Following on from another thread I will post these pics in the mean time till I connect it up to a panel
https://www.securitywarehouse.co.uk/catalog/elmdene-flush-mounted-stainless-steel-16-ohm-extension-speaker-p-5054.html
to be fair we don't know. The service co might we'll be correct and its lost in translation. I cant think what single tap might be though without a bit more detail
yes as above 4g can be an issue, but id be looking at proving the panel with a test system to check it occurs in both panels and yes don't disable jam detect.
I have had a 1070 with an aerial fault cause supervision issues. Had to replace the board.