led display waterproof frets

led display waterproof frets, Shenzhen City Cable think Wanji Albert Electronics Co., Ltd. Brand Products Although any led display waterproof column loudspeaker has its strengths and weaknesses, especially in the limited budget, the speaker will not be easy and cheap get perfect results, but whatever the price and level of speakers is concerned, there is a certain reference standard or referent direction. A: IF test is the most vocal voices heard voices, the pros and cons is not difficult to detect, voice note whether there are unusual or ineffectively nasal sound feeling. Some speakers "sound box" will also greatly interfere with frequency, so that the sound of this band is blurred. IF bass with more serious in terms of bass frequencies to the other, because most of the audible sound frequency or frequencies of music are concentrated in the mid range, this is almost all kinds of music, it will become a replay obstacles. B: test led display low-quality low-quality low-frequency waterproof column loudspeaker arising boom may be deaf ear if, but totally the kind of bloated bulky, lack of layering and strong feeling. Good low-frequency should be clean and neat, structured, not dragging its feet, like innocent people to leave, even if the size of the various low-frequency instruments such as drums, bass guitar and piano, bass, can easily tell the difference. So do not easily feel deceived by the amount of low-frequency, low-quality low-frequency sounds better to clean natural and comfortable. C: high volume and sound field test knot like some led display waterproof column loudspeaker during low volume was stable, but in volume to an index will be distorted, or "are shot", a variety of non-recording of music signal (of course in 12:00, but the volume of safety testing standards). Specifically, when the orchestra is one of the favorite types of music, you must pass this off. In line with standard speakers do sound a certain extent from the tank, creating a clear sound field and knot image, showing the location of points of different instruments and texture, as well as ample diffusion growth, wide, high, but the degree of audio space. Mute and tail should be heard clearly, and in large volume and the "big bursting" without distortion distortion, vocal and instrumental sound not dwell regardless. The quality of the replay can show rich musicality and sense of air, jumping ability and musical notes, like the clouds are cleared to see the same blue sky, showing the whole audiovisual meticulous and orderly. And more directly in the next it will not cause long-term listening ear fatigue. D: poor sense of flexibility is shrill high-frequency high-frequency test plug our ears, hear people splitting headache, extreme cases, violin or bel canto soprano becomes sharp brake noise. Similarly, led display different textures waterproof frets treble different instrumental produce more good tweeter is able to tell the difference. Then the merits of a high-frequency and can even distinguish cause from two different years by different wooden play the different phonology. The most easy to grasp to be decided is good cause for the treble is not back to listen and intimidating, the pores erected, it will not cause heard the tired, but that is soft and flexible and tough, with a smooth and level, up to the highest point is still easy to hear but does not produce change in tone is certainly not out of tune singer recording reference. According to the occasion and requires the use of sound, combined with the characteristics of species speakers to select the speaker. For example, voice-based outdoor broadcasting, the choice of a tubular electric speakers, such as higher quality, should be the choice of electric-powered loudspeaker boxes or fret: indoor general broadcasting, the menu can be made only small electric cone speaker Speaker: And to listen to music or for quality will be the main speaker PA, should be chosen by a high, subwoofer speaker combination boxes. The use of the speaker and the corresponding note the following: (1) led display waterproof column loudspeaker obtained power not exceed its rated power, otherwise it will burn the voice coil, or coil vibrating loose. Electromagnetic and piezoelectric ceramic speaker operating voltage not exceeding 30v. (2) Note that Yang led display waterproof frets acoustic impedance of the output line should fit the specific approach can be found in a megaphone. (3) to select the correct speaker models. As the use of the square should be used tweeters; indoor use, should use cone speakers, and help choose the right speakers. Can also be high, subwoofer speaker group so successful, to extend the frequency response range. (4) In the arrangement of the speaker when the speaker to achieve uniform sound and sufficient sound level, as with single (point) can not meet the needs of the speakers, can be more settings to get almost every audience loudness, raised his voice clarity; there is a good sense of direction, the speaker should be installed three meters above the ground, so that the audience can "; see"; to the speaker, and try to make the horizontal position of the auditory (sound source) a visual (speaker) to try consistent, and the distance between the two speakers can not be too large. (5) Power type speaker, must sound the horn caps must not use, it will be very easy to damage the pronunciation head. (6) Two people with loudspeakers used together, we must pay attention to the phase problem. If it is inverted, the sound will be significantly weakened. The easiest method for determining the phase of the speaker using a high sensitivity meter or multimeter 50 ~ 250ma current block, the test table and the speaker terminals are connected, hands held onto the cone, the force pushing it, then you can swing from the hands of to determine the direction of their phase. As the same phase, hands swinging in one direction. Then you can put the voice coil is connected to the positive lead of lead head as "; ten"; level. Annex: led display waterproof frets type speaker sound film installation tips. led display waterproof speaker sound pillar still widely used in a number of rural and urban market, and once type speaker loss of sound film, sound film to ensure proper installation position following describes a method capable of more easily to solve this problem. Installation can be done in two steps. First, select the appropriate thickness of the paper, cut the two loose ~ 10mm, diameter larger than the center piece of paper length of 20mm. Then two strips vertically on the center of each piece (in the position to take). In order to prevent them from moving, can one o'clock paste them stick. Both ends of the strip is inserted into the magnetic gap. The sound of the voice coil alignment of the magnetic gap film, gently press down. Because of the note, then the voice coil location right in the middle of the magnetic gap, and not skewed. On the edge of the measured sound film coated with adhesive, and to cover the sound head cover. Alignment holes, and tighten the screw. And covered with the relative position of the head in place sound good on record. Place 8 hours, until the all-purpose adhesive is completely dry, you can unscrew the screws and remove the cover. In this case, sound film has been glued to the cover up. led display waterproof frets second step, lead solder on the terminals. Remove the two strips, then put the cover back cover, pay attention to the alignment mark originally made. Then multimeter r × block or 1.5v batteries, while constantly touching two terminals, a "; Titicaca"; sound while tapping the cover, to "; Titicaca"; the sound of the greatest, and there is no friction sound time, you can gradually tighten the screws. When tighten the screws, should be symmetrical to tighten the rotation, and should not be a screw screwed tight, second only to tighten the screws again.