You would really need to know what the crossover network requirements of your speakers are (what crossover frequency etc) and what the nature of the crossover is that is included in the amplifier. You will need level controls on at least one of the amplifiers (the one with the highest gain), and you will need some way to determine what the response is that you are achieiving (like an RTA program and a calibrated microphone). It is not a straight forward exercise to actively bi-amp any speaker, and there is some technical expertise required. If you decide to proceed, just be careful about what you are doing, as you can easily blow the drivers in the speaker system if you hook things up wrong.