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In Reply to: RE: Sansui SP-3005 project confusion posted by maxhifi on October 04, 2016 at 23:01:53
I can't help wondering whether the magnet has lost some strength, so the original design Qt could have been lower.
Follow Ups:
First Speaker:
Fs = 36.38
Qms = 2.93
Qes = 0.987
Qts = 0.738
Second Speaker:
Fs = 34.79
Qms = 2.86
Qes = 1.06
Qts = 0.77
Looks like they're not all that different from each other.
> I can't help wondering whether the magnet has lost some strength, so the original design Qt could have been lower.
Maybe, or maybe it just had a large coil gap, not unusual with inexpensive drivers. Also consider that depending on how old it might have pre-dated T/S specs, and if not it still pre-dated modeling software, or even the PC for that matter. I remember Sansui being very popular when I was in college, and I graduated in '71, when all speakers were product of empirical design.
I'm going to measure the other woofer tonight, and see how close they are to each other. You guys may have a point, there's definitely no sense in building enclosures if the speakers are shot.
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