I was underwhelmed by the A25. I had a first series pair- ScanDyna labeled, with a port ON TOP rather than the usual bottom location.
I thought bass was fine, but treble was very recessed. Looking at the curves for the new version, and reading reviews from back in the day that also included FR curves gives some insight into the design. Henry Kloss once said that lack of extreme FR extension can be managed if both extremes roll off smoothly and both rolloffs are balanced. The A25 had great deep bass, but started to rolloff below 100hz. Treble would extend to about 15khz, but only on axis, and would fall off noticeably off axis at 10khz. In typical listening rooms, with typical early SS equipment this was a great match. And efficiency was slighlty better than the AR4 meaning it could play louder and cleaner with a modestly powered receiver.
I thought bass was fine, but treble was very recessed. Looking at the curves for the new version, and reading reviews from back in the day that also included FR curves gives some insight into the design. Henry Kloss once said that lack of extreme FR extension can be managed if both extremes roll off smoothly and both rolloffs are balanced. The A25 had great deep bass, but started to rolloff below 100hz. Treble would extend to about 15khz, but only on axis, and would fall off noticeably off axis at 10khz. In typical listening rooms, with typical early SS equipment this was a great match. And efficiency was slighlty better than the AR4 meaning it could play louder and cleaner with a modestly powered receiver.