Testing Tonsil GD IO (16/4/3) 15 Ohm: How to use a multimeter & verify speaker functionality

Hello
As in the subject. I found some nice speakers but I don't know if they work and I don't know how to check it. Knowing life, you have to pick up a meter .. and here a problem arises, because I don't even know how to use the meter. At the rear, the speakers have + and - and two super short wires. The only things I can read from the speakers are:
Tonsil
GD IO (?) 16/4/3
15Ohm
Quibeer License

I will only point out that these are not square speakers, but how to say ... their interior. So this "egg-shaped" part with a circle inside. Just a loudspeaker without a housing
Please help me diagnose and operate the meter.
Regards!

The easiest way to check the speakers is by connecting them to some amplifier, the meter will not help you here.

Switch the meter to resistance measurement - ?, to its lowest range.
the result should be around 3-9 ?, take into account the resistance of the cables, i.e. shorten 2 cables first, read the measurement (it can be around 2 ? and measure the speaker - it doesn't matter. (the result of 7? or 7? - 2? for the cables will be 5? ;)

This is one test. The second is a 9V battery, short the battery contacts with the speaker contacts for a fraction of a second. It should "knock" during this process. Do not hold the batteries on the contacts.

These 2 tests above will not give an unequivocal result, they are the first test worth doing on a loudspeaker. It only reflects the state of the coil (not burnt) and that the speaker is not seized (diaphragm is moving).

Finally, it is worth carrying out a listening test, that is, connect it to the amplifier and listen to whether it is walking and how it is going, or not, for example, whirring.

The meter is for the lowest resistance range and check that the meter is 15 ? (plus or minus about 1 ?, also depends on the class of the meter)

The method with a battery can also be used, but it is better to use one 1.5V "finger" battery

The best way is to check it on the amplifier or on the tower.

Damian R. wrote:

The meter is for the lowest resistance range and check that the meter is 15 ? (plus or minus about 1 ?, also depends on the class of the meter)

It doesn't have to be 15 ?. It may be more or less.