At the risk of inciting a huge groan of protest about dredging this thread out of the dust bin ... again! ... my apologies.

Having read through all 7 pages, I am no closer to understanding what a current true drop in replacement is for the original 18 bit DSP5000 Silver voice coil/Silver dome tweeter? I have seen SEAS H539, H519, a black dome (not sure which model), etc...

Although I built a Hafler power amp kit back in college, I was a naive kid back then and kinda oblivious... Wizened by experiences since, I am already intimidated by the notion of what sounds like needing to solder in any replacement and overheating and melting a voice-coil in the process. I am definitely not interested in lathing off flange thickness, or routing, filing, or otherwise modifying the cabinet. I’d like a true drop in replacement. And if that is the OEM, where to get two in the USA since that seems to be an issue as well... Not sure that I saw that any of the “improvement” options was a drop-in, but if there is... Personally, I don’t care if something is a millimeter or two proud or shallow either.

I imagine those following me here into this wormhole would like such a definitive summary of the state of tweeter update/replacement/rejuvenation for legacy DSP speakers as of early 2018... so if one of the sage wise men would indulge us with a bit of their wisdom/time?

Thanks
-Scott