i agree.
you cant put 2 different amps together for a number of reasons. power output, crossovers, even the way the internal components react to everything. you just dont do it. and while we are on this topic, dont mix different subs either. to run 3 speakers you would need one amp, or 2 amps that you can strap. not every amp can be strapped so you have to look 1st. now if you run 4 subs (or 2) you could easily run 2 of any amp you want.