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So I bought a new multi-meter and decided to check the resistance of all the drivers on my AR18. So far so good. All drivers (woofers and tweeters) showed a good 5 ohms. While I was at it I also checked the capacitors I replaced. Still good there. showed about 6uF. On a hunch, I checked the older capacitors which were still in the cabinet. While one showed 7uF the other showed a insane 18.5 uF. Now using the calculator http://www.carstereo.com/help/Articles.cfm?id=1 , I figured the hi pass as intended by the company would be 5300hz. But with the wonky capactor it would be 1766hz. Would that have damaged the tweeter in the past? Sorry for such a noob question! Here is the older thread on rebuilding them