Joey,
I will be out of town this weekend, not in cell range so I won't be able to discuss the driver with you. It's easier to reach me at work during the week if that's something that is convenient for you.
I read an MCM 1900 spec sheet Michael had posted in old post, it said the frequency response for the MSSM is +or- 5dB 250Hz to 1,100Hz and the MSM is +or- 3 dB 400Hz to 6,000Hz. I have been playing around with the single stack and listening to individual boxes isolated from the others. Trying different connections with the same source material to the MSSM and the MSM trying both output connections from the crossover ( mid and sub mid and full signal ). Big difference in the two either way they are connected. The MSM can't come close to the lower frequencies of the MSSM and vice versa. I don't have near the history or experience you guys have but the MSSM is essential in my view.
Wish I could drop by and listen to your weekend setup. The KP600's sound like something I should hear!
Thanks again to all who have contributed to my questions, it has been helpful. Just in case anyone runs into a broken horn as in my other post. I took the broken horn from the MMTM to a local fiberglass shop. They were able to add a thin layer of glass to the outside of the horn and repair it. So one problem down and only a critter ruined K41 to go.
Good luck on the Graduation concerts, look forward to the pictures.
Casey