On all our installations we provide 2-3 monitor mix, one amplifier per mix, we install QSC PLX-1802 amplifiers, these amplifiers can go to 2-ohms, this will provide 4-monitor speakers per channel giving a total of 8-monitors per amplifier....normally 4-monitors per amplifier. We do this just in case someone start daisy chaining monitors they will not damage the amplifiers...we use floor microphone boxes(mic. pockets)with 2-3 monitor mix & 3-4 XLR microphone connections per box. Our normal installs is 6-8 floor boxes, 3-4 boxes are wired for amplifier channel-1, the other is wired for channel-2. We do this for monitor-1, amplifier-1, the same for monitor mix-2, Amplifier-2, & monitor mix-3, amplifier-3....this will allow enough monitors without amplifier damage...the amplifiers is wired with parallel inputs for each monitor mix....since we been doing this, we have no more amplifier problems with overloading...