Hello Russell
Phase is one of those things that is dependent on circumstances. An example is older JBL's are reverse to the standard. As long as you don't mix them with standard phase cabinets all is good. If you mix them with modern cabinets one of them will need to be reveresed so the bass doesn't cancel.
With drivers in a typical 2 way speaker system, the crossover slope, 12db 18db or 24db is going to have a hand in it. Most 12 db networks have the drivers wired with one phase reversed so they sum properly. 18dB can go either way and 24db are drivers in phase. Another issue can be the drivers physical offsets. A prime example is a longish horn like the old JBL fog horns 2307/2312. The offset and crossover frequency can combine so on a standard 12db network, where the drivers would normally be hooked up opposite phase, they can end up in phase to sum properly.
Bottom line is it's not as simple as it sounds and you really need to look at it on a case by case systems basis.
Rob
Phase is one of those things that is dependent on circumstances. An example is older JBL's are reverse to the standard. As long as you don't mix them with standard phase cabinets all is good. If you mix them with modern cabinets one of them will need to be reveresed so the bass doesn't cancel.
With drivers in a typical 2 way speaker system, the crossover slope, 12db 18db or 24db is going to have a hand in it. Most 12 db networks have the drivers wired with one phase reversed so they sum properly. 18dB can go either way and 24db are drivers in phase. Another issue can be the drivers physical offsets. A prime example is a longish horn like the old JBL fog horns 2307/2312. The offset and crossover frequency can combine so on a standard 12db network, where the drivers would normally be hooked up opposite phase, they can end up in phase to sum properly.
Bottom line is it's not as simple as it sounds and you really need to look at it on a case by case systems basis.
Rob