BPSHEEP

I have the RC-64 BTW. I forgot to mentoin that. Changing the crossover points shouln't be too difficult. Changing the driver is the tough one for me. I have been looking for a suitable replacement but not anything solid at his point. I have about 6 different speaker projects going on right now so a little stretched on time to give to much to the RC-64. It sounds good as it is. But I believe that upgarding the driver and changing the crossover points would be a noticeable improvement, just like you say. Does the RC-64 II still have the 1" horn throat? I would really like to see a schematic of the RC64-II crossover, or even a photo. Then I could be assured I have the crossover mods correct. I have a feeling its just a couple of different capacitor values being used. Would love to know exactly what they are supposed to be. Maybe I have this wrong, but it seems the tweeter would cross over at 1400 Hz. The 1.25" driver they had before probably couldn't handle that low. I really can't assume anything without having a quick look at the crossover. But if it is using the same driver as some of the other RF7 models used, those looked an awful lot like the P.AUDIO BMD440 PRO. But the specs on that driver just don't seem to match the RC-64. Not a real impressive curve, IMO. The Selenium D220Ti might be a good option. It has a pretty nice flat response curve and will go down to 1000Hz. In one of my other projects I am going to purchase a few of these D220Ti drivers. It would be a good opportunity to see how one does in the RC-64. See if it even fits etc. I'll let you know what I find out. If anyone knows where I can find a schematic of these, please point me to it.

I realize this is an old post, but thought it would be worth updating for anyone reading this. I was comparing the cut-sheets between the two models. What I have read does not agree with the original reviewers statement. From what I can tell is there are really two differences between the models.THey replaced the 1.25" titanium dome tweeter with a 1.75" version and they lowered the 1800 Hz crossover of one woofer pair down to 1400Hz as well as the other pair being lowered from 1150 to 1100 Hz. Just guessing here, but with the larger tweeter they were probably able to let it handle more of the signal.With the tractrix horn I would guess the more of the signal coming from there the better. Net gain in the newer model, seems to be, an additional 450 Hz coming from the tweeter. I will have to look into upgrading my RC-64 with a new tweeter and see about changing the cap on the crossover to lower it to 1400HZ.Should make for a good project. Anyone done this already?