1.2.3.In other cases, follow the instructions below:ProcedureUnscrew the 4 screws using the Torx 20 spanner enclosed and remove the audio unit frontcover.Set the audio unit location using the configuration jumper (7).Jumper setting Audio unit locationno jumpershaft bottomjumper upover the cabinjumper downunder the cabinReplace the cover and tighten the 4 screws.Bus ConnectionRemove the audio unit cover. Pull the bus through the bushing and put it on terminal 2 using theconnector enclosed. Maintain polarity (see the Audio Unit - Fireman Terminals, Connectors andJumpers figure above).Volume ControlSet the required volume using the trimmer (refer to the Description of Terminals, Connectors andJumpers above) on the electronics board.CautionAvoid duplicate audio unit settings.WarningThe audio unit is intended for 2N® Lift8 audio unit bus connection exclusively. Do notconnect it to other wires to avoid its damage or destruction.Maintain polarity while connecting the audio unit to avoid audio unit error.CautionThe audio unit is powered via a 2-wire bus. Disconnection of these wires results in theaudio unit switch-off.CautionUse the trimmer to set the best acoustic properties eliminating feedback.6