Rja, As far as I know the sub is available, when I bought my Adagios there was some info with it, with a picture. It is called the Allegro, available in the same colours, I believe for $3000. 1000watt amp, 92db sensitivity, Frequency 19 to 100hz+- 3db, H 18", W 29", D 19". Personally, the Adagios have enough base for my needs.