Change in ohms of bookshelf speakers

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Remove the resistor if you wish, but keep the jumper!
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.
 
Sounds like your DMM is interacting with a capacitor.

I don't view that as a problem with the speaker. I view that as a problem with the test setup.


Why are you attempting to measure the DC resistance of the speaker? What problem are you having with them?
 
What your speakers do is very natural and 100% has to be this way.
What is not natural and may do damage to your music system, is the multimeter you connect to it. Stop measuring with this toy and enjoy the music. If you are bored, go out and meet people.
 
If dmm is interacting with capasitor it should do on both speakers but why only one ?
possibly. It depends on test conditions and the quality of your DMM.

measuring DC resistance may not give you minimum impedance as speakers are a reactive load.

If the manufacturer claims they are 6 ohms, it is nominal rating across the operating frequency band and good enough for what you are attempting to do.

What is the output impedance of your amplifier?

Do the speakers work when you hook them up and play music?
 
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.
NO.
A shorted resistor is ZERO ohms and affects NOTHING.
If I drink an empty glass of wine, will it get me drunk?
Think about it.
 
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OP, post a x-over schematic, amp make and model, speaker make and model, DMM make and model and photos/procedures of/for testing.

Having done what I think you're doing, I've gotten similar results, all due to charging up a capacitor. Could also be measuring an odd artifact of impedance (not resistance, speakers are a reactive load) due to the sampling rate of the DMM (depending on the DMM design).
 
Just curious, are you measuring speakers while still connected to amp output?
Because Multimeters do not actually measure ohms but a small voltage 😱
Offset voltage will be read and displayed as if it were a given ohms value.
20 to 40 "ohms" value sounds suspiciously similar to 20 to 40 mV offset, very common values.
 
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