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In the Forum: Audio For Dummies ™
In the Thread: Goto SG-370DX measurement
Post Subject: Almost got them allPosted by martinshorn on: 3/28/2018
Actually.... searching very hard the web, you can find this:
SG370 dia from inside: http://tempuri.org/tempuri.html - Measures you just provided SG146 Measures were here already (just questionable reliability) : http://tempuri.org/tempuri.html
SG505 response + impedance even...: http://tempuri.org/tempuri.html - now that is interesting, as the 505 is supposed to go as low as 100, at least in small horns till 300 for full power, you see hes already below 600 out of his comfort zone 
SG160 : http://tempuri.org/tempuri.html
Now, that so far confirms dont listen but measure, coz they all sound amazing and measure like ...... dont want to say it even Rerurn to Romy the Cat's Site