Looking at Zaph's 5.5" and 6.5" midwoofer infinite baffle FR measurements, I found something strange. In his FR plots, most of 5.5" drivers' bass roll off begins little over 100 Hz. But most of 6.5" drivers' bass roll off starts at as high as 250 - 300 Hz. This seems counter-intuitive to me. 6.5" drivers should have stronger bass that 5.5", don't they?
Zaph mentioned that he didn't use indentical settings to measure these groups of drivers. For example he said that he did not merge near field measuremnt for his 6.5" measurements. Is this the reason for different bass roll off behaviors? Then which of his measurement data (5.5" versus 6.5") show more accurate bass response on an infinite baffle?
Zaph mentioned that he didn't use indentical settings to measure these groups of drivers. For example he said that he did not merge near field measuremnt for his 6.5" measurements. Is this the reason for different bass roll off behaviors? Then which of his measurement data (5.5" versus 6.5") show more accurate bass response on an infinite baffle?
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