Many music lovers know the situation:loudspeaker, installed in one of the speakers, suddenly starts to "croak." The external inspection does not give anything, at "call-through" the tester shows the active resistance indicated on the label, but the sound irritates, sometimes leading to rabies. Especially such a malfunction is characteristic of low-frequency loudspeakers with a large working stroke. What's the matter?
In a conventional radio workshop, they will be advised simplyreplace the loudspeaker with a new one. This is the solution to the problem. It is simple, but expensive. A good powerful head, but also a brand-name one, can be bought, but it costs a lot. It always succeeds. In the meantime, you can try to repair the speaker yourself.
As a rule, rales caused byreproduction of the bass spectrum of sound frequencies are caused by short-term disruption of the contacts connecting the coil with the acoustic cable. In a place where thin, literally hair wires glued to the surface of the diffuser are connected to thicker elastic cables leading to the shoe, the fatigue of the metal tin gradually accumulates during the sound reproduction.
Repair the dynamics of the subwoofer, and he oftensuffers from this disease, is simple, but requires accuracy. Usually the junction is filled with a drop of compound, here it is necessary to pick it up very carefully, first preheating with a soldering iron. After the connection is exposed, the contact should be very carefully and quickly dispersed. After checking, if everything is in order, the repair site should be refilled with an insulating compound, nail polish or viscous glue.
Repair of the speaker may be necessary also in thosecases, when the restoration of vintage or antique radio equipment is being carried out, over half a century old. For example, someone got an old tube American receiver of the post-war years. The condition is quite working, but the diffuser is badly damaged. You can, of course, simply replace the loudspeaker with a similar modern one. But in fact it would be desirable to achieve "that" sounding, to feel time. In general, there is a desire to preserve as many original elements of the scheme as possible.
Repair of the speaker with broken or tornThe cone is made by sizing. The best material that serves to impose such a "patch" is the filter for the coffee machine. Scissors should cut out the patch in such a way that it corresponds to the shape of the missing fragment with an overlap of half a centimeter. Since the stiffness is a good quality of the diffuser, it is best to paste the restorative part with acrylic nail varnish. In the same place where its edge abuts the ring holder, the stiffness on the contrary is inappropriate, the stroke should be as free as possible, so it is recommended to restore the semicircular edge with rubber glue, like "eighty-eighth". We can assume that the repair of the speaker is over, it remains only to give the varnish and the glue to cure and polymerize.
Frequent malfunction of loudspeakers - wear and tearfailure of the corrugated ring suspension, made as a rule from porous rubber and holding the diffuser along the edge. The repair of the speaker in this case consists in removing the old one and gluing a new elastic ring. Sets for this procedure are sold, but it should be borne in mind that such painstaking restoration work deserves only expensive loudspeakers, it is not worthwhile to bother with cheap ones.
