary inputs provide multimedia integration with even distribution of sound for all audio in the classroom. The unit also features RS-232 wall panel control of the line inputs, fire alarm connection (AC or DC), remote teacher security alert, teacher priority with instant attenuation of the line levels via Sapphire IRT-60 pendant mic (available separately), DFG (Digital Feedback Guard), and switchable anti-hum circuit on the computer input.

    Sound-field system for large rooms
    Dual infrared wireless microphone receivers
    Power Amplifiers: 100W total RMS power; four 25W digital hybrid Class D amplifiers
    Security alert contact connection
    Fire alarm input AC or DC from 5 to 24V
    Page over-ride (muting) with page pass-through to classroom speakers; 100V, 70V, 25V input level
    Four line inputs for DVD, computer, MP3, and Aux
    Auxiliary input features mic or line level switch
    Anti-hum computer balun (On/Off switch)
    Front panel auxiliary input for MP3 (3.5mm)
    DVD input via dual RCA on rear panel
    3.5mm Aux and computer input on rear panel
    3.5mm lesson capture output with level control on rear panel
    3.5mm ALS output with level control on rear panel
    Five-band equalizer
    DFG (Digital Feedback Guard)
    Remote teacher priority over line inputs
    Power sleep mode to conserve energy
    Drop-in charger connection (5VDC, USB)
    Powers up to 8 speakers (not included)
    Rack or shelf mountable using optional kits (not included)
  • 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
  • IRT-60 Sapphire Infrared Transmitter/Microphone w/ Security Alert & Rechargeable Battery

    Well suited for classrooms and forums, the rechargeable IRT-60 Sapphire Infrared Transmitter/Microphone from TeachLogic offers the same aesthetic design and feature set as the IRT-55 Sapphire, but with an additional remote "Security Alert", allowing teacher priority with instant attenuation of the line levels to work with the optional Forum 232 and Maxim III amplifiers.

    The Sapphire can be worn with a lanyard or clipped directly to your neckline collar and offers a high level output, reliable connectivity, and great definition. With a built-in breath filter, the Sapphire can function as a pass-around hand microphone. Tapping the power button momentarily mutes the microphone, allowing for private conversations. The 3.5mm auxiliary input allows wireless playback of your iPod, while a three-position slide switch provides selections of low, medium, or high microphone volume levels. The included Lithium-Ion battery offers up to 9 hours use. The Sapphire IRT-60 ships with a BRC-15 wall charger and a breakaway lanyard.

    • 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
    • Lightweight Design: 1.4 oz
    • 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
    • Includes BRC-15 wall charger
  • Lay-In Ceiling Speaker

    TeachLogic's Lay-In Ceiling Speaker is a full range compact coaxial ceiling speaker that provides low distortion and a smooth natural frequency response ideal for articulate vocal clarity. Included is a 12" frame, a perforated steel grill, and an integrated steel back can and attached "T" bar for finished edge. It is a quick installation with minimal tile cutting.

    Complete speaker assembly (12 x 24")
    Perforated steel grill
    Heavy duty support for anti rattle or movement
    Attached adjoining T-bar
    Air sealed metal back can for an infinite baffle
    6.5" cone driver with a 1" Mylar dome tweeter
    Completely painted, tile white
    No speaker assembly required
    Quick and efficient installation
  • 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
  • Limited 5-Year Warranty
  • 50' 75Ω Dual-Shielded Plenum-Rated Cable
  • Limited 5-Year Warranty
  • Rechargeable Lithium-Ion Battery
  • BRC-15 Plug-In Wall Charger for Sapphire Transmitter
  • Breakaway Lanyard
  • Limited 5-Year Warranty for IRT-60
  • Limited 2-Year Warranty for Lithium-Ion Battery
  • Limited 5-Year Warranty

Also Includes

  • 100' Plenum-Rated 18 Gauge Speaker Cable
Table of Contents
  • 1Description
  • IMA-820 Spectrum III 4-Channel Receiver / Amplifier Base Station with Switching Power Supply
    Receiver Input Infrared FM
    Modulation FM Wide-band
    Reception Frequencies Channel A: 2.08 MHz
    Channel B: 2.54 MHz
    IR 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: 1,600 sq. ft
    AUX Inputs 4 x Aux
    Line Level
    1 x Dual RCA
    3 x 3.5mm
    1 x Anti-hum
    Line Output Lesson capture, 3.5mm with gain control, front panel ALS, 3.5mm with gain control, rear panel
    Page Over-Ride Input:100V, 70V, 25V, 3-pin Phoenix
    Sensitivity Level control
    Security Alert Contact closure N/O, N/C
    Fire Alarm 5 to 24 VAC/VDC
    Equalization 5-Band ±12 dB
    Output Power 4 x Amplifiers, 25 W each (RMS) 100 W total (RMS)
    Output Impedance 4 Ω
    Output Connection 2 x Phoenix connectors
    Charger Output 5 VDC, USB
    Power Supply 19 VDC / 6.3 A
    Certifications CE, CSA, and UL listed
    Dimensions (W x H x D) 8.5 x 1.7 x 7.5" (215.9 x 43.1 x 190.5 mm)
    Weight 2.20 lb (0.99 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
    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)
  • IRT-60 Sapphire Infrared Transmitter/Microphone w/ Security Alert & Rechargeable Battery
    Transmitter Carrier: Infrared
    Transmission Frequency 2.08 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' ² / 139.35 m²
    Indicator Lights Blue: Full
    Purple: Medium
    Red: Low
    Flashing Red: Very low battery
    Battery 3.7 V, 620 mAh Lithium-ion
    Battery Life Approximately 8-9 hours
    External Power External Power Charger: 5 VDC, micro USB connector
    Transmission Angle 180° conical
    User Controls Power Switch (Push): On/off
    Mute Switch (Push): On/off
    Microphone Switch (3 position): +6 db, normal, -3 db
    Auxiliary Volume/Gain: Increase, decrease
    Channel Select: A or B, in battery compartment
    Auxiliary Input External Aux Input: 0.13" / 3.5 mm stereo line level
    Dimensions (H x W x D) 3 x 1.25 x 0.75" / 7.62 x 3.17 x 1.9 cm
    Weight 1.4 oz / 39.68 g
  • Lay-In Ceiling Speaker
    Frequency Response 80 Hz to 15 kHz, ± 6dB
    Power 30 Watts Continuous
    Sensitivity 89dB SPL (1W/1M)
    Crossover Frequency 6 kHz
    Nominal Coverage Angle 90° x 90°
    Driver 6.5" (16.51 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 12 x 24" (30.48 x 60.96 cm) lay-in speaker assembly
    Thickness Panel: 0.62" (1.57 cm)
    Dimensions 12.25 x 23.75 x 6.25" (31.11 x 60.32 x 15.87 cm)
    With T-Bar Support: 13 x 23.75 x 6.25" (33.02 x 60.32 x 15.87 cm)
    Weight 8 lbs (3.62 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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