design and measurement of speaker

[dick van nierop]

Hi guys,

A while ago I got a new interest in designing speakers. My first project was a small two way speaker I built for a friend of mine. I documented it on my website home.hccnet.nl/ine.dick

The site describes the measurement of T/S parameters, the change in the parameters while breaking in the woofer, the design and measurements of the box, acoustic measurements, the design and measurment of the cross over and the measurements on the final box.

Dick van Nierop.

 

[Ron E]

This is the best description of a loudspeaker design process that I have seen on the internet. The crossover work is especially good. Many hobbyists will be better off for your excellent efforts. Thank you for sharing!!

 

[cocolino]

Indeed truely excellent!!
Particular I like that You cared so much about break-in of the drivers - many underestimate how much driver parameters of new drivers can change after a break-in.
BTW: how did You measure DC-resistance of the voice coil for calculation of T/S-parameters?
Take care that ordinary multimeters are not very suitable for high accuracy measurements in the low resistance ranges. They can easily introduce 10-20% of error.
I`m always using a Milliohmmeter in 4-wire configuration (Kelvin-sensing) for that purpose.

 

[dick van nierop]

Cocolino,

I measured DC resistance with a multimeter and checked with productdata and data obtained with Speakerworkshop. Though the soundcard can't measure DC the impedance measurements can be extrapolated and can thus give a fairly good estimate of DC resistance.

Dick.

 

[dieringe]

site design

i am shure you could have done without javascript
and with the text fitting into the windows.

nobody needs and wants an extra window popping up.

 

[FrankDIY]

Very nice description and project!! I like your design approach