I have a pair of SDA 1s that are very nice. This is the 2nd pair of SDAs I have tried in 15 years. i just cannot do it. I have late RTA12Bs that to me (and others who have listened) sound more defined and have more depth or a more forward sound. The SDAs sound good but the stage is from the grills back and not as sharply defined and the sound is slightly soft. There is nothing wrong with them and I am hearing the same thing reviewers of the time mentioned in pro reviews.
Here is the question What if i wired the 2 mid drivers together ( i know they are slightly different) and the two tweeters ( they did this on the later ones anyway) and ran them and positioned them as conventional speakers? Has anyone done this? I know people have but never thought to ask what it sounds like. thanks,keith