The 820iR delivers the essential features necessary to amplify a standard classroom environment. This system is compact and affordable. Choose from a wide range of LightSPEED speaker systems to ensure clear speech intelligibility for the entire classroom.




LightMic™ IR Wireless Microphone

Hands-free for the teacher, hand-held for the students.The 820iR is equipped with two independent channels allowing the use of two microphones simultaneously. The system includes the LT-71 LightMic™—a pendant-style wireless microphone that can be worn comfortably around the teacher’s neck.



Speaker Choices

LightSPEED offers multiple speaker options to provide optimum sound in every type of classroom.



Product Features

• Infrared wireless technology
• Two microphone channels
• LT-71 LightMic™ wireless microphone/transmitter
• Multiple speaker choices deliver optimal sound in all rooms
• Two speaker outputs with the ability to power up to 8 speakers
• Two stereo auxiliary inputs (TV, CD/DVD, PC, etc.) labeled for specific use
• One ALD output located on front panel (sends audio to personal FM system & recorder)
• 8-band graphic equalizer
• Built-in transmitter charging jacks
• Quick-install IR sensor
• Ability to power up to 3 IR sensors for large or odd-shaped rooms
• Multiple microphone options
• Five-year warranty (1-year on batteries)

Warranty: 5-Years on all major components

LightSPEED 800-series Classroom Amplification Systems are guaranteed against malfunction due to defects in materials and workmanship for a period of FIVE (5) YEARS, beginning at the date of the purchase invoice. Batteries are guaranteed for one year. The product will be repaired or replaced at LightSPEED's option during the warranty period. Warranty does not extend to finish appearance, or malfunctions due to abuse or misuse. Our Service Department (800.732.8999, M–F 6:30 a.m.– 5:00 p.m. PST) will handle all your troubleshooting and repair/replacement needs.

Product Specifications

Overall System

• Standard Carrier Frequencies (IR): 2.06/2.54 MHz
• Alternative Carrier Frequencies (IR): 3.2/3.7 MHz
• Frequency Stability: ± 3%
• Maximum Deviation: ± 50 Hz
• Dynamic Range: > 73 dB
• Signal-to-Noise Ratio: > 73 dB
• Frequency Response: 40 Hz – 20 kHz
• Equalization: 8-band EQ

Receiver Specifications

• Receiver Type: Superheterodyne
• Receiver Sensitivity: 6 µV for 60 dB S/N
• Image and Spurious Rejection: > 70 dB
• Reception Selectivity: 40 kHz
• Squelching Mute Level: Threshold 3.2 µV
• Sensor Inputs (F-Connector): 1 Input (Capability to power up to 3)
• Sensor Short Indicator: Yes

Amplifier Specifications

• Power Output (System Total): 12 W per Channel x2 (24 W Total)
• Total Harmonic Distortion: < 1% @ 10 W
• Speaker Load Impedance: 4 Ohms / Output
• Power Supply (UL Listed): 24 V / 2.5 A
• Weight: 3.9 lbs.
• Dimensions (W x D x H): 9.5 x 8.5 x 1.75

Inputs

• Auxiliary Audio (w/ Volume Control): (2) Dual RCA
• Infrared Sensor: 1
• Power: 24V/2.5A DC on Back Panel

Outputs

• Auxiliary Audio (w/ Level Control): (1) 3.5mm on Front Panel
• Speaker Outputs: (2) Binding Post Connectors
• Transmitter Charging: (2) on Back Panel

LightMic™ Specifications

• Audio Distortion: <1%
• Built-in Microphone: Uni-directional Electret
• Battery Power (1-year warranty): 2 AA NiMH Rechargeable
• Dimensions (W x D x H): 1.4" x 1" x 4.6"
• Weight (with batteries): 3.7 oz

Handheld Microphone/Transmitter

• Audio Distortion: <1%
• Microphone element type: Uni-directional, Dynamic
• Batter Power (1-year warranty): 2 AA NiMH Rechargeable
• Weight (with batteries): 7.4 oz

Sensor

• Type: External
• Power: From Receiver/Amplifier
• Reception Coverage: 360 degrees, ceiling mount
• Cable: 50 ft, 50 ohm Plenum rated Co-Ax
• Mounting: Ceiling Clip/Wall Bracket
• Diodes: 32