Weatherproof and rugged construction.
High SPL, crisp penetrating sound.
Voice coils precision-wound on an aluminium bobbin for efficient heat dissipation.
Model AU-40XT has a built-in 100V transformer with easily selectable power taps/impedance by changing the position of the rotary switch at the rear.
Degree of protection IP 66 provided, when mounted on a reflex horn, against foreign particles such as dust and jets of water thus making them ideal for outdoor use. Meets EN 60529.
Fitted back to reflexive horns WFA 21, As you can see screw system on tip of the driver unit
Connection to rear panel of Amplifier as COM-100V (Black wire is for COM & Red wire is for 100V)
Caution: Wrong connection may lead to Damage/burn your coil.