Hi,
(1) "Multizone selector with PA / sound mixer2 mic and 1 Auxiliary input cut type tone control" is used in sound and speaker system.
What is multi-zone selector and sound mixer2?
(2) What is a 16 channel power amplifier?
(3) What is "PA announce and music sound selector auto mode for pair to audio cable interconnection to fire alarming 4 loop panel".
(4) Why we need "CD, MP4, DVD, USB, cassette player/recorder of PA player 500 watts suitable for 230 volts AC and 12 VDC operation?"
(5) Why we need sheet metal enclosures and 6 way terminal connectors with sound and speaker system?
Regards,