TOA IR-820SP ลำโพงติดเพดาน 20 วัตต์ ลำโพงเพดาน Infrared Speaker
The Infrared Wireless Microphone System using this IR-820SP is a PA system designed for use in the school classrooms assuming that their size is about 10 m × 10 m (30 ft × 30 ft). The IR-820SP is a ceiling-mounted powered speaker with the infrared receiver and offers a wide frequency range of high-quality sound output. It features a digital amplifer for the amplification section, and a full-range speaker for the speaker section. Use of the supplied mounting hardware and optional HY-TB1 Tile Bar Bridge permits it to be versatilely mounted to match a wide range of applications and installation locations. This speaker is combined with an infrared wireless microphone and the IR-802T Infrared Wireless Tuner to make up the infrared wireless microphone system. The infrared microphone system eliminates problems with interference or eavesdropping, allowing simultaneous use in adjacent school classrooms.
| Power Source |
24 V DC (supplied from IR-802T) |
| Power Consumption |
4.4 W (based on UL standards) |
| Rated Output |
20 W |
| Frequency Response |
100 Hz - 20 kHz (-10 dB) at installation in 1/2 free sound field
(Measured by installing the unit in the center of a ceiling.) |
| Amplification System |
Class D |
| Distortion |
5 % or less (rated output) |
| Speaker Component |
12 cm (4.72") cone-type |
Infrared Wireless Receiver
| Wavelength |
870 nm |
| Carrier Frequency |
Teacher (Channel A): 3.100 MHz
Student (Channel B): 3.350 MHz |
| Reception Angle |
360゜ (Horizontal) |
| Connection Terminal |
RJ-45 |
| LED Indicator |
Power (green) × 1 |
| Mounting Hole |
φ300 mm (φ11.81") |
| Usage Cable |
CAT-5 UTP |
| Operating Temperature |
-10 ℃ to +50 ℃ (14 ゜F to 122 ゜F) |
| Operating Humidity |
90 %RH or less (no condensation) |
| Finish |
Enclosure: Steel plate
Baffle: Fire-resistant ABS resin (resin material grade: UL94V-0)
Punched net: Steel plate
Filter section: Polycarbonate |
| Dimensions |
φ320 × 205 (D) mm (φ12.6 × 8.07) |
| Weight |
3.4 kg (7.5 lb) |
| Accessory |
Safety wire …1
Tile bar bridge: HY-TB1 |
