User manual
TeachLogic IRS-8650 Spectrum III Infrared Wireless

User Manual for TeachLogic IRS-8650 Spectrum III Infrared Wireless Classroom Microphone System with Sapphire Microphone Transmitter, Handheld Microphone Transmitter, & 4 Ceiling-Mount Speakers

• Product category: Assistive Listening Systems TeachLogic
• Brand: TeachLogic
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for TeachLogic Assistive Listening Systems

Product description

• 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
• Handheld Infrared Transmitter/Microphone with NiMH Batteries (Channel A and B) TeachLogic's Handheld Infrared Transmitter/Microphone with NiMH Batteries (Channel A and B) has an ergonomic design that provides user comfort and very low handling noise. The unidirectional condenser reproduces excellent vocal quality and the windscreen prevents breath pops. The emitting diodes are located around the top and bottom end of the handle for 360° transmission and assured connectivity throughout the classroom. Two rechargeable NiMH batteries are included.
  • Condenser microphone element
  • Power "on/off" switch
  • Battery level indicator-LED
  • 2-channel selectable
  • 10 high-power emitting diodes
  • Diodes at top and bottom of handle for increased coverage (2 top aimed out, 6 bottom 360°, 2 bottom aimed down)
  • 360º IR radiation for assured connectivity
• 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.

• 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

• 2 x NiMH Batteries

• Limited 5-Year Warranty

• Galvanized Steel Tile Bridge

• Limited 5-Year Warranty

Also Includes

• 100' Plenum-Rated 18 Gauge Speaker Cable

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Technical parameters

• 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 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)

• 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

• Handheld Infrared Transmitter/Microphone with NiMH Batteries (Channel A and B)

  Transmission	Carrier: Infrared
  Transmission Frequency	2.08 MHz and 2.54 MHz
  Channel Switching	A and B, 2-Channel Field Switchable
  Transmitting Diodes	10
  Modulation	FM Wide-Band
  Frequency	Pilotone: 32.768 kHz
  Peak Deviation	± 25 kHz
  Operating Range	60' (18.28 m), 2500 ft² (232.25 m2)
  Power Switch	On/Off Slide
  Battery Charge Display	Green (Useable Charge) Red (Needs Charging)
  Battery Life	Approximately 7 Hours
  Diameter	Head: 2.12" (5.38 cm) Body: 1.43" (3.63 cm)
  Dimensions	9.62" (24.43 cm)
  Weight	With Battery: 0.64 lbs (0.29 kg)

  Box Dimensions (LxWxH)	10.3 x 2.8 x 2.5"

• 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	8Ω
  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)

  Box Dimensions (LxWxH)	9.0 x 8.9 x 6.3"

• 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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