I bought my first pair of ADS 910 speakers in 1978. I still have them, although they need to be restored. I still own pairs of 1590/2's, a pair of 1290's, and a pair of 810's. The latter three pairs still sound great.
In my opinion, the classic "fried-egg" mid-range driver used in those ADS speakers is still one of the best mid-range drivers ever designed.