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Old 5th September 2009, 08:45 AM  
gainphile is offline gainphile  Australia
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Join Date: Dec 2007
Location: Melbourne the sunny city!
Default Measurements

I managed to do measurements today. Bit windy, in fact I found out that both the Seas and HiVi K1 can be dropped safely from 2m

This is a compilation of ungated, unsmoothed on and off-axis response. My yard is about 10m from the nearest wall, but I was able to raise the speaker about 2m high.

Click the image to open in full size.

Aside from the expected -6db drop and dipole peak at about 500-600hz, the directivity narrows from 600-1.5khz, but then it actually widens. After which things fall apart at 2.5kHz. This is great because I cross at 1.5kHz.

Compiling the data further, we can see on and off-axis response is very smooth at until 2.5kHz. There is a minor appearance of peak at the extreme off-axis measurement at around 1.2khz. Note that this is differential graph, not absolute spl.

Click the image to open in full size.

It may help to explain my observation why the sound is similiar to the previous build (S9).
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