Get in touch with Harbeth directly. I have done that in the past and they are very helpful!
Replacing tweeter in Harbeth SHL5 Plus
Since I’m not using my Harbeth SHL5 plus speakers all that much I thought I’d put them up for sale. When I started to pack them I noticed that my son must have poked a finger into one of the tweeters. It is a very small dent and I don’t hear any degradation in sound. But I still went ahead and ordered a new tweeter from a Harbeth dealer. When trying to replace it, the connection with the exiting tweeter is pretty tight and won’t come off easily. I don’t want to wrestle with it too much and make matters worse. Before I try other things im trying to figure out if the connecting wires are typically soldered together or can I wiggle and disconnect them.
if anyone has replaced a tweeter on SHL5+ or something similar, please let me know. Much appreciated.