What is a Bullhorn?

A portable loudspeaker is a kind of loudspeaker that is convenient to carry and has a compact appearance and simple operation. Mostly used for classroom teacher teaching or guided tours, which can help them reduce the volume and protect their throats. It is especially common in high school classrooms.

Portable amplifier

This entry lacks an overview map . Supplementing related content makes the entry more complete and can be upgraded quickly. Come on!

A portable loudspeaker is a kind of loudspeaker that is convenient to carry and has a compact appearance and simple operation. Mostly used for classroom teacher teaching or

What is a portable amplifier? As the name suggests, portable speakers are convenient to carry, and most of them are equipped with a small size, light weight, and simple operation. With the advancement and development of science and technology, portable amplifiers are no longer limited to the use of general amplifiers, and new functions are constantly being improved. They support U disks, TF cards, radio and recording functions, and remote control functions .

With the expansion of education enrollment and the growing tourism industry, teaching and tour guides need to use loudspeakers at normal volume. The voice is also clear and bright to ensure the quality of teaching and tour guides. The birth of portable loudspeakers has solved the problem of teachers and guides. Worrying about the future, easy to carry, easy to operate, battery replacement is more convenient and quick, well received by teachers and tour guides.

Portable amplifiers can be divided into:

, Promotional loudspeaker, entertainment loudspeaker,

First, turn on the loudspeaker switch, try to maximize the sound, and listen for noise. If there is no noise, it means that the loudspeaker works quietly without any noise. Some poor quality amplifiers are prone to noise at this time. Such amplifiers are not worth buying, and it won't take long.

Second, when the sound of the loudspeaker is maximized, use the loudspeaker for amplification. Listen carefully to see if the amplified sound is distorted. If the loudspeaker is at its loudest, the sound quality is clear and the sound is loud enough. Such a loudspeaker is probably not a bad one.

Third, the workmanship of the loudspeaker, although the appearance is not the most important factor, but the workmanship of the loudspeaker is indeed a factor worthy of our careful study. If the workmanship of the loudspeaker is rough, most of these are immature Products, the probability of quality problems is relatively high.

Fourth, whether the function of the amplifier meets the requirements, whether it supports U disk, TF card, FM radio, one-key loop function, etc.

Portable loudspeakers are small in size, with power between 3W-15W, and sound emission frequency range within 100 meters. The mainstream loudspeaker batteries on the market are lithium batteries, and old models of nickel light batteries and ordinary dry batteries have also appeared on the market.

1. When using the amplifier, avoid facing the microphone directly to the speaker, and adjust the volume appropriately and clearly, so as to avoid distortion and feedback howling.

2. Do not pull or tow the microphone wire during use, otherwise the poor contact between the wires will easily occur.

3. Do not overcharge or discharge the battery of the host for a long time. When the low battery is prompted, it should be charged in time. When not in use, pay attention to charge once every one to two months.

4. Handle gently during use.

Loudspeakers are small electrical products that need to be maintained to increase the service life of the loudspeaker.

1. Protect the microphone. The microphone is the most easily damaged accessory. The cable connector is often used. When we use the microphone, pay attention to it and do not use too much force.

2. Don't pull the microphone's wire forcibly, especially the part of the interface, it is easy to be damaged, usually pay attention not to move too much.

3. Maintenance of the battery. The battery must be fully charged before the first use, and then used again. Pay attention to the power during the use. If the sound becomes significantly weaker, we should charge it. If the battery is over-charged, it may be dry. Never charged. If you do not use it for a long time, you must charge it and save it. For example, if you have a summer vacation, forget to charge it. As a result, the battery naturally discharges after the vacation, and the battery is completely discharged. Save after charging, save on regular charge.

4. Pay attention to moisture resistance. The amplifier is an electrical product. If the humidity of the circuit board is too high, it will easily cause oxidation, so it should be stored in a dry place.

With the correct use of the above amplifiers, the service life of our amplifiers will generally be about 5 years. Generally, the microphone needs to be replaced one year because the microphone is relatively fragile. Of course, it is no problem to protect it for several years.