Pointer multimeter - how to test if the loudspeaker is good or bad
Pointer multimeter dialled to the ohm file, and then the multimeter dialled to one ohm, random pointer multimeter, red pen, black pen short effect to zero, so that the measurement is accurate, the measurement of the horn does not need effect table, directly to the multimeter to one ohm, the pen casually ride to a horn positive, negative pole can be used casually touch the horn with the other pen to another pole, as long as you hear the sound of the clicking sound, proving that the horn is Good, on the contrary, no sound, prove that it is bad. The above is a pointer multimeter to judge the speaker good bad bad measurement method, judge the speaker is good or bad, with a pointer multimeter one ohm file, the best measurement.
Detection of the horn using the detection resistance file is, the horn is driven by the copper wire winding resistance coil, according to the impedance needs to be divided into 4 ohms, 8 ohms, etc., as long as the current through is good. This is the knowledge learned 55 years ago, when they assembled their own seven-tube transistor semiconductor radio, repair transistor TV. Now it's all integrated circuit chips, and the knowledge is updated, but the principles of the horn haven't changed much.
