1913. Connection of output Zones: Z1~Z66 output Zones are controlled by Zone switch.The output power is shared by 6 output Zones.Installer should not connect load impedance lower than the rated impedance.14. 0/8Ω/70V/100V output 22.The 0/8Ω/70V/100 is a fix output terminal, it will not be controlled when other Zoneswitches are operating.Note:The total equivalent load impedance should not be lower than the rated load impedance.15. Power remote controlPower remote control terminal can switch on the PX-8240 by external control switch.To implement this function, the power switch of PX-8240 should be at “OFF” position.16. Back up battery connection