Shenzhen AP-9040 Active waterproof frets

Shenzhen Hong Mei Electronics Technology Co., Ltd. developed the production of sound for 2 years of free maintenance, five-year warranty and lifetime maintenance. A detailed description of the active waterproof frets AP-9040 active manufacturers big promotion ACE luxury waterproof frets: AP-9040 series Function :: 1, dual-channel input, unbalanced signal, and a volume control; flexible connection port easy to use; 2, DC12V or AC220V power supply; (optional power saving mode) 3, reasonable structure, beautiful, wall-mounted; 4, built-in hi-fi hi-fi level high and low frequency speakers, hi-fi stereo , professional sound; 5, built purely digital amplifier circuit, imported original IC, efficient performance, low distortion, low loss; 6, ideal for school multimedia classrooms, conference rooms, training rooms, hotels, and other places background music; 7 digital amplifier board, CD-quality audio, low power consumption, low heat, high life. Active waterproof frets AP-9040 series: Model MODEL: AP-9040 - AP-9047 Rated Power W: 20W 30W 40W 60W 80W 100W 120W Maximum Power W: 20W 30W 40W 60W 80W 100W 120W Line-MV: 4.7k ohms (Ω) 330mV, unbalanced Frequency Response Hz: 70 Hz ~ 20k Hz (± 1 dB) nonlinear distortion THD: <0.05% at 1kHz, rated output power signal noise 1/3 ratio S / N:> 98dB Damping factor: 200 voltage rise rate: 1V / uS Function Interface: Line input, volume control, power switch; built-in speaker size: 6 "* 1 + 1" * 1 Protection FUSE: AC FUSE × T1.5A × 1 Power cord: (2 × 0.75mm2) × 1.5M (standard) Power supply: DV12 // AC 220V ± 10% 50-60Hz Power consumption: 15W-30W Mounting: Wall-mounted decorative materials: ABS shell Color: WHITE Dimensions MM: 275 * 182 * 120mm Weight KG: 1.38Kg - 3.98Kg knowledge necessary small speaker speaker works: electric-powered loudspeaker, also known as a dynamic speaker; it is the application of the principles of electro-acoustic electric transducer device; it is currently the largest use The most widely speakers, there are three main reasons: 1. Simple electric loudspeaker structure, easy production, and itself does not require a large space, resulting in cheaper price, you can a lot of popularity. 2. Such speaker may be done excellent performance can be obtained even in the band frequency response. 3. Such a speaker in continuous improvement, the speaker history for decades, is the speaker design, technology, materials and constantly improve the history, but also the times performance history. Electric-powered loudspeaker mostly tapered shape, dome-shaped; cone speaker (cone speaker) structure. Speaker cone structure can be divided into three parts: 1> vibration system includes a diaphragm, a voice coil, dampers, dust cover, etc. 2> magnetic system includes magnetic boards, magnetic column, magnetic next boards, magnets, etc. 3> auxiliary systems including frames, caulking, wire rack, phase tampon. According to Faraday's law, when a current-carrying conductor through a magnetic field, an electric power will be in a direction in line with Fleming's left-hand rule, the force of the current, the magnetic field direction perpendicular to each other, the force of the current size, wire length, the magnetic flux density into proportional. When the voice coil audio input alternating current, the coil by an alternating drivers alternating movement, led cone vibration, repeatedly pushing air and sound. The electric loudspeaker diaphragm vibration generating force, namely the force of the magnetic field of a current carrying conductor, this effect we call electric force transducer effect, the size specified by the following formula: F = BL i formula are: B is the magnetic induction of the magnetic gap density (intensity), the unit of N / (Am) , also known as Tesla (T) L is the length of the coil wire of the unit: m i is the current flowing through the coil unit: Ampere force F is the magnetic field of the coil, the unit: Newton, however, the coil is energized force in motion at the same time, due to the magnetic gap will be cut so that the magnetic field lines in the voice coil within an induced electromotive force, the effect we call electric transducer electrical effects, the size of its EMF is: е = Вiν where: v is the voice coil vibration velocity in units of: m / s е to electromotive force induced in the coil, the unit is: Volt electric loudspeaker force effect and electric effect is the line exist, accompanied. Shenzhen, Hong Mei Audio Electronics Co., Ltd. is a research and development, manufacturing, sales, "professional stage audio, digital audio sound, public address systems, active waterproof frets horn speakers, AV home theater, multimedia audio active, multimedia professional stage active sound and professional outdoor mobile sound "as one of the high-tech enterprises, the China Audio Industry Association and China Enterprise grade credit unit, has won China recognized brand names, Chinese audio brand, Shenzhen brand and other authoritative honorary title, Production of deep Combibloc audio brand products enjoy a high reputation in both domestic and foreign markets, selling products in many countries and regions.