I got another B&K TX4430 Amp with 3x200w rms but the 3rd channel is dead. I plan to completely disconnect the 3rd/c and use the exra O/P amp to add to the 2ch which each has 4pairs working perpectly (B&K Amp used modular PCB with provisions for 5 pairs of O/P amps.).This idea base on EX4420 2x200w rms with 5pairs of O/P amp each.Is it possible or keep the 2/c as they are and leave the 3rd disconnected. Any advice or enlightenment to this exercise are most welcome? Thanks.