Mixing subwoofers

I know typically it’s a bad idea mixing subwoofer sizes and looks a little ghetto at times but, I am wondering if anyone here has a little insight on how this idea would work. I am looking to build a custom box for 2 10s and 1 15 I have an audio control d6.1200 with the dsp. Obviously the 15 is gonna be in its own chamber different from the 10s if I set up the crossover to have a the 15 playing low bass and the 10s playing higher bass each on there own amp with different crossover setup will this idea work?

 

It will work, but it wont sound right. Your subs only play from around 80-100 hz and below. So to set your crossovers to make the 15 play low and the 10s play a little higher your going to have 20-40hz on the 15 and 40-80hz on the 10s. Then due to crossover slope your going to have all the subs playing between 35-45hz resulting is a massive increase in bass for just those frequencies.

If you want to have all 3 subs in there, just give them all the same frequencies. But even then your going to have 2 fast subs and 1 slightly slower sub that may result in "muddy" bass sounds.

 

This is not something I would do on an amplifier with integrated DSP.

Obviously the amplifier channels on the D6.1200 don’t have enough power to adequately drive subwoofers. There is only one pair of aux out as well, so you would have to daisy chain signal to two sub amps, which means you lose independent control over crossover and delay between the two.

To properly try and set this up, it would require a separate DSP, as well as the instrumentation to measure impulse response so you can time align the two sub channels. I would not use the same low pass setting for both.

I do think one could get good results with enough investment, but reasonably, you would do just as well with smart equipment selection using same sized drivers.