The ESB 8.165 is a mid-woofer from the 8000 series, engineered in Italy for those building custom multi-way audio systems. This 165 mm speaker handles a nominal power of 160 W and can reach transient peaks of 320 W, operating at a 3 Ohm nominal impedance. Its frequency response ranges from 45 Hz to 4,000 Hz with a sensitivity of 92 dB, ensuring a balanced output across the mid-bass spectrum. To achieve precise sound, the cone is crafted from non-pressed cellulose pulp coated with vinylester resin, paired with a rubber TSW surround and a Conex™ spider for stability. The internal architecture features a 32.4 mm double-layer voice coil wound on an aluminum former, which is cooled by an axial ventilation system to manage heat during intense use. A Y35 ferrite magnet, optimized via FEA simulation and supported by CNC machined metal parts, ensures linear magnetic flux for cleaner signal reproduction. Designed for enthusiasts who prefer to select their own tweeters and crossovers, this single-component driver includes a specialized terminal design that accommodates large gauge cables. The aluminum dust cap is fixed directly to the voice coil former, adding to the overall structural rigidity of the unit.