The adoption of Class D digital power amplier and 30W high-efciency speaker design makes the output sensitivity up to 92dB.
The speaker built-in echo tube design presents stereo sound in bass to make people immersed in the high quality surround atmosphere and endless auditory feast.
High/low pitch optimization design, enhancing the response frequency in 50Hz and 20KHz range, regardless of high/low pitch sound quality is clearly distinguishable allowing teachers and students to interact under the pleasant sound.
The speakers installed at the front of the classroom are in a dilemma that they can be heard clearly at front but blurred in the back. The unique patented installation design of the CH-30W is easy to install in the center ceiling of the classroom creating a surround sound effect allowing the clearest and best sound quality in all space.
CH-30W Hi-Fi speaker allows teaching and presentations to clear sound quality. It can be used witat panel displays or projectors to create the smart classroom.
Thinner and lighter than a mobile phone, name card microphone less than 30 grams is convenient for teachers to hold it in your hand without any heavy discomfort. Built-in high-sensitivity condenser microphone to create the clear sound quality to let teacher or presenter behave well under the external noise or classroom fan.
The microphone uses 2.4G, 20 channels pairing mechanism, 3M pairing distance and within 3 seconds pairing time automatically. After pairing the frequency is automatically locked to prevent from interference. Under pairing microphone has 10M wireless distance so the teachers can freely teach around the classroom without any wire.
The microphone has 20 channels that can be automatically paired so teachers can use their own microphones to use them in different classrooms. Therefore, the teacher can carry his own wireless microphone going to different classrooms installed CH-30W speaker to use and the frequency is not interfered.
Because the frequency can be automatically paired, different teachers can also use their own microphones in different classrooms to use it at the same time, and the frequencies will not interfere with each other. It is very convenient for teachers to use.
Speaker spec. | |
Amplifier | Class D |
Wattage Output | 30W Stereo |
Speaker spec. | 2.75" 15W/8Ω x2 full rang (high performance speaker) |
SPL(Sound Presure Level) | 92sB/W |
Frequency Response | 50Hz ~20kHz |
Dimension | 254.1 x 250 x 90mm |
Weight | 1.5Kg |
Power Supply | Switching Power Supply DC12V/2A |
Input-Specker | Audio in x1, DC in x1 |
Input-MIC | MIC in x1, DC 5V in x1, Audio in x1 |
Audio Auto Off | 60sec |
Microphone spec. | |
Microphobne Type | Collar type |
Seneitivity | -37dB(f=1KHz, S.P.L=1Pa, 0dB=1V/Pa) |
Signal to Noise Ratio | 70dB |
Maximun Input SPL | 120dB(f=1KHz, THD<1%) |
Dimension | 85 x 42 x 10mm |
Wireless Spec. | |
Voltage Range | 3.6V ~ 5V |
Current | < 50mA |
Frequency Response | 2.4G ~ 2.483G |
Channel | 20 channels (Auto-match) |
Frequency Match | GFSK |
Audio Shift | < 1.5ms |
Dynamic Range@ 1KHz | 81dB |
Separating Degree@ 1 KHz | 90dB |
Distortion THD | 0.1% |
Matching Time | 3 sec |
Matching Distance | 2M < |
Frequency Match Distance | 30M (Free space) |
Battery Type | Lithium bettery |
Battery Time | at least 8 hr use |
Battery Change Time | 4hr from exhausted for full charge |
Receiver (Build in Speaker) | |
Sensitivitly | -85dBm(Min) |
Output Resistance | 32Ω |
Output Voltage | 2Vp-p(Max) |
Transmitter (MIC) | |
Transmitter Power | 10mW |
Input Resistance | 10kΩ |
Input Voltage | 2.8Vp-p(MAX) |
Power System | DC 5V(USB charge wire) |
Audio in | MIC in / Audio in |
Priority Channel | MIC first priority |
Other Spec. | |
Safety | CCC, SRRC, BSMI, NCC, CE,FCC |
Accessories-Speaker | Power cord x1, Power adapter x1, 3.5mm audio cable x1, Sponges, User's Manual( CD) , QSG |
Accessories-MIC | 3.5mm USB cable, Clip-on microphone, Sling |