Hi. I've been reading the FAQ's here and have explored WinISD and some other stuff (like fdeck's program), etc. I'm not really seeing what I am looking for...or maybe just not realizing what I have is right in front of me.... I want software (free or paid..but not horribly expensive) that would allow me to model the response of a given bass cab construction with various sizes of speakers and crossovers points. So, for example, if I wanted to see what a given 15" with a given 6" mid would provide and then experiment with passive crossover points, I could do it all in one software program. Is there a program like this? Thanks for any helpful guidance on this. Yes I could buy a variety of commercial cabs or I could look at other projects posted here..I don't want to do that at present. I have seen the fEarful type posts here and I'm aware of the builders and the people selling kits, etc. I know about Bill F. stuff and I've read other DIY posts too. I am not interested in those projects at this time.