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-   -   ML-TL question: Meaning of dip at "Woofer and Terminus Far Field SPL" (http://www.diyaudio.com/forums/multi-way/28171-ml-tl-question-meaning-dip-woofer-terminus-far-field-spl.html)

JC Fardo 13th February 2004 08:02 PM

ML-TL question: Meaning of dip at "Woofer and Terminus Far Field SPL"
 
HI

Iīm playing with MathCad 8 free demo. Enclosure is similar to Ariels but with MT Vifa PL18 configuration. Infinite Baffle SPL is nice with gradual rolloff.

Driver measured Fs: 38Hz, dip is at at 35HZ. Also first peak from Acoustic Impedance graphic is at 35Hz, and I really donīt know if this result is fine.

Thanks in advance for comments.

JC

Timn8ter 13th February 2004 10:49 PM

I believe the dip conicides with the impedance rise of the driver. This is normal. What you want to be concerned with are the ripples higher up. Here's a thread with MJKs explanations.
http://www.diyaudio.com/forums/showt...threadid=25388

JC Fardo 14th February 2004 01:10 PM

Hi Tinm8ter

Thanks for reply.

In impendance graphic first peak is at 35Hz

Driver Fs is 38Hz so itīs 3Hz lower. Any problem?

TIA
JC

JC Fardo 14th February 2004 01:20 PM

Hi Timn8ter

Sorry. The answer is on the thread you have post

BTW nice page yours

TIA, JC


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