Mesure box losses

REALFLEO · 6th February 2007, 11:06 PM

Hi everybody,

I builded a prototype of my vented 2way loudspeaker and want to mesure box losses. The book loudspeaker cookbook suggest to generate a impedance curve. Should I generate this curve with both the tweeter and driver connected ?

Can I use this technique like I did when testing my driver:
http://sound.westhost.com/tsp.htm

Also, do you have suggestion of sites explaining a good technique to produce a frequency response curve with a mic ?

Thanks,

REALFLEO

Ron E · 7th February 2007, 12:01 AM

It is best to measure driver impedance without a crossover connected, whether you are measuring free air or in a box.

I don't remember the formulas for loss offhand, it is in the LDC, but a measurement of impedance at a few key frequencies should be sufficient and any measurement of impedance should work.

REALFLEO · 7th February 2007, 01:06 AM

Are you saying that I should produce a impedance curve with just the driver directly connected ?

6th February 2007, 11:06 PM	#1
REALFLEO diyAudio Member Join Date: Nov 2006	Mesure box losses Hi everybody, I builded a prototype of my vented 2way loudspeaker and want to mesure box losses. The book loudspeaker cookbook suggest to generate a impedance curve. Should I generate this curve with both the tweeter and driver connected ? Can I use this technique like I did when testing my driver: http://sound.westhost.com/tsp.htm Also, do you have suggestion of sites explaining a good technique to produce a frequency response curve with a mic ? Thanks, REALFLEO

7th February 2007, 12:01 AM	#2
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	It is best to measure driver impedance without a crossover connected, whether you are measuring free air or in a box. I don't remember the formulas for loss offhand, it is in the LDC, but a measurement of impedance at a few key frequencies should be sufficient and any measurement of impedance should work. __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

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7th February 2007, 01:06 AM	#3
REALFLEO diyAudio Member Join Date: Nov 2006	Are you saying that I should produce a impedance curve with just the driver directly connected ?

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