The 12" G320 from Beyma are quoted with a freq. resp of 40-5000hz. I am not sure if it can go down to around 70hz flat though. I have a whole book of Data Sheet of Beyma and the freq. response curve has shown it can reach down to 70hz. the CP-25 is a supertweeter with a small horn just like the JBL 2404H bi-radial horn if you are familiar with JBL. It has flat freq. resp upto 15khz after which it goes down a few decibel to 20khz. I thought and assume this would be just a good match with the 2" exit driver CP650ti which rolls-off sharply after 10khz.
sorry but I still have to ask regarding port size and length. I still do not understand how I am going to measure my port length and size for my 18G40 driver in a 320l enclosure. does it have a formula? I can't understand how to read the port sizes and length in WINISD and Boxplot shareware software.
thanks!!