The ESB 5.165 mid-bass drivers from the 5000 series are designed to handle low and middle frequencies in a high-fidelity audio system. These 165 mm speakers deliver a nominal power of 160 watts, though they can manage transient peaks up to 320 watts, operating at a nominal impedance of 3 ohms with a sensitivity of 95 dB. Their frequency response ranges from 50 Hz to 3.5 KHz, ensuring a balanced output across the lower spectrum. Construction focuses on rigidity and precision, featuring an exponential cone made from a carbon fiber reinforced polymer matrix composite. This is supported by a self-extinguishing carbon fiber reinforced ABS frame with eight twin-spokes to minimize resonance, while the TSW double-wave rubber suspension and Conex® spider maintain stability during movement. Inside, a 25 mm CCAW double layer voice coil on an aluminum former is paired with an FEA optimized magnet motor that utilizes both axial and radial ventilation to prevent overheating. To ensure clarity, these drivers incorporate CNC machined metal parts and a pure copper ring within the magnetic field to reduce harmonic distortion. This combination of advanced materials and thermal management makes them suitable for audiophiles building custom car audio systems who require precise mid-bass reproduction without distortion.