These Focal TC120tdx2s have always worked and sounded great.I just hooked them up with a crossover at 3khz and listened to them. Sound great, no issues. Easily the best tweeter Ive ever heard. Brilliantly clear and dynamic. These (or a variation of these) were used in some Wilson Watt & JM Lab Utopia speakers as well as GR Research kits. Please do your research to make sure they will work with your speakers or project. Both measured 6.5ohms. Matching serial numbers. Speaker tabs have never been soldered onto.I did not attempt to clean dust off of the cone, nor did I do any touch up to the drivers. Selling because I am settled on my AR3 speakers from the early 1960s. These Focal tweeters are sold as a pair. Will be properly packed up and double boxed (if not triple!). See my feedback. Enjoy I will be able to ship these after September 12th.