The ESX Signum SX840 is an 8-inch Subwoofer with a diameter of 20 cm and an impedance of 4 Ohms.
The construction includes a sturdy aluminum basket, a 50 mm voice coil with a winding height of 15 mm, and a ventilated pole core.
A double magnet weighing 2 x 1.3 kg supports the design.
The conical paper cone is combined with a single Nomex spider core.
The mounting depth is 114 mm, and the mounting diameter is 189 mm.
The linear excursion is X-Max +/- 13 mm.
Features 8-inch (20 cm) Subwoofer Sturdy aluminum basket 50 mm voice coil with a winding height of 15 mm Double magnet weighing 2 x 1.3 kg Ventilated pole core Single Nomex spider core Conical paper cone X-Max +/- 13 mm Technical Specifications RMS power 300 Watts Maximum power 600 Watts Impedance 4 Ohms Mounting depth 114 mm Mounting diameter 189 mm Diameter 20 cm (8 inches)