Curious if anyone has ever sourced parts for the Jensen Q4 tweeters? or know if a shop that can rebuild one? I have a pretty noticeable buzz in one of my pair. I've reconed speakers before and am familiar with the process. These Q4 units have a couple adjustments which allow for some realignment of the "spider" and "pole piece". This helped somewhat but the real issue is that the coil form has distorted. No amount repositioning will cure this. Has anyone run into this issue before?