Resonance frequency

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#5
I'd use the frequency of at the peak on the impedance graph, which appears to be 18Hz, unless anyone can think of a technical reason to go for the other. Does it make much difference to the box size & tuning? I doubt that it would, there's no need to get response below the low 30s anyway.
 
#7
And then be prepared for some other value. Maybe Eton is reliable, but a lot of what is available to DIYers is substandard product that failed QC and went out a side door, not to OEM buyers. That's why I settled on Scanspeak back in the 80s when I got tired of Audax and SEAS and Morel drivers measuring nearly x2 for fs. Not to mention Becker or CTS or Pyle or Peerless etc.
 
#8
phivates said:
And then be prepared for some other value. Maybe Eton is reliable, but a lot of what is available to DIYers is substandard product that failed QC and went out a side door, not to OEM buyers. That's why I settled on Scanspeak back in the 80s when I got tired of Audax and SEAS and Morel drivers measuring nearly x2 for fs. Not to mention Becker or CTS or Pyle or Peerless etc.
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+1
 
#10
The 23 Hz TSP I assume is short for Thiele Small Parameters. i wonder if it is a calculated number based on the specified compliance and effective mass? Or they want you to use that value for Ts calculations. otherwise I agree that the measured resonance is 18 Hz.

David
 
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