The importance of Kms(X) and BL(x) for mid-ranges

[TNT]

Irisbo liked the post containing:

"If the summing mechanism is perfectly linear, there should be no IM - right!? "

So I assume he find the statement correct.

//

 

[lrisbo]

yes

 

[camplo]

That is true. The separator is that the concern of loudspeakers , it’s input vs output.

 

[DualTriode]

Hello All,

Sitting here on my bench is a GRAS 46B-1 1/4 inch microphone.

A fun fact, microphones are calibrated in SPL per Pascal. Microphones are pressure sensors.

A driver in a sealed enclosure operates with with the additional stiffness of air suspension. The air pressure can be measured with a in box microphone. All of this is knowable and measurable. The in box air pressure will effect the position of the voice coil in the motor flux field.

Now I am visualizing what will happen to the in box air pressure in a enclosure fitted with a passive radiator. An interesting thing is that the PR will have a much longer excursion than the the driver Voice Coil. The in box air pressure will modulate differently than in a sealed enclosure speaker.

Thanks DT

I will make some measurements with the sealed box. Impedance, Frequency Response sweeps, HD and IMD. Thoughts?

Later with the Passive Radiator.

 

[b_force]

Thoughts?

yes, putting it in a new different topic, thank you 🙂