Hi djk,
I live in Italy and it is the first time I write in this forum.
I have a pair of LaScala's (a bit modified design as you can see) and a pair of Altec 515B 15"'s and a pair of 421 8H's. The 515B sounds faster and louder, ma with both drivers the bass is dry and not deep. So I have thought of your reflex box to add to bottom.
What internal volume do I consider for the 515 (and for the 421 too if you think this is a better choice) and for the dimension and lenght of the reflex port?
I use biamping (Audio Note Kit one for the highs and Adcom for the bass), a passive line filter only for the bass (I lower the coupled capacitor for the highs), and an Altec 288 with 311 horn.
Thanks in advance
Walter Creati