Greetings -Originally Posted by ditusa
The mass ring serves to increase the total mechanical mass of the cone assembly, thereby lowering the free air resonance ( fs ) of the woofer. By removing the ring you essentially have your speaker in an enclosure that is not tuned to the speaker. The difference in fs between having the ring or not, could be as much as 20 Hz.
JBL saw fit to use the ring to lower the fs rather than using a heavy cone. Another trick JBL used to lower the FS would be the difference between the D123 and 123A, was buy coating the 123A with that white crap.
Does removing the mass ring make the speaker sound better? The question should be; Does a misaligned speaker enclosure sound good?
Just sayin'...
HF
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