On the U.S Speaker website, the part number is a PHT-8RD. It sells for $15.99
On the same website a new tweeter is $51.59
Foster and P-Audio use the same diaphragm.
Just about every bass cab manufacturer uses THIS SAME tweeter, from Ampeg to Bergantino, Epifani to GK. Avatar uses the Foster version. Same = Same = Same.
It's not a bad idea to have a spare diaphragm on hand, replacing them usually can be done under an hour.
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