This will be my 2nd go around at building multi-way speakers and have decided to try a MTM configuration. When designing the crossovers, is there anything I need to do differently than I would do in a TW 2 way crossover? The mids will both be the same make/ model. I've ran some sims through xsim and removed one of the 2 mids after building one to see if it reacted. It did but not in the way I had expected. The SPL actually went up when disconnecting the 2nd driver. 1st pic is with 1 mid. Pic below it has both hooked up. Would that be normal?
You would see the reason for that if you turned on phase for each driver.
https://www.diyaudio.com/community/threads/xsim-configuring-the-plot-window.406106/
https://www.diyaudio.com/community/threads/xsim-configuring-the-plot-window.406106/
I don't see turning on phase as an option. I also thought thats what the light gold line was. I wont have a crossover designed until I get the mic I bought . It was supposed to be here yesterday. I was just practicing I guess when I saw the behavior and found it odd. I'm still trying to get a handle on it. I dont remember the last time I struggled to grasp something the way I have with crossovers. I can build motorcycles, cars, computers, anything out of wood yet crossovers are eluding me
It's the relative phase that matters, not the total phase. If they are further than 90 degrees apart you may see a reduction in the total when combined. See the lower image in post #1 at the link I posted showing the red and blue phase plots are nearer to each other.
As for turning on the phase plots, see the lower image in post #2. There is a small checkbox on the add curve window.
As for turning on the phase plots, see the lower image in post #2. There is a small checkbox on the add curve window.