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I am not sure what the differnce is between these tube. I purchased both types but can not distinguish any structural differences. I have heard the four bar version is rare and sonically superior to the two bar version. Are there any Mazda experts out there that can help on this one? Bart
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Topic - Mazda 12AX7 2 bar vs 4 bar what is the difference? - posbwp55@msn.com 21:56:17 10/29/06 (0)