Speaker Port Resonance

[AnthonyLoFi]

Hi All,
I have read the REW help document and did a quick search here but...my question is..
Can REW measure the resonance produced by the ports of a ported speaker?

The manufacturer (Tannoy) doesn't have any publicly available specifications.
I believe I can measure my crossover frequencies and determine impedance values but cant see how I could use REW to indicate how many and to what value speaker port resonances.

There are theoretical calculations which could help but would rather measure if possible.
Thanks in advance.

 

[sm52]

If you measure speaker impedance with REW, you'll see.

 

[sam_adams]

Measure the acoustic port response nearfield. Place the mic flush with the front baffle of the speaker centered on the port. Your sweep range can be 20 - 20,000 Hz. Make sure that you choose a sweep level that is not too high since the mic is very close to the source and the output will be very high. If you have a way to calibrate the amp output and signal sweep level to get 2.83 Vrms into 8 Ω, you will be able test with consistency and measurement comparisons will make more sense. Port measurements made this way will reveal the port resonances, port turbulence noises, and leakage through the port from other drivers.

An example with a small subwoofer:

 

[AnthonyLoFi]

Thanks Sam and SM52, really appreciate your help.