Power Source 230 V AC, 50/60 Hz
(supplied AC adapter must be used)
Power Consumption 8 W (based on UL standards)
Max. 40.8 W (rated output at IR-820SP)
Receiving Frequency Teacher (Channel A): 3.100 MHz
Student (Channel B): 3.350 MHz
Receiver Sensitivity 50 dB or more, Signal to Noise ratio (40 dBμV input, 1 kHz modulation, ±4.8 kHz deviation)
Signal to Noise Ratio Tuner: 60 dB or more (60 dBμV input, 1 kHz modulation, ±4.8 kHz deviation,
A-weighted, Equalization: Centered)
AUX: 75 dB or more (A-weighted, Equalization: Centered)
Tone Squelch Frequency 32.768 kHz
Input AUX PC: line, -10 dB*, 10 kΩ, unbalanced, stereo mini jack (internal mixing)
AUX DVD/TV: line, -10 dB*, 10 kΩ, unbalanced, 2P RCA jack (internal mixing)
AUX MP3: line, -10 dB*, 10 kΩ, unbalanced, stereo mini jack (internal mixing)
Mute: 25 V line signals of telephone paging from a school intercom system
Output ALD (Assistive Listening Device): line, -10 dB*, 10 kΩ, unbalanced, monaural mini jack
Speaker: RJ45 (dedicated terminal for IR-820SP connection)
Frequency Response Tuner: 100 Hz – 12 kHz, AUX: 100 Hz – 20 kHz
Equalization High: ±10 dB at 10 kHz
Mid: ±10 dB at 1.3 kHz
Low: ±10 dB at 100 Hz
Mute Function Muted by 25 V line signals
LED Indicator Power (green) × 1, Infrared Reception (yellow) × 2, Mute (red) × 1
Operating Temperature -10 ℃ to +50 ℃ (14 ゜F to 122 ゜F)
Operating Humidity 90 %RH or less (no condensation)
Finish Panel: Aluminum, black
Case: Steel plate, black
Dimensions 210 (W) × 46 (H) × 312 (D) mm (8.27 × 1.81″ × 12.28″)
Weight 1.8 kg (3.97 lb)
Accessory AC adapter (DC cord length: 1.8 m (5.91 ft)) …1, AC power cord (2m (6.56 ft)) …1,
Volume control cover …6, Removable terminal plug (2 pins) …1
Option Half width blank panel: MB-15B-BK