Gentlemen, I have a 150 Hz tractrix horn mounted with a BC 8PL21 driver. The backchamber is suitably small I believe.
This is the impedance plot of the system:
I would like to have your opinion on this plot. The main peak is where I want it. However, there is a secondary resonance at 55 Hz that is a bit worrying. Can anybody explain this behavior?
Best
Kris
This is the impedance plot of the system:
An externally hosted image should be here but it was not working when we last tested it.
I would like to have your opinion on this plot. The main peak is where I want it. However, there is a secondary resonance at 55 Hz that is a bit worrying. Can anybody explain this behavior?
Best
Kris
SWAG - Horn Artifact
The resonance of the driver is probably broader than you syspect. It is the dip centered at about 85 Hz. that may be important. Suspect the affective (acoustical) length of you horn is about 40" or 1/4 wavelength for a 85 Hz. signal.
Regards,
WHG
Gentlemen, I have a 150 Hz tractrix horn mounted with a BC 8PL21 driver. The backchamber is suitably small I believe.
This is the impedance plot of the system:
An externally hosted image should be here but it was not working when we last tested it.
I would like to have your opinion on this plot. The main peak is where I want it. However, there is a secondary resonance at 55 Hz that is a bit worrying. Can anybody explain this behavior?
Best
Kris
The resonance of the driver is probably broader than you syspect. It is the dip centered at about 85 Hz. that may be important. Suspect the affective (acoustical) length of you horn is about 40" or 1/4 wavelength for a 85 Hz. signal.
Regards,
WHG
Last edited:
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