If that was in Kamranbits' preceding thread, I don't think you were quite as subtle as I was! 😀
However, I do share your frustration with Kamranbits' modus operandi.
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Definitely.
But DCR is very close to minimum impedance or "impedance dip", typically between 250 and 400 Hz.
But DCR is very close to minimum impedance or "impedance dip", typically between 250 and 400 Hz.
No first i disconnect it from amplifier then measure it
Moreover if I was doing something wrong the other speakers ohms too should fluctuate but only this one goes 20-30ohms other stays always 6ohms
So bridging the resistor means it has no use in circuit just dummy nothing to do with ohms, frequency curves ect ect ?
But is it final solution because
Visually the capasitor doesn't show signs of failing, nor the Audio quality getting changed,nor we are sure that it is the culprit
If we were sure 100% the capasitor was bad ther was no issue but we are not
Ai
the resistor might still have a purpose. When one leg of the resistor is connected to the capacitor and the other leg is connected to the tweeter, and a wire is bridging both legs, it might form a specific impedance network or alter the crossover slope, affecting the frequency response of the tweeter. This configuration could be part of a particular crossover design to fine-tune the audio frequencies sent to the tweeter
But "@Galu" it's bilge
So again in confusion regarding the purpose of resistor in my circuit
the resistor might still have a purpose. When one leg of the resistor is connected to the capacitor and the other leg is connected to the tweeter, and a wire is bridging both legs, it might form a specific impedance network or alter the crossover slope, affecting the frequency response of the tweeter. This configuration could be part of a particular crossover design to fine-tune the audio frequencies sent to the tweeter
But "@Galu" it's bilge
So again in confusion regarding the purpose of resistor in my circuit
so resistor is just thrown in by manufacturer and bridge
And has no effect on audio it's 0 ohms
So now why does my ohms change
I don't think capasitor might be a culprit, resistor doesn't have anything in circuit.
What else is the issue?
And has no effect on audio it's 0 ohms
So now why does my ohms change
I don't think capasitor might be a culprit, resistor doesn't have anything in circuit.
What else is the issue?
If one speaker suddenly changed by such an amount you would most certainly know about it while listening. The sound level would drop to almost nothing across a huge part of the audio frequency band and yet you go on to say...
And:
So we assume nothing audible happens. That in itself is proof to me that the impedance is not suddenly wildly changing.
What you describe is quite likely to be something as simple as a poor interface between test meter, the leads and the speaker. It is a common scenario.
And any how I will close the speaker now using glue for more rigidity or else it will keep on vibratin
Now should I replace that capasitor which film 2.2uf 100v
Or just keep the old one
What do you suggest?
Yes, replace the cap in both speakers and leave the resistors and wires in place.
Hugo
Hugo
That's true. For example, I've just checked the resistance of a pair of nominal 8-ohm speakers, and I get 4.2/4.3 ohms - which seems about right.
Or residual charge, voice coil magnetism, multimeter interface, poor contacts/joints, some combination... I think you should replace the capacitors, reflow all solder joints, clean and check all contacts, and see how it goes. If that doesn't fix it, then there could be a problem with a driver. But there's nothing you can really do about that other than replace it, and I don't see any need to do that until you start to hear a problem.
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