Some Spendor A7 I’ve heard in another system though were really promising:: beautiful mids without a trace of a BBC dip as far as I could tell, silky and lively highs albeit a bit too pronounced, very nice upper bass detail, good timbre reproduction, good scale and bass extension considering their dimensions but ultimately trying too hard to descend where that 7 inch driver shouldn’t. This or it was the amplifier - a rather cheap Atoll I’ve never heard before or after so an unknown factor for me.
I owned A7’s for the past year and this is a great summary of their sound profile. I had them paired with a Line Magnetic 805ia SET amp. No slouch by any measure. What you heard re. trying to reach too deep, was one of the few issues I had with them. There was a lot of bass but the bottom did get congested/messy.
If I were to move on from my electrostats, which I might eventually, I could live with some hypothetical improved A7’s with better bass extension, a bit better scale and, of course, higher resolution overall.
They are called the D7.2’s and are now what I own. They improve upon the A7’s in exactly those 3 categories. Bottom end of bass has better extension, clarity, and articulation. The LPZ tweeter has much better resolution and clarity. Though some would say too much - and this is where pairing with electronics becomes crucial for the D7’s. I have them running off of the 4 ohm tap on my LM 805ia and they sound absolutely fantastic and almost perfectly balanced. It’s really hard for me to find fault with them at the moment.
All that said, they are simply not the same kind of sounding speaker as the Classics/SP1's or Devore's.