knightrider358 wrote:Now stupid the reason I used the MBQ xovers is mainly due to fact that they have seperate inputs from an amp for the mid bass and the tweeter thats why I got them because in the next 6 months Im gonna use the front side of the amp for highs and the rear side for the mids

which is a better set up for the DQX cause the built in xover has a highpass, bandpass, and a lowpass output so for me to use the full potential of the dqx Im gonna have to rewire the mids and highs.
Hold on there...
Right now you are bi-amping your MB Quart crossover? In that case, just remove it completely and run the components active! The ZX450 also has the same crossovers that your DQX has... they are super easy to configure. You can run highpass to the tweeter, and bandpass to the mid.
Front
X10 - press in
FREQ - your tweeter's crossover frequency... so ~2500-3000
CONFIG - HP
Rear
Input Select - 3
CONFIG - HP/LP
FREQ - your midrange's crossover frequency... so ~60-80
Also note the aux-output in this case contains all the sub frequencies (below ~60-80, whatever you set your rear dial to). This way you can run one set of RCAs and run your whole setup active if you want to.
This is what you are talking about doing with your DQX, but if you do this with the MB Quart crossover as well, it will not work. In this case you are trying to change your crossover frequencies and slopes, but the passive has them internally set anyways. It adds nothing by being there when you are running active... it just saps your power and messes up your active crossover frequencies.
So I say if you are running a crossover, do not biamp the MB Quart crossover to the RSDs, since it has a different crossover frequency and slope. It may also have built in filtering to make the specific set of Quarts sound better, but it would only make your RSDs sound worse in this case. If you want to power them independently, don't bother bi-amping and go straight to active.