Spendor D9, those are really special speakers imho, they are the « sleeper car « pair between the 3... often forgotten. Very quick and snappy, pratty drivers. EP77 cone material makes for a very natural midrange, a bit like Harbeth but without the thin wall resonating casing. Very nice soft dome tweeter also that has proven to be a musical, reliable winner for Spendor all these years. ( made from SEAS I believe)
Yes; nice summary.
I replaced my Magico S1 mk1s with the D9s, and am very happy with the D9s. The A3 will definitely be an interesting speaker to compare with them instead of the smaller S1.
I could be wrong, but I thought Spendor manufactures the LPZ tweeter. Either way, it is a nice tweeter. I don't find it quite as quick or detailed as the tweeter in the S1, but it still has plenty of detail and snap without getting in your face. The mid-range really pulls you in and the very solid bass and high frequencies integrate very well.