TOA IR-300M IR Tie infrared wireless microphone
The IR-300M is a hands-free infrared wireless microphone. It eliminates problems with interference or eavesdropping, allowing simultaneous use in adjacent conference rooms or school classrooms. Since infrared wireless microphone system uses a frequency band that does not interfere with that of the TS-800 and TS-900 series infrared conference system, both systems can be simultaneously installed in the same location.
| Battery |
IR-200BT-2 rechargeable battery for the infrared wireless microphone (option)
or AA alkaline dry cell battery (2 pieces). |
| Current Consumption |
Typ. 250 mA (2.4 V, Power selector switch: N)
Typ. 340 mA (2.4 V, Power selector switch: H) |
Infrared Emitter
| Wavelength |
870 nm (AM: Brightness modulation) |
| Modulation Method |
Frequency modulation |
| Carrier Frequency |
Channel A: 3.100 MHz
Channel B: 3.350 MHz |
| Transmission Distance |
Approx. 20 m (65 ft) (Power selector switch: H, in an unobstructed space)
Approx. 15 m (50 ft) (Power selector switch: N, in an unobstructed space) |
| Tone Signal |
32.768 kHz |
| Modulation Sensitivity |
±4.8 kHz (1 kHz, when SPL of 84 dB is input) |
| Maximum Input Sound Pressure |
120 dB SPL |
| Input Sensitivity Adjustment |
Adjustment range: -9 dB to 0 dB (factory preset: 0 dB) |
| Microphone Unit |
Unidirectional electret condenser microphone |
| Frequency Response |
100 Hz - 12 kHz |
| Preemphasis |
300 μs |
| Input |
External microphone input (φ3.5 monaural mini jack) |
| Battery Operation Time |
Approx. 8 h (when the IR-200BT rechargeable battery for the infrared wireless
microphone is used, Power selector switch: N)
Approx. 6 h (when the alkaline battery is used, Power selector switch: N) |
| Operating Temperature |
0 ℃ to +40 ℃ (32 ゜F to 104 ゜F) |
| Operating Humidity |
30 % to 85 %RH |
| Finish |
Control section: ABS resin, metallic gray, paint, 50% gloss
Filter section: Polycarbonate, optical cut filter |
| Dimensions |
64 (W) × 91.3 (H) ×27.3 (D) mm (2.52" × 3.59" × 1.07") |
| Weight |
130 g (0.29 lb) (with battery and strap) |
| Accessory |
Screw driver (for setting) …1, Color label (6 colors) …1 |