Originally Posted by Martycool007
So if you are building some existing design that uses...say...a 1" tweeter with a pair of 6&1/2" mids per speaker, and the crossover is already completed for this configuration. Can you then add, say...2 more 6 & 1/2" mids that are identical to the existing 6 & 1/2" mids that are aleady in there and connect them in parrell (maybe series, can't remember) using the same crossover?
If you do that the midrange section of the crossover will see too low of a load impedance, and its crossover frequency will move up about an octave.
If you impedance scale that portion of the crossover then the crossover frequency will be OK, but your tweeter will become weak. If there is attenuation in the tweeter side of the crossover, then reducing it could restore a well-balanced system.
As you add drivers you also end up changing driver acoustical blending, and that is yet another can of worms.
If you hook up the two new drivers through a replica of the midrange side of the existing crossover then that would also preserve the crossover frequency, but you still need to address the tweeter balance issue.
Doubling the number of bass drivers this way will halve the impedance of the loudspeaker system in the midrange, and that may have adverse effcts on the amplifier you use to drive this system.
Will this also not bring the low and mid-range up since it would be doubling the drivers cone surface area?
In this day and age it is usually easier and more productive to change the system's tonal balance using the kinds of built-in equalizers we find in modern AVRs.