First off, pardon me if you thought I was hijacking your thread Guido. You could have used more tact, but I got your message.
I really am interested in what you are doing. If I'm really committing some taboo pm me or something. Do not wish any confrontation. I thought I could understand what you were doing better If I understood what the target was and Zilch, thank you for being helpful there. I find it more interesting now as I didn't realise this was an accepted problem. By two way do you mean only one crossover in the fundamental range or two drivers period. Also these various drivers with 1500 in there number, I believe (might be wrong) they are oem drivers in various consumer systems. Are there spec sheets for them or do you just have to know you like them from having listened to the system and then attempt to acquire them through parts or service. I'm sure every body is busy and you don't necessarily have time to answer questions from someone who can sometimes get on your last nerve but perhaps in time I could get up to speed. I'm afraid I'm the sort of person who has great difficulty allowing anything to remain a black box.
Thank you for whatever attention you give this
Thom