Those look so bad parameters that I can't help feeling something must be wrong. Would you be prepared to try another measurement method?
richie00boy said:
I'll try anything at the moment. My SW setup does seem to be accurate though, measurements on other drivers do correspond pretty well to published datasheets...
Additional info- that is measured with the coils in series to give a 4Ohm load, the souncard doesn't seem to like driving 2ohm loads. When I get home, I might try using a power amp to buffer the signal to a few watts
How hard are you driving these? I normally take drivers to mechanical excursion limits to really stretch out the surround and spider. Being a large driver it might take longer than usual possibly.
Also, it's such a large driver so are you able to hold it up vertically with good clearance around for measusuring? You might get consistently bad readings if this was done motor down on a table...
It was clamped in an open door frame for testing, I don't have a fancy jig like yours! 🙂
As I said above, I've put this to one side for the moment to try and decrease the pile of half finished projects littering my workshop. I suspect that longer running in may well be the answer, the only problem is I can't do anything else whilst I'm doing it.
As I said above, I've put this to one side for the moment to try and decrease the pile of half finished projects littering my workshop. I suspect that longer running in may well be the answer, the only problem is I can't do anything else whilst I'm doing it.
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