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ML-TL question: Meaning of dip at "Woofer and Terminus  Far Field SPL"
ML-TL question: Meaning of dip at "Woofer and Terminus  Far Field SPL"
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Old 13th February 2004, 08:02 PM   #1
JC Fardo is offline JC Fardo  Brazil
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Default ML-TL question: Meaning of dip at "Woofer and Terminus Far Field SPL"

HI

Im 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 dont know if this result is fine.

Thanks in advance for comments.

JC
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Old 13th February 2004, 10:49 PM   #2
Timn8ter is offline Timn8ter  United States
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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
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Old 14th February 2004, 01:10 PM   #3
JC Fardo is offline JC Fardo  Brazil
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Hi Tinm8ter

Thanks for reply.

In impendance graphic first peak is at 35Hz

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

TIA
JC
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Old 14th February 2004, 01:20 PM   #4
JC Fardo is offline JC Fardo  Brazil
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Hi Timn8ter

Sorry. The answer is on the thread you have post

BTW nice page yours

TIA, JC
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