I have a set of the 12" ones from Quantum 5's and want to put them in my SM-120 cabs. I have to cut the inner diameter a little more so I will be doing that tomorrow. Question is how do I wire them in since I am not using a dual coil crossover? Could someone diagram how to jump the 2 sets of terminals so I am running straight through both coils? Also, which coil would I go through first and how would I identify which coil is which?
Thanks in advance
I'm a little late on this, but...
Swapping woofers as you propose really opens up a big can of worms. A properly designed, crossover takes into account a number of things, including, but not limited to: driver impedance, sensitivity, and the driver's natural response. These are the things we're most concerned with in your scenario.
Chances are that you have two 8r voice coils, in which case, you can get either 16, or 4r using them series or parallel. Unless you're just very lucky, you will not be able to hook up your DVC woofer to present an appropriate load for the "new" crossover. And, even you are lucky enough that this works out, you likely still won't get a very flat response, since what you are really concerned with it the impedance at the crossover point, since impedance varies with frequency. IOW, the 8r is the nominal, or average impedance. It will be lower at some frequencies and likely
much higher at others.
Even if you are lucky enough that this matches, you are still left with a possible sensitivity mismatch- the woofer will be playing too soft or loud relative to the mids and tweeters requiring a change in the crossover.
And, even if you are lucky enough that sensitivity works out, the woofers will likely have differing natural rolloffs which will change the effect the crossover has on the woofer's response, which will in turn effect the way the woofer and mid sum.
And, even if all of this works out, you still have to worry about box loading, which will effect bass response, and power handling. Since it looks like this new box is larger, if they are both sealed cabinets, you can always fill the larger cabinets to give a smaller internal volume comparable to the old box.
In short, it's a total crapshoot, and not likely to give you the result you desire.
I'm not familiar with the crossover for the DVC woofer, but chances are that it is used to provide baffle step compensation, by using one VC only at lower frequencies relative to the other coil.
