I have contacts which would independently test for me in the UK. In fact, of the DIY designs on the market, how many people (apart from Bill FM) actually provide curves of their speaker response? I see that Fearful only provide a tuning frequency. I could claim my tuning frequency is 22 Hz -would that make my speaker sell - probably not but it would generate interest. This is a good question. Do I have to provide this type of information or let the public decide? I suppose I want to prove to myself and others that I can design good speakers but whats the point if it provides misleading information. Bearfaced loudspeakers provide lots of information which is much more meaningful than most technical specs but we have no information as to how they are tested and no plots to look at to judge or compare. The response may be very flat or lumpy and from the information we see, it is difficult to know. So, what do you think? Do I do a fearful or a Barefaced? One thing I am not going to do is provide useless information that I cannot justify! By the way, thanks to all those offering words of encouragement. I am not a quitter but I also am not ready to enter this market commercially (many reasons). When I do, it will be with something special.