【 Weak current College 】 speaker system maintenance

The entire sound system speaker system is an important part of the value of up to about half of the total system shall be properly treated so.

① avoid direct exposure to sunlight is placed in the Sun, do not place close to the thermal radiation appliances such as stoves, radiators, are not placed in a humid place.

② speakers connected to the amplifier before cutting off the amplifier power, so as not to damage the speakers.

③ and amplifier feeder connections should be conservative in the subject when you can't pull off, positive and negative polarity can not be wrong. Connect the speakers of the feeder should be enough to rough, should not be too long, so as to avoid the loss and deterioration of the damping. To deviations from the frequency response of Max's 0.5dB (0.75mm2 conductor maximum length 9cm, 1.5mm2 conductor maximum length 14m, 2.0mm2 conductor maximum length 21m.

④ should note speaker impedance is the recommended value for amplifier

⑤ shall not exceed the rated power. Otherwise, the sound quality will be bad, or even damage the speakers.

⑥ shell should use a soft, dry cloth to clean, not coated furniture wax or benzene, alcohol substances.

⑦ surface dust only speakers with a soft brush cleared, you cannot use the vacuum cleaner ablution.

⑧ speakers to be placed on a solid, sturdy floor to avoid bass attenuation. Speakers don't stand too close to the wall.

⑨ do not place too close to the speaker by singing up, so as not to produce a whistling sound feedback caused.

⑩: provided, treble level adjustment, you can listen to make laugh for adjustment.

Speaker system failure analysis

Speaker system is an important part of the audio device, typically one of the speakers, divider, box, sound-absorbing materials, etc. Speaker system failure rate is low, the type of failure, malfunction has the following four categories.

First, the silent

1. the speaker wiringfault or divider exception. Speaker wiring faults, no excitation voltage loudspeaker unit, resulting in a silent failure. Divider General is not easy to break, but likely lead connector unsoldering, frequency capacitor short-circuit faults.

2. voice coil. Available multimeter R× 1 stall measure speakers lead wire welding sheet, if the resistance to ∞, available knife voice coil wire ends of the seal paint open, exposing the bare copper wire and then, if you still not understand, the voice coil inside the broken line; if there has been General and measuring "Titicaca" sound, voice coil wire circuit breaker, will head a good solder, then a separate paragraph and voice coil winding wire welding completed similar.

3. Speaker Wire breakage. The speaker cone vibration frequency, braided line easily broken, sometimes wire breaks, but cotton core wire remain connected. This braided cord is not easy to buy, you can use a slightly longer flexible conductor instead.

4. the voice coil burn. Multimeter R× 1 stall measure the resistance of the wire, if the speaker is close to 0 Ω, and no "Titicaca" sound, voice coil burn. Replace the voice coil before you clear the magnetic gap in the debris, then carefully placed in the new voice coil magnetic gap, strengthening the voice coil, audition with super glue fixed voice coil down position, the position to be the best voice coil placed, with Super Glue will voice coil and cone of gap filled to half, finally sealed the shield, the speaker cone up, place the day after normal use.

Second, with intermittent sound

1. Speaker wire. Usually the voice coil wire welding by fault or caused by poor, cone vibration frequency, breakpoints and connected, disconnected, the formation of irregular when no sound when the alarm.

2. voice coil wire breakage or upcoming short circuit.

3. the power amplifier output jack is bad or speaker input line break.

Third, the volume small

1. speaker performance bad, Alnico magnetic drop. Speaker sensitivity depends primarily on the permanent magnet magnetic, cone of quality and Assembly process. You can use the ferromagnetic objects touch AlNiCo, depending on the size of the attractive estimate Alnico magnetic intensity, if only the magnetic too weak, replace the speakers.

2. import core column loose. When the speaker's Guide core column loose, will be conducting magnetic Board suction head to one side so that the voice coil squeezed impeded normal voice. Maintenance free hand touch paper Bowl, if you press no, you may be allowed by stud voice coil, the need to remove and then reinstall the viscous to recovery.

3. the divider exception. When the divider is a symbol of bad, the corresponding frequency band signal is blocked, the band speakers volume small fault occurs. Should focus on checking and woofer frequency capacitor in parallel, and whether short and treble speakers in parallel frequency inductance coil is layer short.

4. abnormal voice

1. magnetic gap with debris. If you have a junk into the magnetic gap, voice coil vibration friction between is and sundries, causing the throat.

2. wipe the core voice coil. The location is not positive, voice coil and magnetic core rub rub occurred, resulting in the sound is distorted, repair or correction of the voice coil position should replace the voice coil.

3. paper trough rupture. Damaged area of the paper should be replaced, damage area small free a little thin paper basins or other toughness better paper patch.

4. in case of bad. Box sealing undesirable or decorative netting installation not in jail, etc., will cause a rupture during playback. In addition, the box too thin sheet lead to resonance, it will give rise to abnormal voice.